Intralinks (IL) 10-K 13 Mar 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Mar. 03, 2014	Jun. 30, 2013
Document and Entity Information [Abstract]	'	'	'
Document type	'10-K	'	'
Amendment flag	'false	'	'
Document year focus	'2013	'	'
Document period focus	'FY	'	'
Document period end date	31-Dec-13	'	'
Current fiscal year end date	'--12-31	'	'
Entity central index key	'0001488075	'	'
Entity Current Reporting Status	'Yes	'	'
Entity filer category	'Accelerated Filer	'	'
Entity registrant name	'Intralinks Holdings, Inc.	'	'
Entity Voluntary Filers	'No	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity common stock shares outstanding	'	56,187,930	'
Entity Public Float	'	'	$270.30

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current Assets:	'	'
Cash and cash equivalents	$50,540	$43,798
Accounts receivable, net of allowances of $2,927 and $2,149, respectively	38,322	37,667
Investments	34,886	31,549
Deferred taxes	12,148	7,469
Prepaid expenses	6,036	5,474
Restricted Cash and Cash Equivalents	2,442	0
Other current assets	4,576	3,518
Total current assets	148,950	129,475
Fixed assets, net	14,100	10,645
Capitalized software, net	32,341	26,295
Goodwill	215,869	215,478
Other intangibles, net	83,648	106,750
Other assets	1,054	1,111
Total assets	495,962	489,754
Current Liabilities:	'	'
Accounts payable	11,052	4,451
Short-term Debt	209	1,030
Accrued expenses and other current liabilities	26,667	20,320
Deferred revenue	44,651	40,719
Total current liabilities	82,579	66,520
Long term debt	75,004	75,238
Deferred taxes	16,989	21,135
Other long term liabilities	5,289	4,809
Total liabilities	179,861	167,702
Commitments and contingencies (Note 16)	'	'
Stockholders' Equity:	'	'
Undesignated Preferred Stock, $0.001 par value; 10,000,000 shares authorized; 0 shares issued and outstanding as of December 31, 2012 and December 31, 2011	0	0
Common Stock, $0.001 par value; 300,000,000 shares authorized; 55,486,651 and 54,248,178 shares issued and outstanding as of December 31, 2012 and December 31, 2011, respectively	56	55
Additional paid-in capital	429,549	419,618
Accumulated deficit	-112,714	-97,436
Accumulated other comprehensive (loss) income	-790	-185
Total stockholders' equity	316,101	322,052
Total liabilities and stockholders' equity	$495,962	$489,754

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
ASSETS	'	'
Allowance for Doubtful Accounts Receivable	$3,152,000	$2,927,000
Series A Redeemable Convertible Preferred Stock [Member]	'	'
Statement [Line Items]	'	'
Preferred stock par value	$0.00	$0.00
Authorized shares, preferred	10,000,000	10,000,000
Issued shares, preferred	0	0
Outstanding shares, preferred	0	0
Common Stock [Member]	'	'
Statement [Line Items]	'	'
Common stock par value	$0.00	$0.00
Authorized shares, common	300,000,000	300,000,000
Issued shares, common	56,054,484	55,486,651
Outstanding shares, common	56,054,484	55,486,651

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]	'	'	'
Revenue	$234,496	$216,667	$212,890
Other revenue	0	0	614
Total revenue	234,496	216,667	213,504
Cost of revenue	64,885	62,354	56,385
Gross profit	169,611	154,313	157,119
Operating Expenses:	'	'	'
Sales and marketing	108,428	96,198	88,872
General and administrative	57,063	50,608	40,808
Product development	20,014	21,092	18,579
Impairment loss on capitalized software	0	8,715	0
Total operating expenses	185,505	176,613	148,259
(Loss) income from operations	-15,894	-22,300	8,860
Interest expense	4,136	6,435	10,645
Amortization of debt issuance cost	358	740	1,369
Other (income), net	239	-1,870	-3,123
Net loss before income tax	-20,627	-27,605	-31
Income tax (benefit)	-5,349	-10,225	1,212
Net (loss)	($15,278)	($17,380)	($1,243)
Net (loss) income per common share	'	'	'
Basic (in dollars per share)	($0.28)	($0.32)	($0.02)
Diluted (in dollars per share)	($0.28)	($0.32)	($0.02)
Weighted average number of shares used in calculating net (loss) income per share	'	'	'
Basic	55,135,657	54,352,536	53,381,655
Diluted	55,135,657	54,352,536	53,381,655

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive (Loss) Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]	'	'	'
Net (loss)	($15,278)	($17,380)	($1,243)
Foreign currency translation adjustment, net of tax	-605	-236	-192
Total other comprehensive income loss, net of tax	-605	-236	-192
Comprehensive (loss) income	($15,883)	($17,616)	($1,435)

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Preferred Stock and Stockholders' Equity Statement (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
In Thousands, except Share data, unless otherwise specified
Balance at Dec. 31, 2010	$287,444	$52	$365,962	($78,813)	$243
Balance (in shares) at Dec. 31, 2010	'	52,387,374	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'
Foreign currency translation adjustment net of tax	-192	0	0	0	-192
Net loss	-1,243	0	0	-1,243	0
Proceeds from initial public and follow-on offerings, including underwriters' overallotment shares, net of offering costs (in shares)	'	1,437,500	'	'	'
Proceeds from initial public and follow-on offerings, including underwriters' overallotment shares, net of offering costs	34,488	2	34,486	0	0
Forfeiture of Restricted Unvested Common Stock (in shares)	'	-187,679	'	'	'
Forfeiture of Restricted Unvested Common Stock	1,374	0	1,374	0	0
Exercise of stock options for Common Stock (in shares)	'	412,050	'	'	'
Exercise of stock options for Common Stock	1,251	0	1,251	0	0
Issuance of common stock in connection with employee stock purchase plan (in shares)	'	127,876	'	'	'
Issuance of common stock in connection with employee stock purchase plan	0	0	0	0	0
Granted (in shares)	'	71,057	'	'	'
Stock-based compensation expense	8,708	0	8,708	0	0
Balance at Dec. 31, 2011	331,830	54	411,781	-80,056	51
Balance (in shares) at Dec. 31, 2011	'	54,248,178	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'
Foreign currency translation adjustment net of tax	-236	0	0	0	-236
Net loss	-17,380	0	0	-17,380	0
Exercise of stock options for Common Stock (in shares)	'	341,764	'	'	'
Exercise of stock options for Common Stock	481	0	481	0	0
Issuance of common stock in connection with employee stock purchase plan (in shares)	'	187,417	'	'	'
Issuance of common stock in connection with employee stock purchase plan	795	0	795	0	0
Granted (in shares)	'	0	'	'	'
Stock-based compensation expense	6,561	0	6,561	0	0
Common Stock, Shares, Issued	709,292	'	'	'	'
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	1	1	0	0	0
Balance at Dec. 31, 2012	322,052	55	419,618	-97,436	-185
Balance (in shares) at Dec. 31, 2012	'	55,486,651	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'
Foreign currency translation adjustment net of tax	-605	0	0	0	-605
Net loss	-15,278	0	0	-15,278	0
Exercise of stock options for Common Stock (in shares)	'	405,328	'	'	'
Exercise of stock options for Common Stock	1,106	1	1,105	0	0
Issuance of common stock in connection with employee stock purchase plan (in shares)	'	86,338	'	'	'
Issuance of common stock in connection with employee stock purchase plan	540	0	540	0	0
Granted (in shares)	'	0	'	'	'
Stock-based compensation expense	8,286	0	8,286	0	0
Common Stock, Shares, Issued	76,167	'	'	'	'
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	0	0	0	0
Balance at Dec. 31, 2013	$316,101	$56	$429,549	($112,714)	($790)
Balance (in shares) at Dec. 31, 2013	'	56,054,484	'	'	'

