Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation and Consolidation Consolidation, Policy [Policy Text Block] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Restructuring and Related Activities [Abstract] Summary of the restructuring accrual and changes Restructuring and Related Costs [Table Text Block] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Foreign Currency Translation Adjustment Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Unrealized (Loss) Income on Intra-Entity Foreign Currency Transactions Accumulated Net Gain Loss On Intra Entity Foreign Currency Transactions [Member] Changes to accumulated comprehensive income resulting from net gain (loss) on intra-entity foreign currency transactions. Unrealized Holding Gains (Losses) on Available-for-Sale Securities Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss) [Line Items] Changes in accumulated other comprehensive income (loss) AOCI Attributable to Parent, Net of Tax [Roll Forward] December 31, 2017 Stockholders' Equity Attributable to Parent Other comprehensive (income) Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Tax effect Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Total comprehensive (income) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent March 31, 2018 Statement of Financial Position [Abstract] Accounts receivable, allowance for doubtful accounts (in dollars) Allowance for Doubtful Accounts Receivable, Current Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (shares) Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (shares) Common Stock, Shares Authorized Common stock, shares issued (shares) Common Stock, Shares, Issued Common stock, shares outstanding (shares) Common Stock, Shares, Outstanding Treasury stock, shares (shares) Treasury Stock, Shares Equity Method Investments and Joint Ventures [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Sequential Technology International Holdings, LLC Sequential Technology International Holdings, LLC [Member] Sequential Technology International Holdings, LLC [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Goldman Sachs Bank USA Goldman Sachs Bank USA [Member] Goldman Sachs Bank USA [Member] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Indirect Guarantee of Indebtedness Indirect Guarantee of Indebtedness [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] STIH STIH [Member] STIH [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Sequential Technology International, LLC Sequential Technology International, LLC [Member] Sequential Technology International, LLC [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] BPO Divestiture BPO Divestiture [Member] BPO Divestiture [Member] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Equity method investment Equity Method Investments Equity method investment, ownership interest Equity Method Investment, Ownership Percentage Equity method investment (loss) income Income (Loss) from Equity Method Investments Duration of Customer Contract Duration of Customer Contract Duration of Customer Contract Discontinued Operation, Intra-Entity Amounts, Discontinued Operation after Disposal, Revenue Discontinued Operation, Intra-Entity Amounts, Discontinued Operation after Disposal, Revenue Restricted Cash, Current Restricted Cash, Current Restructuring Restructuring and Related Activities Disclosure [Text Block] Earnings Per Share [Abstract] Earnings per Common Share Earnings Per Share [Text Block] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] As Reported Calculated under Revenue Guidance in Effect before Topic 606 [Member] Impacts of the New Revenue Standard Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Calculated under Revenue Guidance in Effect After Topic 606 Calculated under Revenue Guidance in Effect After Topic 606 [Member] Calculated under Revenue Guidance in Effect After Topic 606 [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Net revenues Revenues Costs and expenses: Costs and Expenses [Abstract] Cost of revenues Cost of Services, Excluding Depreciation, Depletion, and Amortization Research and development Research and Development Expense Selling, general and administrative Selling, General and Administrative Expense Restructuring charges Restructuring Charges Depreciation and amortization Depreciation, Depletion and Amortization Total costs and expenses Costs and Expenses Loss from continuing operations Operating Income (Loss) Interest income Investment Income, Interest Interest expense Interest Expense Equity method investment income Other Nonoperating Income (Expense) Equity method investment (loss) income Loss from continuing operations, before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest (Provision) benefit for income taxes Income Tax Expense (Benefit) Net loss from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income from discontinued operations, net of taxes Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss attributable to redeemable noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Preferred stock dividend Preferred Stock Dividends, Income Statement Impact Preferred stock dividend Net Income (Loss) Attributable to Parent Basic: Earnings Per Share, Basic [Abstract] Income (Loss) from