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Cash Flows [Abstract]	'	'	'
Net loss	($15,278)	($17,380)	($1,243)
Adjustments to reconcile net (loss) income to cash provided by operating activities:	'	'	'
Amortization of intangible assets	23,644	25,774	28,630
Depreciation and amortization	20,864	18,567	19,999
Stock-based compensation expense	8,286	6,561	8,708
Capitalized Computer Software, Impairments	0	8,715	0
Amortization of deferred costs	1,517	1,808	1,472
Provision for bad debts and customer credits	1,594	1,713	931
Change in deferred taxes	-8,338	-13,007	-1,166
Loss (gain) on disposal of fixed assets	0	15	228
Gain on interest rate swap	0	-1,455	-4,193
Currency remeasurement loss (gain)	-18	388	-318
Changes in operating assets and liabilities:	'	'	'
Accounts receivable	-2,363	-690	-2,692
Prepaid expenses and other current assets	-1,181	-873	-712
Accounts payable	5,142	-490	765
Accrued expenses and other liabilities	4,132	4,793	1,928
Deferred revenue	4,008	747	2,389
Net cash provided by operating activities	42,009	35,186	54,726
Cash flows from investing activities:	'	'	'
Capitalized software development costs	-20,495	-18,013	-18,718
Capital expenditures	-6,976	-8,014	-5,115
Fresh-Start Adjustment, Increase (Decrease), Restricted Cash and Cash Equivalents, Current	-2,443	0	0
Payments to Acquire Investments	-47,604	-37,445	-40,120
Payments for (Proceeds from) Investments	43,326	41,220	4,000
Business acquisition	-600	-300	0
Net cash used in investing activities	-34,792	-22,552	-59,953
Cash flows from financing activities:	'	'	'
Proceeds from exercise of stock options	1,645	1,276	2,625
Repayments of outstanding principal on long-term debt	-821	-15,861	-35,657
Repayments of outstanding financing arrangements	-708	-641	0
Payment of financing costs	-284	0	0
Proceeds from IPO and follow-on offering, net of underwriting discounts and commissions	0	0	35,003
Offering costs paid in connection with initial public offering and follow-on offerings	0	0	-516
Net cash (used in) provided by financing activities	-168	-15,226	1,455
Effect of foreign exchange rate changes on cash and cash equivalents	-307	-304	-1
Net (decrease) in cash and cash equivalents	6,742	-2,896	-3,773
Cash and cash equivalents at beginning of period	43,798	46,694	50,467
Cash and cash equivalents at end of period	50,540	43,798	46,694
Cash paid during the period for:	'	'	'
Interest	4,136	6,378	10,666
Income tax	2,416	2,005	3,181
Non-cash transactions during the period for:	'	'	'
Assets acquired through financing transactions	$0	$591	$1,325

Organization_and_Descrption_of

Organization and Descrption of Business	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization and Description of Business	'
	Organization and Description of Business
	Intralinks Holdings, Inc. ("Intralinks Holdings") and its subsidiaries (collectively, the "Company") is a leading global provider of Software-as-a-Service ("SaaS") solutions for secure content management and collaboration within and among organizations. The Company's cloud-based solutions enable organizations to control, track, search and exchange time-sensitive information, inside and outside of the firewall, all within a secure and easy-to-use environment. The Company's customers rely on its cost-effective solutions to manage large amounts of electronic information, accelerate information-intensive business processes, reduce time to market, optimize critical information workflows, meet regulatory and risk management requirements and collaborate with business counterparties in a secure, auditable and compliant manner. The Company helps its customers eliminate the inherent risks and inefficiencies of using email, fax, courier services and other existing solutions to collaborate and exchange information.
	The Company was incorporated in Delaware as "Intralinks, Inc." in June 1996. In June 2007, the Company completed a merger (the "Merger") pursuant to which Intralinks, Inc. became a wholly-owned subsidiary of TA Indigo Holding Corporation, a Delaware corporation formed by an investor group led by TA Associates, Inc., which is now part of TA Associates Management, L.P., a prominent growth private equity firm, and Rho Capital Partners, Inc., an investment and venture capital management company and one of the principal investors in Intralinks, Inc. since 2001. In 2010, the Company changed the name of TA Indigo Holding Corporation to "Intralinks Holdings, Inc." and on August 5, 2010, the Securities and Exchange Commission declared effective the Company's registration statement on Form S-1, in connection with its initial public offering of 11.0 million shares of common stock.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	Summary of Significant Accounting Policies
	Principles of Consolidation - The accompanying Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries, prepared in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP"). All intercompany balances and transactions have been eliminated in consolidation.
	Use of Estimates - The preparation of Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements and the reported amounts of revenue and expenses during the reporting period.
	Significant estimates and assumptions made by management include the determination of the fair value of stock options and estimated forfeitures of equity-based awards, fair value of the Company's reporting unit, valuation of intangible assets (and their related useful lives), fair value of financial instruments, certain components of the income tax provisions, including valuation allowances on the Company's deferred tax assets, accruals for certain compensation expenses, allowances for doubtful accounts and reserves for customer credits. The Company bases estimates and assumptions on historical experience and on various other factors that it believes to be reasonable under the circumstances. The Company evaluates its estimates and assumptions on an ongoing basis. Actual results could differ from those estimates.
	Out-of-period Adjustments - During the financial statement close process for the three months ended June 30, 2013, the Company identified a prior period error totaling $0.8 million, which was corrected and recorded as a cumulative adjustment to long-term deferred tax assets within the Consolidated Balance Sheet at June 30, 2013, and was reflected as an income tax expense within the Consolidated Statement of Operations for the three and six months ended June 30, 2013. The Company does not believe that this adjustment is material to the Consolidated Financial Statements for any prior period or to the 2013 results.
	During the financial statement close process for the three months ended March 31, 2012, the Company identified a prior period error totaling $0.8 million, which was corrected and recorded as a cumulative adjustment to long-term deferred tax assets within the Consolidated Balance Sheet at March 31, 2012, and was reflected as an income tax benefit within the Consolidated Statement of Operations for the three months ended March 31, 2012. The Company does not believe that this adjustment is material to the Consolidated Financial Statements for any prior period or to the 2012 results.
	Revenue Recognition - The Company derives revenue principally through fixed commitment contracts under which the Company provides customers various services, including access to the cloud-based Intralinks Platform, including Intralinks exchanges and Intralinks VIA, as well as the related customer support and other services. The Company's customers do not have a contractual right, or the ability, to take possession of the Intralinks software at any time during the hosting period, or contract with an unrelated third party to host the Intralinks software. Therefore, revenue recognition for the Company's services is not accounted for under specific guidance of the Financial Accounting Standards Board ("FASB") on software revenue recognition. The Company recognizes revenue for its services ratably over the contracted service period, provided that there is persuasive evidence of an arrangement; the service has been provided to the customer; collection is reasonably assured; the amount of fees to be paid by the customer is fixed or determinable; and the Company has no significant remaining obligation at the completion of the contracted term. In circumstances where the Company has a significant remaining obligation after completion of the initial contract term, revenue is recognized ratably over the extended service period. The Company's contracts do not contain general rights of return.
	From time to time, the Company agrees to sales concessions with its customers a reserve for which is estimated based on historical patterns of actual credits issued. Expenses associated with maintaining this reserve are recorded as a reduction to revenue, which the Company believes represents an accurate reflection of the underlying business activity for each reporting period and is in line with the requirement that all revenue recognized during the period is earned and realizable.
	The Company offers services to customers through single-element and multiple-element arrangements, some of which contain offerings for optional services, including document scanning, data archiving and other professional services. In accordance with the FASB's guidance on multiple-deliverable arrangements, the Company has evaluated the deliverables in its arrangements to determine whether they represent separate units of accounting, specifically whether the deliverables have value to the Company's customers on a standalone basis. The Company has determined that the services delivered to customers under its existing arrangements generally represent a single unit of accounting. Revenue for optional services is recognized as delivered, or as completed, provided that the general revenue recognition criteria described above are met. The Company continues to evaluate the nature of the services offered to customers under its fixed commitment contracts, as well as its pricing practices, to determine if a change in policy regarding multiple-element arrangements and related disclosures is warranted in future periods.
	Additionally, certain of the Company's customer contracts contain provisions for set-up and implementation services relating to the customer's use of the Intralinks Platform. The Company believes that these set-up and implementation services provide value to the customer over the entire period that the exchange is active, including renewal periods, and therefore the revenue related to these set-up types of services are recognized over the longer of the contract term or the estimated relationship life which, as of December 31, 2013, generally ranged from two to four years. The Company will continue to evaluate the length of the amortization period of the revenue related to set up and implementation fees to determine if a change in estimate is warranted in future periods.
	Other Revenues - On November 25, 2008, one of the Company's primary facilities sustained water damage from a fire on a floor above, resulting in an interruption to the Company's operations. The Company filed a claim under its business interruption insurance policy for lost revenue caused by the down-time experienced subsequent to the loss event. The Company received insurance proceeds totaling $0.6 million during the year ended December 31, 2011, in response to its business interruption claim. Business interruption insurance proceeds are classified as "Other revenue" in the Consolidated Statement of Operations for the year ended December 31, 2011.
	Deferred Revenue - Deferred revenue represents the billed but unearned portion of existing contracts for services to be provided. Deferred revenue does not include the unbilled portion of existing contractual commitments of the Company's customers. Accordingly, the deferred revenue balance does not represent the total contract value of outstanding arrangements. However, amounts that have been invoiced are recorded as revenue or deferred revenue, as appropriate, and are included in the Company's accounts receivable balances. Deferred revenue that will be recognized during the subsequent 12-month period is classified as "Deferred revenue" with the remaining portion as non-current deferred revenue as a component of "Other long-term liabilities" on the Consolidated Balance Sheets.
	Stock-Based Compensation - The Company uses the Black-Scholes option pricing model to determine the fair value of options granted under its 2007 Stock Option and Grant Plan and the 2010 Equity Incentive Plan, as well as the rights awarded under its 2010 Employee Stock Purchase Plan, or ESPP. Using this model, fair value is calculated based on assumptions with respect to (i) expected volatility of the Company's common stock price, (ii) the expected life of the award, which for options is the period of time over which equity recipients are expected to hold their options prior to exercise and for ESPP rights is the period of time between the offering date and the exercise date (as defined in Note 12), (iii) expected dividend yield on the Company's common stock, and (iv) a risk-free interest rate, which is based on quoted U.S. Treasury rates for securities with maturities approximating the expected term. The use of different assumptions in the Black-Scholes pricing model would result in different amounts of stock-based compensation expense. Furthermore, if different assumptions are used in future periods, stock-based compensation expense could be materially impacted in the future.
	The fair value of restricted shares of common stock, or RSAs, and restricted stock units, or RSUs, is generally determined using the intrinsic value of the Company's common stock at the time of grant, with the exception of the 0.5 million performance based RSAs issued to the Company's Chief Executive Officer on February 1, 2012. The fair value of the performance based RSAs was determined using a Monte-Carlo simulation.
	The Company does not have a significant history of market prices, and as such, the Company estimates volatility in accordance with Securities and Exchange Commission Staff Accounting Bulletin Topic 14 D.1, using historical volatilities of similar public companies. The Company based its analysis of expected volatility on reported data for a peer group of companies within the Company's industry, using an average of the historical volatility measures of this peer group of companies. The Company intends to continue to consistently apply this process using the same or similar entities until a sufficient amount of historical information regarding the volatility of its own stock price becomes available, or unless circumstances change such that the identified entities are no longer similar to the Company, in which case, the Company would select and use in the calculation publicly available share price information for more suitable entities. Once a sufficient amount of historical information regarding the volatility of the Company's share price becomes available, the Company will utilize the closing prices of its publicly-traded common stock to determine its volatility. The expected life of options has been determined using the "simplified" method, which uses the midpoint between the vesting date and the end of the contractual term. The Company utilizes the simplified method of determining the expected life of options due to the limited period of time its common stock has been publicly traded, thus resulting in a lack of sufficient historical exercise data in a publicly traded environment to provide a reasonable basis upon which to estimate expected term. The Company intends to continue to consistently apply the simplified method until a sufficient amount of historical information regarding exercise data in a publicly traded environment becomes available. The risk-free interest rate is based on quoted U.S. Treasury rates for securities with maturities approximating the awards' expected term. The expected dividend yield is zero as the Company never paid dividends and does not currently anticipate paying any in the foreseeable future.
	Stocked-based compensation expense for stock options is recorded over the requisite service period, less estimated forfeitures. For grants of RSAs and RSUs, the Company records stock-based compensation expense based on the fair value of the shares on the grant date over the requisite service period, less estimated forfeitures. Stock-based compensation expense for ESPP rights is recorded in line with each respective offering period.
	The Company utilizes an estimated forfeiture rate when calculating expense for the period. The Company considers several factors when estimating future forfeitures, including types of awards, employee level and historical experience. If this estimated rate changes in future periods due to different actual forfeitures, the Company's stock-based compensation expense may increase or decrease significantly. If there are any modifications or cancellations of the underlying unvested securities or the terms of the awards, the Company may be required to accelerate, increase or cancel any remaining unamortized stock-based compensation.
	Sales Commissions - Commissions payable to the Company's sales staff are expensed in the period the related sales efforts are performed. Sales commission expense was $17.0 million, $13.4 million and $13.2 million, respectively, for the years ended December 31, 2013, 2012 and 2011 and are included within "Sales and marketing" in the Consolidated Statements of Operations.