Continuing Operations, Per Basic Share Income (Loss) from Continuing Operations, Per Basic Share Discontinued operations (usd per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Basic (usd per share) Earnings Per Share, Basic Diluted: Earnings Per Share, Diluted [Abstract] Income (Loss) from Continuing Operations, Per Diluted Share Income (Loss) from Continuing Operations, Per Diluted Share Discontinued operations (usd per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Diluted (usd per share) Earnings Per Share, Diluted Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Weighted average common shares outstanding - basic (shares) Weighted Average Number of Shares Outstanding, Basic Weighted average common shares outstanding - diluted (shares) Weighted Average Number of Shares Outstanding, Diluted Fair Value Disclosures [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Marketable securities: Certificates of Deposit [Member] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Certificates of deposit Municipal Bonds [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Securities in unrealized loss position: Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] Securities in unrealized loss position: Total Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Equity Method Investments Equity Method Investments [Table Text Block] Stockholders' Equity Note [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted stock awards Restricted Stock [Member] Stockholder's Equity Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of Awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Non-vested at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Non-vested at the end of the period (in shares) Weighted-Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Non-vested at the beginning of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Non-vested at the end of the period (in dollars per share) Basis of Presentation and Consolidation Basis of Presentation and Significant Accounting Policies [Text Block] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] 2016 Share Repurchase Program Share Repurchase Program2016 [Member] Information pertaining to February 2016 share repurchase program. Treasury Stock Equity, Class of Treasury Stock [Line Items] Treasury Stock Treasury Stock, Number of Shares and Restriction Disclosures [Abstract] Number of shares repurchased under program (shares) Treasury Stock, Shares, Acquired Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Litigation Status [Axis] Litigation Status [Axis] Litigation Status [Domain] Litigation Status [Domain] Pending Litigation Pending Litigation [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] The Securities Law Actions The Securities Law Actions [Member] The Securities Law Actions [Member] Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Earn-out Obligations Under Acquisition Agreement [Member] Represents the contingencies related to provisions under the acquisition agreement. Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Miyowa Miyowa S A [Member] Represents Miyowa S.A., an acquisition of the entity. Legal Matters Loss Contingencies [Line Items] Number of complaints filed Loss Contingency, New Claims Filed, Number Number of former shareholders (shareholder) Loss Contingency, Number of Plaintiffs Business Combinations [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Divestiture of SpeechCycle Divestiture of SpeechCycle [Member] Divestiture of SpeechCycle [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Divestiture consideration Disposal Group, Including Discontinued Operation, Consideration Period of transition services agreement Disposal Group, Including Discontinued Operation, Period of Transition Services Agreement Disposal Group, Including Discontinued Operation, Period of Transition Services Agreement Gain on divestiture Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Commitments and Contingencies Legal Matters and Contingencies [Text Block] Statement [Table] Statement [Table] Stock options Employee And Directors Stock Options [Member] An arrangement whereby an employee or member of the Board of Directors is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Statement [Line Items] Statement [Line Items] Schedule of stock-based compensation Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Schedule of fair value assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of information about stock options outstanding Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of total intrinsic value for options exercised and fair value of vested options Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block] Schedule of unvested restricted stock Schedule of Nonvested Share Activity [Table Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Amended Credit Facility Amended And Restated Credit Agreement [Member] Information pertaining to Amended and Restated Credit Agreement (the "Credit Agreement"). Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Credit Facility Line of Credit [Member] 2017 Term Facility Secured Debt [Member] Revolving Facility Revolving Credit Facility [Member] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] 2019 Notes Convertible Senior Notes Due2019 [Member] Represents activity related to 0.75% Convertible Senior Notes due 2019 (the "2019 Notes"). Debt Instrument [Line Items] Debt Instrument [Line Items] Amortization of debt issuance costs Amortization of Debt Issuance Costs Commitment fees Debt Instrument, Unused Borrowing Capacity, Fee Interest expense on borrowings Interest Expense, Debt Additional interest on default Additional Interest Expense on Default Additional Interest Expense on Default Non-cash interest on leased facility Interest Expense, Lessee, Assets under Capital Lease Other Interest Expense, Other Interest Expense Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Honeybee Software Honeybee Software [Member] Honeybee Software [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Total preliminary cash consideration transferred Payments to Acquire Businesses, Gross Convertible Senior Notes Debt Instrument, Face Amount Unamortized debt issuance costs (1) Debt Issuance Costs, Net Total debt, carrying value Long-term Debt, Fair Value Total short term debt, carrying value Short-term Debt Total long-term debt, carrying value Long-term Debt Fair Value Measurements of Assets and Liabilities Fair Value Disclosures [Text Block] Income Tax Disclosure [Abstract] Income Tax Contingency [Table] Income Tax Contingency [Table] Intralinks Holdings, Inc. Acquisition of Intralinks Common Stock [Member] Purchase of Intralinks Common Stock [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Net loss from continuing operations Change in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Unrecognized tax benefits assumed Unrecognized Tax Benefits, Increase Resulting from Acquisition Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Contract Liabilities Contract with Customer, Liability Revenue recognized in the period Contract with Customer, Liability, Revenue Recognized Amounts billed but not recognized as revenue Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress Contract Liabilities Investments Equity Method Investments and Joint Ventures Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Other comprehensive income, net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Unrealized (loss) gain on available for sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Net income on intra-entity foreign currency transactions Other Comprehensive Income, Net Gain (Loss) on Intra Entity Foreign Currency Transactions Arising During Period, Net of Tax Represents the amount after tax, changes to accumulated comprehensive income resulting from net gain (loss) on intra-entity foreign currency transactions. Comprehensive loss Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive loss attributable to redeemable noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive loss attributable to Synchronoss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Number of Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options outstanding at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Options Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options Cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Options outstanding at the end of the period (in shares) Vested or expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted-Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Balance at the beginning of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Options Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Options Cancelled (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Balance at the end of the period (in dollars per share) Vested or expected to vest (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted-Average Remaining Contractual Term Share Based Compensation Arrangement by Share Based Payment Award, Options Weighted Average Remaining Contractual Term [Abstract] Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Vested or expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Share Based Compensation Arrangement by Share Based Payment Award, Aggregate Intrinsic Value [Abstract] Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Vested or expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Additional disclosures related to stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Total intrinsic value for stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Statement of Cash Flows [Abstract] Long-term Debt Long-term Debt [Member] Operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Adjustments to reconcile Net loss to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation, Depletion and Amortization, Net of Impairment Depreciation, Depletion and Amortization, Net of Impairment Depreciation, Depletion and Amortization, Net of Impairment Change in fair value of financial instruments Fair Value Adjustment of Warrants Accrued PIK interest Paid-in-Kind Interest Income Paid-in-Kind Interest Income Earnings (loss) from equity method investments Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Gain on disposals Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Assets of discontinued operations Amortization of bond premium Amortization of Debt Discount (Premium) Deferred income taxes Deferred Income Tax Expense (Benefit) Stock-based compensation Share-based Compensation Contingent