	Advertising - The Company expenses the cost for producing and communicating advertising and promoting its services when incurred.
	Income Taxes - The Company accounts for income taxes on the asset and liability method pursuant to ASC 740, Income Taxes. Under this method, deferred income tax assets and liabilities are recognized for the future tax consequences of differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, as well as net operating loss and tax credit carryforwards. Deferred income taxes are measured using enacted tax rates expected to be applied to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred income taxes of a change in tax rates is recognized in results of operations in the period that includes the enactment date.
	Each reporting period, the Company assesses whether its deferred income tax assets are more-likely-than-not realizable, in determining whether it is necessary to record a valuation allowance. This includes evaluating both positive (e.g., sources of taxable income) and negative (e.g., recent historical losses) evidence that could impact the realizability of the Company's deferred income tax assets.
	The Company recognizes the impact of an uncertain tax position in its financial statements if, in management's judgment, the position is more-likely-than-not sustainable upon audit based on the position's technical merits. This involves the identification of potential uncertain tax positions, the evaluation of applicable income tax laws and measurement of the amount of each uncertain tax position that is more-likely-than-not sustainable. The Company operates within multiple taxing jurisdictions and is subject to audit in each of these jurisdictions. The Company recognizes interest expense and penalties on uncertain tax positions as part of income tax expense.
	Net Loss Per Share - Basic loss per share is computed using net loss and the weighted average number of common shares outstanding. Diluted loss per share reflects the weighted average number of shares of common stock outstanding plus any potentially dilutive shares outstanding during the period. Potentially dilutive shares consist of shares issuable upon the exercise of stock options and unvested shares of restricted common stock (using the treasury stock method) and conversion of preferred shares (using the as converted method). Common equivalent shares are excluded from the diluted computation if their effect is anti-dilutive.
	Foreign Currency Translation and Transactions - The functional currencies of the Company's foreign operations are the local currencies in each of the foreign subsidiary locations. Assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenue and expenses denominated in a foreign currency are translated into U.S. dollars on a monthly basis at the average exchange rate during the period. Adjustments resulting from translating foreign currency financial statements into U.S. dollars are recorded in "Accumulated other comprehensive loss" as a separate component of shareholders' equity within the Consolidated Balance Sheets. Foreign currency transaction gains and losses resulting from assets and liabilities denominated in a currency other than the subsidiary's local currency are reported in the Consolidated Statements of Operations as a component of "Other expense (income), net." For the years ended December 31, 2013, 2012 and 2011, foreign currency transaction losses (gains) were $0.3 million, $(0.3) million and $0.9 million, respectively.
	Comprehensive Loss - Comprehensive loss consists of net loss and other comprehensive loss. Other comprehensive loss includes certain changes in stockholders' equity that are excluded from net loss, specifically cumulative foreign currency translation adjustments. Comprehensive loss has previously been reflected in the Consolidated Statements of Changes in Stockholders' Equity and is now reflected in the Consolidated Statements of Comprehensive Loss.
	Cash and Cash Equivalents - The Company considers all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents consist of cash on deposit with banks, money market funds and certain investments in commercial paper.
	Investments - The Company's investment portfolio may at any time contain investments in U.S Treasury obligations, securities guaranteed by the U.S. government, certificates of deposit, corporate notes and bonds, medium-term notes, commercial paper, and money market mutual funds, with original maturities less than one year. The Company's investments with original maturity dates of less than three months from the purchase date are included in "Cash and cash equivalents" on the Consolidated Balance Sheets. The Company's investments with original maturity dates in excess of three months, but less than one year, from the purchase date are classified as short-term investments on the Consolidated Balance Sheets. Short-term investments classified as held-to-maturity are recorded at amortized cost. Interest earned on short-term investments is included in "Other expense (income), net" on the Consolidated Statements of Operations.
	Fair Value of Financial Instruments - The carrying amounts of the Company's cash and cash equivalents, short-term investments classified as held-to-maturity, accounts receivable, accounts payable and other accrued expenses, approximate fair value due to the short-term nature of these instruments. See "Derivative Instruments and Hedging Activities" below for a discussion of the Company's accounting policy for its interest rate swap.
	Concentration of Credit Risk - Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, investments and trade accounts receivable. Although the Company deposits its cash with more than one financial institution, its deposits, at times, may exceed federally insured limits. The Company has not experienced any losses on cash and cash equivalent accounts to date and the Company believes it is not exposed to any significant credit risk related to cash.
	The Company evaluates the adequacy of its allowance for doubtful accounts on a quarterly basis. This evaluation includes historical loss experience, length of time receivables are past due, adverse situations that may affect a customer's ability to repay and prevailing market conditions. This evaluation is inherently subjective and the Company may revise its estimates as more information becomes available.
	Property and Equipment, Net - Property and equipment are stated at cost, less accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of those assets, as follows:
	Computer equipment and capitalized software	3 years
	Office equipment	5 years
	Furniture and fixtures	5 years
	Leasehold improvements	Shorter of estimated useful life or remaining lease term
	Repairs and maintenance costs are expensed as incurred.
	Allowance for Doubtful Accounts - The Company evaluates the adequacy of the allowance for doubtful accounts on a quarterly basis. This evaluation includes historical loss experience, length of time receivables are past due, adverse situations that may affect a customer's ability to pay its obligation to the Company and prevailing market conditions. This evaluation is inherently subjective and the Company may revise its estimates as more information becomes available.
	Software Development Costs - The Company accounts for the cost of computer software developed or obtained for internal use of its application service by capitalizing qualifying costs, which are incurred during the application development stage and amortizing them over the software's estimated useful life. Costs incurred in the preliminary and post-implementation stages of the Company's products are expensed as incurred. The amounts capitalized include external direct costs of services used in developing internal-use software, payroll and payroll-related costs of employees directly associated with the development activities and interest. The Company amortizes capitalized software over the expected period of benefit, which is three years, beginning when the software is ready for its intended use. Software development costs are evaluated for recoverability whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. During 2012, the Company recorded an impairment loss on certain internal-use capitalized software of $8.7 million.
	Goodwill and Other Intangible and Long-Lived Assets - The Company assesses goodwill for impairment annually as of October 1 or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. The goodwill impairment test is based on the Company's single operating segment and reporting unit structure. In 2011, the FASB issued authoritative guidance which gives entities the option to qualitatively assess whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If the Company elects to perform a qualitative assessment and concludes it is not more likely than not that the fair value of its reporting unit is less than its carrying value, no further assessment is necessary; otherwise, the fair value of its reporting unit has to be determined and if the carrying value of its goodwill exceeds its implied fair value, an impairment loss equal to the excess is recorded. The Company adopted this newly issued authoritative guidance effective October 1, 2011.
	The Company's long-lived assets primarily consist of computer equipment, capitalized software, furniture, fixtures, office equipment and leasehold improvements, which are subject to depreciation over the useful life of the asset. Long-lived assets are evaluated for recoverability whenever events or changes in circumstances indicate that the carrying value of an asset may be impaired. In evaluating an asset for recoverability, the Company estimates the future cash flow expected to result from the use of the asset and eventual disposition. If the expected future undiscounted cash flow is less than the carrying amount of the asset, an impairment loss, equal to the excess of the carrying amount over the fair value of the asset, is recognized. No impairments were recorded on long-lived assets for the periods presented in these Consolidated Financial Statements.
	Other Intangibles, net - represents definite-lived intangible assets, which are being amortized over their estimated useful lives as follows:
	Developed technology	10 years
	Customer relationships	10 years
	Trade name	12 years
	Non-compete agreement	3 years
	Developed technology is amortized over its estimated useful life at a rate consistent with the expected future cash flows to be generated by the asset. All other definite-lived intangible assets are amortized on a straight-line basis over their estimated useful lives.
	Deferred Financing Costs - Deferred financing costs being amortized using the effective interest method over the expected remaining term of the loan. Amortized costs are presented separately as non-operating costs within the Company's Consolidated Statement of Operations.
	Derivative Instruments and Hedging Activities - During 2012 and 2011, the Company maintained an interest rate swap agreement to economically hedge its exposure to changes in the amounts of future cash flows, driven by the variable rates associated with the Company's long-term debt. The interest rate swap agreement matured on June 30, 2012. The interest rate swap was recorded on the Consolidated Balance Sheet in "Accrued expenses and other current liabilities" at fair value. The fair value of the interest rate swap was measured each reporting period and included a credit valuation adjustment that reflected consideration of the Company's own credit risk, since the interest rate swap was in a liability position. Valuations may have fluctuated considerably from period-to-period due to volatility in underlying interest rates, which was driven by market conditions and the duration of the derivative instrument. The Company does not hold any derivatives and does not use financial instruments for any trading or other speculative purposes at December 31, 2013.
	Warranties and Indemnification - The Company's revenue contracts generally provide for indemnification of customers against liabilities arising from third party claims that are attributable to the Company's breach of its warranties or infringement of third party intellectual property rights, subject to contractual limitations of liability. To date, the Company has not incurred any material costs as a result of such indemnifications and has not accrued any liabilities related to such obligations in the accompanying Consolidated Financial Statements as the Company currently has no infringement or warranty related disputes with customers or third parties.
	The Company has entered into contracts that include service level agreements with some of its customers in which the Company has warranted that it will provide certain levels of uptime. A subset of those customers have the explicit right, under the terms of their contracts, to receive credits or terminate their agreement in the event that the Company fails to meet those stated service levels. To date, the Company has not provided credits nor had any agreement canceled based on these service level agreements.
	The Company warrants that its service is provided in a manner reasonably designed for the secure transmission of customer data. The Company does not monitor its exposure to customer contracts in terms of maximum payout. In the event of an infringement claim giving rise to indemnification liability, the Company has the right to satisfy such obligations by providing a workaround or may suspend or terminate service to mitigate any liability. The Company relies on a risk framework to define risk tolerances and establish limits to ensure that certain risk-related losses occur within acceptable, predefined limits. Factors that it considers in determining exposure include the fact that the Company disclaims liability for consequential and indirect damages, including for loss of data, resulting from any breach of contract and that the Company, to date, has never had to do any make-good rework or been impacted by any payout in connection with any of these guarantees. Thus, the potential for the Company to be required to make payments under these arrangements is remote and, accordingly, no contingent liability is carried on the Consolidated Balance Sheet for these transactions.
	Recent Accounting Pronouncements
	In February 2013, the FASB issued new accounting guidelines that require disclosure of amounts reclassified from accumulated other comprehensive income to net income. The adoption of this accounting guidance, which became effective and was adopted by the Company as of January 1, 2013, had no material impact on the Company's Consolidated Financial Statements.
	In June 2013, the FASB ratified accounting guidance proposed by the Emerging Issues Task Force that requires entities to present an unrecognized tax benefit net with certain deferred tax assets when specific requirements are met. The amendments in this updated guidance are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The effect of this guidance has no impact on the Company's Consolidated Balance Sheet.

Investments_and_Fair_Value_Mea

Investments and Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Disclosure Text Block [Abstract]	'
Investments and Fair Value Measurements	'
	Investments and Fair Value Measurements
	The Company has classified its short-term investments in commercial paper and corporate bonds as held-to-maturity and as such, has recorded them at amortized cost. Interest earned on these debt securities is included in “Other expense (income), net” within the Consolidated Statements of Operations. The gross unrecognized holding gains and losses for the years ended December 31, 2013, 2012 and 2011 were not material.
	The following tables summarize these short-term investments as of December 31, 2013 and 2012:
						2013
	Security Type		Maturity		Consolidated Balance Sheet Classification	Amortized Cost
						(In thousands)
	Commercial Paper		176 to 269 Days		Investments (short-term)	$	6,791
	Corporate Notes		229 to 354 Days		Investments (short-term)	28,095
	Total					$	34,886
						2012
	Security Type		Maturity		Consolidated Balance Sheet Classification	Amortized Cost
						(In thousands)
	Corporate Bonds		44 to 72 Days		Cash and cash equivalents	$	2,509
	Commercial Paper		363 Days		Investments (short-term)	2,493
	Corporate Notes		152 to 365 Days		Investments (short-term)	29,056
	Total					$	34,058
	The fair value framework under the FASB’s guidance requires the categorization of assets and liabilities into three levels based upon the assumptions used to measure the assets or liabilities. Level 1 provides the most reliable measure of fair value, whereas Level 3, if applicable, generally would require significant management judgment. The three levels for categorizing assets and liabilities under the fair value measurement requirements are as follows:
	•	Level 1:  Fair value measurement of the asset or liability using observable inputs such as quoted prices in active markets for identical assets or liabilities;
	•	Level 2:  Fair value measurement of the asset or liability using inputs other than quoted prices that are observable for the applicable asset or liability, either directly or indirectly, such as quoted prices for similar (as opposed to identical) assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active; and
	•	Level 3:  Fair value measurement of the asset or liability using unobservable inputs that reflect the Company’s own assumptions regarding the applicable asset or liability.
	All of the Company's investments that are measured at fair value are Level 1 assets for all periods presented.
	The following table summarizes the assets measured at fair value on a recurring basis as of December 31, 2013:
			Total			Level 1		Level 2	Level 3
			(In thousands)
	Asset:
	Money market funds as cash equivalents		$	5,031		5,031		—	—
	The following table summarizes those assets measured at fair value on a recurring basis as of December 31, 2012:
			Total			Level 1		Level 2	Level 3
			(In thousands)
	Asset:
	Money market funds as cash equivalents		$	5,642		5,642		—	—