consideration obligation Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Other assets Increase (Decrease) in Accounts Receivable Accounts payable Increase (Decrease) in Prepaid Expense and Other Assets Accrued expenses Increase (Decrease) in Other Operating Assets Payments on contingent consideration Increase (Decrease) in Accounts Payable Other liabilities Increase (Decrease) in Accrued Liabilities Deferred revenues Increase (Decrease) in Other Operating Liabilities Lease obligation interest payment Repayments of Debt and Capital Lease Obligations Deferred revenues Increase (Decrease) in Deferred Revenue Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Purchases of fixed assets Payments to Acquire Property, Plant, and Equipment Purchases of intangible assets and capitalized software Payments for Software Proceeds from the sale of Speechcycle Proceeds from Sale of Property, Plant, and Equipment Purchases of marketable securities available for sale Payments to Acquire Available-for-sale Securities Maturity of marketable securities available for sale Proceeds from Sale and Maturity of Available-for-sale Securities Investing in discontinued operations Payments to Acquire Interest in Subsidiaries and Affiliates Business acquired, net of cash Payments to Acquire Businesses, Net of Cash Acquired Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Share-based compensation-related proceeds, net of taxes paid on withholding shares Proceeds from Stock Options Exercised Payments of debt issuance costs Payments of Debt Issuance Costs Proceeds from issuance of long term debt Proceeds from Issuance of Long-term Debt Repayment of revolving line of credit Repayments of Lines of Credit Proceeds from sale of Treasury Shares Proceeds from Sale of Treasury Stock Proceeds from issuance of preferred stock Proceeds from Issuance of Redeemable Preferred Stock Payments on capital obligations Repayments of Long-term Capital Lease Obligations Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Net increase in cash, restricted cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, restricted cash and cash equivalents, beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, restricted cash and cash equivalents, end of period Supplemental disclosures of non-cash investing and financing activities: Supplemental Cash Flow Information [Abstract] Issuance of common stock in connection with Intralinks acquisition Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash per the Consolidated Balance Sheets Restricted Cash Total cash, cash equivalents and restricted cash Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Redeemable Noncontrolling Interests Redeemable Noncontrolling Interest [Member] Represents the portion of liability or temporary equity in a subsidiary not attributable, directly or indirectly, to the parent. Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Changes in fair value of the Company’s Level 3 redeemable noncontrolling interests Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] December 31, 2017 Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Fair value adjustment Temporary Equity, Accretion to Redemption Value Net loss attributable to redeemable noncontrolling interests Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings March 31, 2018 Cumulative Effect on Retained Earnings, Net of Tax Cumulative Effect on Retained Earnings, Net of Tax Net Income (Loss) Attributable to Parent Accumulated deficit Retained Earnings (Accumulated Deficit) Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value Measurements of Assets and Liabilities Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Schedule of assets and liabilities held and their related classifications under the fair value hierarchy Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of estimated fair value of investments classified as available for sale Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Expected maturities Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of changes in fair value of Level 3 Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of Debt Schedule of Debt [Table Text Block] Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] STI STI [Member] STI [Member] Restricted cash Equity Method Investment, Summarized Financial Information, Restricted Cash and Cash Equivalents, Current Equity Method Investment, Summarized Financial Information, Restricted Cash and Cash Equivalents, Current Accounts receivable Equity Method Investment, Summarized Financial Information, Accounts Receivable, Net, Current Equity Method Investment, Summarized Financial Information, Accounts Receivable, Net, Current Total assets Equity Method Investment, Summarized Financial Information, Assets Accrued expenses Equity Method Investment, Summarized Financial Information, Current Liabilities Total liabilities Equity Method Investment, Summarized Financial Information, Liabilities Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Selling, general and administrative Selling, General and Administrative Expenses [Member] Impala Impala [Member] Impala [Member] Intralinks Holdings, Inc. Intralinks Holdings, Inc. [Member] Intralinks Holdings, Inc. [Member] Acquisition Business Acquisition [Line Items] Transaction