Goodwill_and_Other_Intangibles

Goodwill and Other Intangibles	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Other Intangibles	'
	Goodwill and Other Intangibles
	Goodwill
	At December 31, 2013, the Company has $215.9 million of goodwill. Goodwill is assessed for impairment annually as of October 1 or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. The goodwill impairment test is based on the Company's single operating segment and reporting unit structure. No goodwill impairment was identified in any of the years presented.
	While there were no qualitative factors that suggested the fair value of Intralinks was less than the carrying value, the Company elected to perform a quantitative impairment assessment as of October 1, 2013. Step 1 of the goodwill impairment test was performed using a combination of a market approach and an income approach using a discounted cash flow (“DCF”) analysis. The market approach considered the market capitalization of the Company as of October 1, 2013, adjusted for an estimated equity control premium of 20%. The estimated cash flows utilized in the DCF analysis were based on the Company’s most recent budget and business plans and, for years beyond the budget, the Company’s best estimate of future results, based, in part, on forecasted growth rates. Assumptions used in the DCF analysis include a 13% discount rate. Based on the results of the quantitative assessment, the estimated fair value of the Company's single reporting unit exceeds its carrying value and the second step of the impairment test is not necessary.
	The Company completed a qualitative impairment assessment as of October 1, 2012. Among the factors included in the Company's qualitative assessment were general economic conditions and the competitive environment, actual and expected financial performance, including consideration of the Company's revenue growth and improved operating results year-over-year, forward-looking business measurements, external market conditions, the Company's stock-price performance compared to overall market and industry peers, market capitalization, and other relevant entity-specific events. Based on the results of the qualitative assessment, the Company concluded that it is more likely than not that the fair value of its single reporting unit is higher than its carrying value, and therefore performance of the two-step quantitative impairment test was not necessary.
	As of December 31, 2013, other intangibles consists of the following:
		Definite – Lived Intangible Assets
		Gross		Accumulated Amortization			Net
		Carrying Amount					Carrying Amount
		(In Thousands)
	Customer relationships	$	141,973	$	(92,750	)	$	49,223
	Developed technology	132,642		(105,096		)	27,546
	Trade name	14,629		(7,980		)	6,649
	Non-compete agreements	1,039		(809		)	230
	Total	$	290,283	$	(206,635	)	$	83,648
	As of December 31, 2012, other intangibles consists of the following:
		Definite – Lived Intangible Assets
		Gross		Accumulated Amortization			Net
		Carrying Amount					Carrying Amount
		(In Thousands)
	Customer relationships	$	141,880	$	(78,553	)	$	63,327
	Developed technology	132,454		(96,960		)	35,494
	Trade name	14,618		(6,750		)	7,868
	Non-compete agreements	789		(728		)	61
	Total	$	289,741	$	(182,991	)	$	106,750
	The Company has not identified impairment for any of the definite-lived intangible assets through December 31, 2013.
	Total intangible amortization expense is classified in each of the operating expense categories as follows:
		Years Ended December 31,
		2013		2012			2011
		(In Thousands)
	Cost of revenue	$	8,136	$	10,369		$	13,237
	Sales and marketing	14,198		14,175			14,175
	General and administrative	1,310		1,230			1,218
	Total	$	23,644	$	25,774		$	28,630
	Estimated intangible amortization expense on an annual basis for the succeeding five years is as follows:
	For the years ending December 31,	Amount
		(In thousands)
	2014	$	23,470
	2015	23,470
	2016	23,387
	2017	11,386
	2018	1,249
	Thereafter	686
	Total	$	83,648

Fixed_Assets

Fixed Assets	12 Months Ended
	Dec. 31, 2013
Property Plant and Equipment Income Statement Disclosures [Abstract]	'
Fixed Assets	'
	Fixed Assets
	Fixed assets consisted of the following at:
		December 31,
		2013			2012
		(In thousands)
	Computer equipment and capitalized software	$	30,605		$	25,598
	Furniture, fixtures and office equipment	3,222			3,148
	Leasehold improvements	6,884			4,321
	Total fixed assets	40,711			33,067
	Less: Accumulated depreciation and amortization	(26,611		)	(22,422		)
	Fixed assets, net	$	14,100		$	10,645
	Depreciation expense relating to fixed assets for the years ended December 31, 2013, 2012 and 2011 was $5.1 million, $5.0 million and $5.9 million, respectively.

Capitalized_Software

Capitalized Software	12 Months Ended
	Dec. 31, 2013
Research and Development [Abstract]	'
Capitalized Software	'
	Capitalized Software
	Capitalized software consisted of the following at:
		December 31,
		2013			2012
		(In thousands)
	Capitalized software	$	96,478		$	83,432
	Less: Impairment of capitalized software	—			(8,715		)
	Less: Accumulated amortization	(64,137		)	(48,422		)
	Capitalized software, net	$	32,341		$	26,295
	In accordance with ASC 360, Property, Plant and Equipment — Impairment or Disposal of Long-Lived Assets, impairment is the condition that exists when the carrying value of a long-lived asset exceeds its fair value. If it is determined that the long-lived asset is not recoverable, an impairment loss is recognized and measured based on the excess of the carrying amount of the long-lived asset over the long-lived asset’s fair value.
	During the second quarter of 2012, management initiated a business strategy review to explore long-term growth opportunities. The objective was to assess the competitive environment, identify the most attractive market opportunities and further develop the Company’s execution strategy. In conjunction with this strategy review, management also initiated a company-wide evaluation of its internal systems, to determine whether certain internal server-based systems should be replaced by SaaS-based solutions. Management’s evaluation indicated that the carrying value of certain internal-use capitalized software exceeded its fair value. As such, the Company completed a valuation assessment, utilizing the cost replacement method, and concluded that this internal-use capitalized software is not fully recoverable and should be written down to its fair value. Accordingly, the Company recorded an impairment loss on internal-use capitalized software of $8.7 million during the year ended December 31, 2012.
	Amortization expense of capitalized software for the years ended December 31, 2013, 2012 and 2011 was $15.7 million, $13.6 million and $14.1 million, respectively.

Accrued_Expenses_and_Other_Cur

Accrued Expenses and Other Current Liabilities	12 Months Ended
	Dec. 31, 2013
Accrued Liabilities, Current [Abstract]	'
Accrued Expenses and Other Current Liabilities	'
	Accrued Expenses and Other Current Liabilities
	Accrued expenses and other current liabilities consisted of the following at:
		December 31,
		2013		2012
		(In thousands)
	Salaries, commissions and related expenses	$	15,601	$	10,162
	Other accrued expenses	11,066		10,158
	Total accrued expenses and other current liabilities	$	26,667	$	20,320