costs Business Combination, Acquisition Related Costs Borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Total preliminary consideration transferred Business Combination, Consideration Transferred Proceeds from credit agreement Proceeds from Long-term Lines of Credit Schedule of New Accounting Pronouncements and Changes in Accounting Principles Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Contract with Customer, Asset and Liability Contract with Customer, Asset and Liability [Table Text Block] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Employee Stock Purchase Plan Employee Stock [Member] Employee Stock Purchase Plan Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Term of employee stock purchase plan Term of Employee Stock Purchase Plan Represents the term of Employee Stock Purchase Plan to all active employees. Total number of shares available for purchase (shares) Common Stock, Capital Shares Reserved for Future Issuance ESPP participation period Employee Stock Purchase Plan Payroll Withholding Period The period of time that employees participate through payroll withholdings in the Employee Stock Purchase Plan. Percentage of fair market value of common stock Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Maximum percentage of total combined voting power a participant is allowed to be granted a right to purchase common stock Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum Maximum common shares available for purchase (shares) Common Stock, Maximum Number of Shares Authorized Within any Purchase Period Common Stock, Maximum Number of Shares Authorized Within any Purchase Period Maximum value of common shares available for purchase Common Stock, Maximum Value of Shares Authorized Within any Calendar Year Common Stock, Maximum Value of Shares Authorized Within any Calendar Year Amortized Cost Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due after 1 year through 5 years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Due after 5 years through 10 years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Due after 10 years Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Total available-for-sale securities Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis Fair Value Available-for-sale Securities, Debt Maturities, Single Maturity Date [Abstract] Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due after 1 year through 5 years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Due after 5 years through 10 years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Due after 10 years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Total available-for-sale securities Available-for-sale Securities, Debt Maturities, Single Maturity Date Income Taxes Income Tax Disclosure [Text Block] Acquisitions and Divestitures Business Combination Disclosure [Text Block] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Restricted cash Restricted Cash and Cash Equivalents, Current Marketable securities Available-for-sale Securities, Current Accounts receivable, net of allowances of $3,235 and $3,107 at March 31, 2018 and December 31, 2017, respectively (1) Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Marketable securities Available-for-sale Securities, Noncurrent Property and equipment, net Property, Plant and Equipment, Net Goodwill Goodwill Intangible assets, net Finite-Lived Intangible Assets, Net Deferred tax assets Deferred Tax Assets, Net Other assets Other Assets, Noncurrent Note receivable from related party Due from Related Parties, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued expenses Accrued Liabilities, Current Deferred revenues Deferred Revenue, Current Lease financing obligation Liabilities, Current Lease financing obligation Capital Lease Obligations, Noncurrent Convertible debt, net of debt issuance costs Convertible Notes Payable, Noncurrent Deferred tax liabilities Deferred Tax Liabilities, Net Deferred revenues Deferred Revenue, Noncurrent Other liabilities Other Liabilities, Noncurrent Redeemable noncontrolling interest Redeemable Noncontrolling Interest, Equity, Carrying Amount Preferred Stock, Value, Issued Preferred Stock, Value, Issued Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Stockholders’ equity: Common Stock, Value, Issued Treasury Stock, Value Treasury Stock, Value Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax Stockholders' Equity Attributable to Parent Liabilities and Equity Liabilities and Equity Amortized Cost to Fair Value Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract] Amortized Cost Available-for-sale Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Fair Value Available-for-sale Securities Stockholders' Equity Shareholders' Equity and Share-based Payments [Text Block] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Employment termination costs Employee Severance [Member] Facilities consolidation Facility Closing [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Accrued expenses Accrued Liabilities [Member] Restructuring accrual and changes Restructuring Cost and Reserve [Line Items] Restructuring accrual and changes Restructuring Reserve [Roll Forward] Balance at December 31, 2017 Restructuring Reserve Charges Payments Payments for Restructuring Other Adjustments1 Interest rate, as a percent Debt Instrument, Interest Rate, Stated Percentage Principal amount Long-term Debt, Gross Debt Issuance Costs, Noncurrent, Net Debt Issuance Costs, Noncurrent, Net Conversion ratio Debt Instrument, Convertible, Conversion Ratio Conversion price Debt Instrument, Convertible, Conversion Price Repurchase price, expressed as a percentage of principal of debt repurchased Debt Instrument, Repurchase Price as a Percentage of Principal Amount Repurchased Represents the purchase price of debt to be repurchased expressed as a percentage of the principal amount of the repurchased debt. Interest on borrowings Debt Instrument, Interest Rate, Effective Percentage Debt Instrument, Interest Rate, Effective Percentage Long-term Debt, Fair Value Convertible Debt, Additional Interest for Non-compliance, Percent Convertible Debt, Additional Interest for Non-compliance, Percent Convertible Debt, Additional Interest for Non-compliance, Percent Convertible Debt, Second Additional Interest for Non-compliance, Percent Convertible Debt, Second Additional Interest for Non-compliance, Percent Convertible Debt, Second Additional Interest for Non-compliance, Percent Debt Instrument, Debt Default, Percent of Holders Debt Instrument, Debt Default, Percent of Holders Debt Instrument, Debt Default, Percent of Holders Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Description of Business Description of Business Nature of Operations [Text Block] Schedule of changes in accumulated other comprehensive income (loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Summary of assets and liabilities held by the Company and their related classifications under the fair value hierarchy Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets Assets, Fair Value Disclosure [Abstract] Cash, cash equivalents and restricted cash Cash and Cash Equivalents, Fair Value Disclosure Marketable securities-short term Marketable securities-long term Assets, Fair Value Disclosure Assets, Fair Value Disclosure Total assets Liabilities, Fair Value Disclosure [Abstract] Contingent interest derivative (3) Business Combination, Contingent Consideration, Liability Convertible Debt Interest Derivative Convertible Debt Interest Derivative Convertible Debt Interest Derivative Financial and Nonfinancial Liabilities, Fair Value Disclosure Financial and Nonfinancial Liabilities, Fair Value Disclosure Total liabilities Fair Value, Assets Measured on Recurring and Nonrecurring Basis, Alternative [Abstract] Redeemable noncontrolling interests Redeemable Noncontrolling Interest, Equity, Other, Fair Value Transfers between Levels Fair Value, Transfers Between Level 1 and Level 2, Description and Policy [Abstract] Fair value of asset transfers between Levels 1, 2, and 3 Fair Value, Assets, Transfers between Levels 1, 2, and 3, Amount Amount of transfers of assets measured on a recurring basis between Levels 1, 2, and 3 of the fair value hierarchy. Weighted-average assumptions Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Expected stock price volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected life of options (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Weighted-average fair value (grant date) of the options (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Seller Note Financing Receivable, Gross Impaired Financing Receivable, Recorded Investment Impaired Financing Receivable, Recorded Investment Unamortized Discount Financing Receivable, Unamortized Discount (Premium), Cumulative Balance Financing Receivable, Unamortized Discount (Premium), Cumulative Balance Unamortized Discount Financing Receivable, Unamortized Discount (Premium) Financing Receivable, Unamortized Discount (Premium) Loan Accrued Interest Accrued Investment Income Receivable Loan Accrued Interest Accrued Investment Income Receivable, Net Accrued Investment Income Receivable, Net Distribution Note Escrow Deposit Distribution interest Interest on Escrow Deposit Interest on Escrow Deposit Distribution interest Interest on Escrow Deposit, Net Interest on Escrow Deposit, Net Total Financing Receivable, Net Cumulative balance Financing Receivable, Net, Cumulative Balance Financing Receivable, Net, Cumulative Balance Accounts receivable, net of allowances of $3,235 and $3,107 at March 31, 2018 and December 31, 2017, respectively Total current assets Mandatorily redeemable financial instrument Derivative Liability, Current Total current liabilities Commitments and contingencies Commitments and Contingencies Series A Convertible Participating Perpetual Preferred Stock, $0.0001 par value; 10,000 shares authorized; 185 shares issued and outstanding at March 31, 2018 Common stock, $0.0001 par value; 100,000 shares authorized, 52,274 and 52,024 shares issued; 41,220 and 46,965 outstanding at March 31, 2018 and December 31, 2017, respectively Treasury stock, at cost (11,054 and 5,059 shares at March 31, 2018 and December 31, 2017, respectively) Accumulated other comprehensive loss Total stockholders’ equity Total liabilities and stockholders’ equity Cost of revenues Cost of Sales [Member] Research and development Research and Development Expense [Member] Share-based compensation expense Employee Service