Income_Tax

Income Tax	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Tax	'
	Income Tax
	The following is a summary of the Company's net loss before income tax by jurisdiction:
		Years Ended December 31,
		2013			2012			2011
		(In thousands)
	U.S.	$	(21,375	)	$	(28,325	)	$	(214	)
	Non-U.S.	748			720			183
	Net loss before income tax	$	(20,627	)	$	(27,605	)	$	(31	)
	The components of the Company's income tax (benefit) expense are as follows:
		Years Ended December 31,
		2013			2012			2011
		(In thousands)
	Current:
	Federal	$	220		$	52		$	375
	State and local	626			726			986
	Foreign	2,143			1,852			952
	Total current income tax expense	2,989			2,630			2,313
	Deferred:
	Federal	(6,640		)	(10,396		)	1,061
	State and local	(1,483		)	(2,410		)	(1,908		)
	Foreign	(215		)	(49		)	(254		)
	Total deferred income tax benefit	(8,338		)	(12,855		)	(1,101		)
	Total income tax (benefit) expense	$	(5,349	)	$	(10,225	)	$	1,212
	A reconciliation of the provision for income taxes at the U.S. Federal statutory income tax rate of 35% to the Company's effective income tax rate is as follows:
		Years Ended December 31,
		2013			2012			2011
		(In thousands)
	Tax at U.S. federal statutory rate	$	(7,219	)	$	(9,662	)	$	(11	)
	State taxes, net of federal income tax effect	(557		)	(1,356		)	(668		)
	Stock-based compensation expense	1,334			(336		)	1,946
	Non-deductible expenses	438			212			712
	Foreign taxes	1,348			1,251			428
	Research and development credit	(1,008		)	(78		)	(1,231		)
	Other	315			(256		)	36
	Total	$	(5,349	)	$	(10,225	)	$	1,212
	Effective tax rate	25.9		%	37		%	(3970.2		)%
	Following is a summary of the components of deferred tax assets and deferred tax liabilities at December 31, 2013 and 2012:
		Years Ended December 31,
		2013			2012
		(In thousands)
	Net operating loss carryforwards - Current	$	5,972		$	3,792
	Accrued expenses	3,948			1,834
	Allowance for doubtful accounts	1,255			1,159
	Research and development tax credit	70			75
	Other	903			609
	Current deferred tax assets	12,148			7,469
	Net operating loss carryforwards - Non-current	7,701			15,427
	Research and development tax credit carryforwards	7,174			5,914
	AMT tax credit carryforwards	1,546			1,325
	Stock-based compensation	4,249			3,084
	Other	2,692			2,028
	Non-current deferred tax assets	23,362			27,778
	Total deferred tax assets	35,510			35,247
	Depreciation and amortization	(40,351		)	(48,913		)
	Non-current deferred tax liabilities	(40,351		)	(48,913		)
	Total deferred tax liabilities	(40,351		)	(48,913		)
	Net deferred tax liabilities	$	(4,841	)	$	(13,666	)
	At December 31, 2013, the Company had net operating loss carryforwards of $48.3 million, including $11.3 million of windfall tax benefits attributable to stock-based compensation. If not utilized, these net operating loss carryforwards will expire beginning in 2020 through 2030. The windfall tax benefits attributable to stock-based compensation will be recorded to additional paid-in capital when such amounts reduce income taxes payable. At December 31, 2013, the Company had U.S. Federal and state research and development tax credit carryforwards of $8.0 million and $4.1 million, respectively, which if not utilized, will expire beginning in 2020 through 2033.
	Due to ownership changes in 2001 and 2007, and the public stock offerings in 2010, the Company's net operating loss and research and development tax credit carryforwards are subject to limitations pursuant to IRC Sections 382 and 383 and similar state provisions. The Company has recorded the associated tax benefits on net operating loss and tax credit carryforwards that it believes are more-likely-than-not realizable, based on its evaluation of the foregoing limitations and both positive and negative evidence, including reversals of existing taxable temporary differences. As of December 31, 2013 the Company had no valuation allowance on its deferred tax assets.
	The following table summarizes changes to the Company's unrecognized tax benefits, excluding interest and penalties, for the periods presented:
		Years Ended December 31,
		2013			2012			2011
		(In thousands)
Beginning Balance as of January 1	$	3,335		$	3,161		$	2,578
Additions based on tax positions related to the current year	389			168			475
Additions for prior year tax positions	221			6			204
Reductions from expirations of applicable statutes of limitations	—			—			(56		)
Settlements	—			—			(40		)
Balance as of December 31,	$	3,945		$	3,335		$	3,161
If recognized, unrecognized tax benefits totaling $3.4 million at December 31, 2013, would impact our effective income tax rate. Our liability for unrecognized tax benefits is classified as part of "Other long-term liabilities" and as a reduction in long-term deferred tax assets on the Consolidated Balance Sheet.
At December 31, 2013, total accrued interest and penalties related to the uncertain tax positions was $0.2 million, which includes $0.03 million, $0.03 million, and $0.03 million recorded during the years ended December 31, 2013, 2012 and 2011, respectively. These amounts were recorded as part of income tax expense during the respective periods.
As a result of prior year net operating losses, the Company's U.S. Federal income tax returns for years 1999 through 2013 are open for examination by the U.S. Internal Revenue Service (the "IRS"). State and local income tax returns for 2010 through 2013 remain subject to examination by various state and local taxing authorities. The Company's non-U.S. income tax returns are also subject to income tax examination in various foreign jurisdictions. The Company concluded an audit by the IRS of its U.S. Federal income tax returns for the years ended December 31, 2006 through 2009 in the second quarter of 2013. The Company received Notices of Proposed Adjustments for 2006, 2007 and 2008 from the IRS disallowing $58.3 million of foreign branch losses on the basis that they constitute dual consolidated losses in the U.S. The IRS is asserting that the Company is not entitled to reasonable cause relief for late election filings. The Company disagrees with the proposed adjustments by the IRS and has filed an appeal. Management believes that it is more likely than not that the Company’s position will ultimately be sustained. Further, management believes it has adequately provided for all uncertain tax positions, and any potential audit adjustments would not have a material impact on the Company's financial position. The Company does not anticipate that the total amounts of its unrecognized tax benefits will significantly increase or decrease over the next twelve months.

Debt

Debt	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt	'
	Debt
	Long-term debt consisted of the following at:
		December 31,
		2013			2012
		(In thousands)
	First Lien Credit Agreement (“Prior Credit Facility”)	$	74,898		$	75,719
	Other financing arrangements	315			549
	Less: current portion (Prior Credit Facility)	—			(821		)
	Less: current portion (Other financing arrangements)	(209		)	(209		)
	Total long-term debt	$	75,004		$	75,238
	Based on available market information, the estimated fair value of the Company’s long-term debt was $75.0 million and $76.6 million as of December 31, 2013 and December 31, 2012, respectively. These fair value measurements were determined using Level 2 observable inputs, as defined in Note 3. The estimated fair value of the Company’s other financing arrangements approximates the carrying value at each reporting period.
	Prior Credit Facility
	The Prior Credit Facility provided for term loans in the aggregate principal amount of $135.0 million. Each principal payment was due on the last day of each quarter, which commenced on September 30, 2007 with the balance due in a final installment on June 15, 2014. Additionally, the Prior Credit Facility included a requirement for mandatory prepayments based on annual excess free cash flow. Term loans under the First Lien Credit Agreement, as amended, bore interest at the higher of the Eurodollar Rate (as defined in the credit agreement) or 1.50%, plus 4.50% per annum. At December 31, 2013 and 2012, the interest rate on the Prior Credit Facility was 6.00% and 5.75%, respectively.
	The Prior Credit Facility limited annual consolidated capital expenditures, including amounts related to capitalized software, and restricted the ability to borrow against the revolving line of credit if a consolidated EBITDA ratio was not achieved. The agreement also contained other positive and negative covenants. The Company was in compliance with these covenants as of December 31, 2013 and 2012.
	In April 2011, in connection with the Company’s follow-on public offering, the Company received net proceeds of $34.6 million after deducting underwriting discounts and commissions. The Company used these proceeds to prepay $34.6 million of outstanding indebtedness on the Prior Credit Facility. The terms of the First Lien Credit Agreement required that any voluntary prepayment of the term loans to be applied on a pro rata basis to each scheduled installment of principal. As a result, the quarterly installment payment as of June 30, 2011 decreased from $0.34 million to $0.25 million for the remaining term of the loan.
	On April 6, 2012, the Company entered into Amendment No. 3 (the “Third Amendment”) to the Prior Credit Facility. The Third Amendment amended certain provisions of the Prior Credit Facility to, among other things, increase the capital expenditures limit from $21.0 million to $35.0 million per year, through the remainder of the term. As provided for in the Third Amendment, the Company prepaid $15.0 million of the outstanding balance on the Prior Credit Facility. As a result, the quarterly installment payment beginning June 30, 2012 decreased from $0.25 million to $0.21 million for the remaining term of the loan.
	The Prior Credit Facility also provided for a $15.0 million revolving line of credit, which expired on June 15, 2013. The obligations previously covered by the Company's revolving line of credit, which were primarily related to the Company's operating lease agreements for its various office locations, were replaced under a separate cash collateralized facility under which the Company originally provided the bank with $2.5 million and they provided certain of the Company's landlords with separate letters of credit for each location. The cash collateral balance is $2.4 million at December 31, 2013. This facility expires on June 3, 2014 and as such is classified as current restricted cash on the Company's Consolidated Balance Sheet.
	The Prior Credit Facility was secured by security interests and liens against all of the Company’s assets, including a pledge of 100% of the equity interests in its domestic subsidiaries and an obligation to pledge 65% of the equity interests in its direct foreign subsidiaries.
	Financing Costs
	Financing costs resulting from the original debt issuance, as well as the amendments to the First Lien Credit Agreement, were deferred and amortized over the remaining term of the loans using the effective interest method. As a result of the voluntary prepayment of $34.6 million on the Prior Credit Facility (using the proceeds from the April 2011 public offering of common stock), the amortization of $0.4 million of deferred financing costs was accelerated.
	Other Financing Arrangements
	In June 2011, the Company entered into a financing arrangement in the ordinary course of business, to purchase certain software and related services in the amount of $1.2 million, including financing costs of $0.1 million to be repaid over a 50 month period ending in July 2015. In December 2011, the Company entered into another financing arrangement in the ordinary course of business, to purchase support and maintenance for existing software licenses in the amount of $0.2 million repaid over a 25 month period ending in January 2014.
	In August 2012, the Company entered into a financing arrangement in the ordinary course of business, to purchase D&O insurance in the amount of $0.8 million of which $0.6 million was financed and repaid over the nine month period ended May 9, 2013.
	The following table summarizes the interest expense incurred on long-term debt:
		Years Ended December 31,
		2013			2012			2011
		(In thousands)
	Prior Credit Facility	$	4,618		$	4,863		$	6,100
	Interest Rate Swap (see Note 10)	—			1,515			4,570
	Other financing arrangements	35			32			8
	Total interest expense on long-term debt	$	4,653		$	6,410		$	10,678

Derivative_Financial_Instrumen

Derivative Financial Instrument	12 Months Ended
	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Financial Instrument	'
	Derivative Financial Instrument
	The Company’s interest rate swap agreement matured on June 30, 2012. The Company recognized a gain on the interest rate swap of $1.5 million for the year ended December 31, 2012, which is included in “Other expense (income), net” on the Consolidated Statement of Operations.
	In prior periods, the fair value of the interest rate swap was measured each reporting period and included a credit valuation adjustment that reflected consideration of the Company’s credit risk, since the interest rate swap was in a liability position. The Company recorded immaterial credit valuation adjustments during the years ended December 31, 2012 and 2011.
	The effects of derivative instruments on the Consolidated Statements of Operations were as follows:
		Years Ended December 31,
		2013		2012			2011
		(In thousands)
	Other expense (income), net	$	—	$	(1,455	)	$	(4,193	)

Common_Stock

Common Stock	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]	'
Common Stock	'
	Common Stock
	As of December 31, 2013, the Company had 300.0 million shares of common stock, par value $0.001 per share ("common stock"), authorized, with 56.1 million shares of common stock issued and outstanding. The number of authorized shares of common stock may be increased or decreased (but not below the number of shares then outstanding) by the affirmative vote of holders representing at least 75% in interest of the issued and outstanding shares of the Company's common stock.
	On August 5, 2010, the SEC declared effective the Company's registration statement on Form S-1, as amended (File No. 333-165991), in connection with its initial public offering of 11.0 million shares of common stock, at a public offering price of $13.00 per share. The offering closed on August 11, 2010. Upon consummation of the Company's initial public offering, all previously outstanding shares of the Company's Series A Preferred Stock converted to 35.1 million shares of common stock. On September 9, 2010, the Company closed the sale of an additional 1.0 million shares of common stock at the initial public offering price of $13.00 per share pursuant to the underwriters' exercise of their over-allotment option in connection with the Company's initial public offering that closed on August 11, 2010.
	On December 6, 2010, the SEC declared effective the Company's registration statement on Form S-1, as amended (File No.333-170694), in connection with its follow-on public offering of an additional 2.0 million shares of common stock at a public offering price of $20.00 per share.
	On April 6, 2011, the SEC declared effective the Company's registration statement on Form S-1, as amended (File No.333-173107), in connection with the Company's follow-on public offering of 1.3 million shares of common stock at a public offering price of $25.50 per share, with an overallotment option of an additional 0.2 million shares. The follow-on offering closed on April 12, 2011, pursuant to which a total of 1.4 million shares were issued, inclusive of the exercise of the overallotment option by the underwriters of 0.2 million shares.
	The Company used substantially all of the net proceeds of its initial public offering, including the sale of the underwriters' over-allotment shares, and the April 2011 follow-on offerings to repay a significant amount of its outstanding indebtedness (see Note 9).
	Entities affiliated with TA Associates, L.P. and Rho Capital Partners, Inc. hold 16.9 million shares of the Company's common stock and have the right to require the Company to register these shares under the Securities Act of 1933, as amended, pursuant to a registration rights agreement.

Employee_Stock_Plans

Employee Stock Plans	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Employee Stock Plans	'
	Employee Stock Plans
	Total stock-based compensation expense related to all of the Company’s stock awards was included in operating expense categories, as follows:
			Years Ended December 31,
			2013				2012			2011
			(In thousands)
	Cost of revenue		$	692			$	445		$	310
	Sales and marketing		1,320				1,080			2,353
	General and administrative		4,998				3,596			4,716
	Product development		1,276				1,440			1,329
	Total		$	8,286			$	6,561		$	8,708
	2007 Restricted Preferred Stock Plan
	The maximum number of restricted Series A Preferred shares authorized and issued under the 2007 Restricted Preferred Stock Plan was 2.0 million, all of which were granted on June 15, 2007 in conjunction with the Merger. At the closing of the Company's initial public offering, all outstanding shares of Series A Preferred Stock converted into shares of common stock, including unvested restricted Series A Preferred shares. At December 31, 2013, there were no shares of Series A Preferred Stock issued or outstanding.
	2007 Stock Option and Grant Plan
	The maximum number of shares of common stock initially reserved and available for issuance under the Company's 2007 Stock Option and Grant Plan was 4.0 million shares. Under the 2007 Stock Option and Grant Plan, the maximum number of shares increased by one share automatically for every share of restricted Series A Preferred issued under the 2007 Restricted Preferred Stock Plan that failed to vest and was canceled. On March 8, 2010