Share-based Compensation, Aggregate Disclosures [Abstract] Total stock-based compensation expense Allocated Share-based Compensation Expense Total stock-based compensation before taxes Allocated Share-based Compensation Expense, Including Discontinued Operations Allocated Share-based Compensation Expense, Including Discontinued Operations Tax benefit Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Stock-based compensation cost related to non-vested equity awards not yet recognized as an expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted-average period over which stock-based compensation cost related to non-vested equity awards is expected to be recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Schedule of reconciliation of the numerator and denominator used in computing basic and diluted net income attributable to common stockholders per common share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Retained Earnings Capitalized Contract Cost, Net Capitalized Contract Cost, Net Revenue, Remaining Performance Obligation Revenue, Remaining Performance Obligation Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Percent Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Percent Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Percent Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Subsequent Events Review Subsequent Events [Text Block] Income Statement [Abstract] Interest expense Other expense, net Net loss Net loss attributable to redeemable noncontrolling interests Preferred stock dividend Net loss attributable to Synchronoss common shareholders Continuing operations (usd per share) Continuing operations (usd per share) Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares) Document and Entity Information Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Debt Debt Disclosure [Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Chief Executive Officer Chief Executive Officer [Member] Board of Directors Chairman Board of Directors Chairman [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] EBITDA Non-Compliance EBITDA Non-Compliance [Member] EBITDA Non-Compliance [Member] Conversion of Stock Conversion of Stock [Member] Conversion of Stock [Member] Silver Private Holdings I, LLC Silver Private Holdings I, LLC [Member] Silver Private Holdings I, LLC [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Ownership Percentage [Axis] Ownership Percentage [Axis] Ownership Percentage [Axis] Ownership Percentage [Domain] Ownership Percentage [Domain] [Domain] for Ownership Percentage [Axis] Ten Percent or Greater Ownership Ten Percent or Greater Ownership [Member] Ten Percent or Greater Ownership [Member] Greater than Five and Less than Ten Percent Ownership Greater than Five and Less than Ten Percent Ownership [Member] Greater than Five and Less than Ten Percent Ownership [Member] Performance Shares Performance Shares [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Quarterly Vesting After First Anniversary Quarterly Vesting After First Anniversary [Member] Quarterly vesting period after first anniversary of grant date of award. Vesting First Anniversary Vesting First Anniversary [Member] Represents activity related the awards vesting on the first anniversary of date of grant. Vesting Monthly Continuous Service Vesting Monthly Continuous Service [Member] Vesting periods after first anniversary of grant date of award. Vesting Monthly Continuous Service After Second Anniversary Vesting Monthly Continuous Service After Second Anniversary [Member] Vesting periods after second anniversary of grant date of award. Vesting Performance Goal Attained Vesting Performance Goal Attained [Member] Vesting period determined by date that the goals under the performance stock awards are achieved. Annual Vesting Of Performance Awards After Initial Achievement Annual Vesting Of Performance Awards After Initial Achievement [Member] Annual vesting of performance awards after initial goals are achieved. Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Stock Incentive 2000 Plan Stock Incentive2000 Plan [Member] Represents the 2000 stock incentive plan of the reporting entity. Equity Incentive Plan 2015 Equity Incentive Plan2015 [Member] Definition: Information pertaining to the 2015 Equity Incentive Plan (the "2015 Plan"). Stock Incentive 2006 Plan Stock Incentive2006 Plan [Member] Represents the 2006 stock incentive plan of the reporting entity. Stock Incentive 2010 Plan Stock Incentive2010 Plan [Member] Represents the 2010 stock incentive plan of the reporting entity. Stock Incentive 2000 And 2006 Plan Stock Incentive2000 And2006 Plan [Member] Represents the 2000 and 2006 stock incentive plan of the reporting entity. New Hire Equity Incentive Plan 2017 New Hire Equity Incentive Plan 2017 [Member] New Hire Equity Incentive Plan 2017 [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Stock Common Stock [Member] Series A Preferred Stock Series A Preferred Stock [Member] Class of Stock [Line Items] Class of Stock [Line Items] Designated preferred stock (in shares) Number of votes per share (vote) Number of Votes Per Share Represents the number of votes available for each share held. Dividends Dividends Shares available for grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Award vesting rights, percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Payment of reimbursement fees Business Combination, Payment of Reimbursement Fees Business Combination, Payment of Reimbursement Fees Preferred Stock, Dividend Rate, Percentage Preferred Stock, Dividend Rate, Percentage Convertible Preferred Stock, Conversion Price Per Share Convertible Preferred Stock, Conversion Price Per Share Convertible Preferred Stock, Conversion Price Per Share Number of Elected Directors Number of Elected Directors Number of Elected Directors Number Of Board Of Directors Elected Meeting Independence Criteria Number Of Board Of Directors Elected Meeting Independence Criteria Number Of Board Of Directors Elected Meeting Independence Criteria Preferred Stock, Ownership Percentage Preferred Stock, Ownership Percentage Preferred Stock, Ownership Percentage Long-term Debt, Fair Value, Approval Threshold Long-term Debt, Fair Value, Approval Threshold Long-term Debt, Fair Value, Approval Threshold Fair Market Value of Transaction, Individual Fair Market Value of Transaction, Individual Fair Market Value of Transaction Fair Market Value of Transaction, Aggregate Fair Market Value of Transaction, Aggregate Fair Market Value of Transaction, Aggregate Capital Expenditure Threshold Capital Expenditure Threshold Capital Expenditure Threshold Conversion of Stock, Percentage Ownership after Conversion Conversion of Stock, Percentage Ownership after Conversion Conversion of Stock, Percentage Ownership after Conversion Conversion of Stock, Voting Percentage Threshold of Ownership Conversion of Stock, Voting Percentage Threshold of Ownership Conversion of Stock, Voting Percentage Threshold of Ownership Number Of Board Of Director Members Number Of Board Of Director Members Number Of Board Of Director Members Number Of Board Of Director Members Elected By Preferred Stock Holders Number Of Board Of Director Members Elected By Preferred Stock Holders Number Of Board Of Director Members Elected By Preferred Stock Holders Number Of Board Of Directors Agreed Upon To Be Elected Meeting Independence Criteria Number Of Board Of Directors Agreed Upon To Be Elected Meeting Independence Criteria Number Of Board Of Directors Agreed Upon To Be Elected Meeting Independence Criteria Minimum Number Of Board Of Director Members That Preferred Stock Holders Can Appoint Pursuant To Certification Minimum Number Of Board Of Director Members That Preferred Stock Holders Can Appoint Pursuant To Certification Minimum Number Of Board Of Director Members That Preferred Stock Holders Can Appoint Pursuant To Certification Maximum Ownership Threshold Allowed For Director Election Rights, Percent Maximum Ownership Threshold Allowed For Director Election Rights, Percent Maximum Ownership Threshold Allowed For Director Election Rights, Percent Equity Agreement, Demand Registrations Allowed Under Agreement Equity Agreement, Demand Registrations Allowed Under Agreement Equity Agreement, Demand Registrations Allowed Under Agreement Equity Agreement, Demand Registrations Allowed Under Agreement Annually Equity Agreement, Demand Registrations Allowed Under Agreement Annually Equity Agreement, Demand Registrations Allowed Under Agreement Annually Equity Agreement, Demand Registration, Minimum Percentage Of Shares Equity Agreement, Demand Registration, Minimum Percentage Of Shares Equity Agreement, Demand Registration, Minimum Percentage Of Shares Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Cloud Cloud [Member] Cloud [Member] Digital Digital [Member] Digital [Member] Messaging Messaging [Member] Messaging [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Professional Services Professional Services [Member] Professional Services [Member] Transaction Services Transaction Services [Member] Transaction Services [Member] Subscription Services Subscription Services [Member] Subscription Services [Member] License License [Member] License [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] AMERICAS Americas [Member] APAC Asia Pacific [Member] EMEA EMEA [Member] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Convertible Debt Securities Convertible Debt Securities [Member] Employee Stock Option Employee Stock Option [Member] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share Reconciliation [Abstract] Earnings Per Share Reconciliation [Abstract] Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Preferred stock dividend Preferred Stock Dividends and Other Adjustments Preferred stock dividend Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Net (loss) income from continuing operations attributable to Synchronoss Interest on Convertible Debt, Net of Tax Income effect for interest on convertible debt, net of tax Net Income (Loss) from Continuing Operations Available to Common Shareholders, Diluted Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Shares from assumed conversion of convertible debt (shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Options and unvested restricted shares (shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Basic (usd per share) Diluted (usd per share) Anti-dilutive stock options excluded (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount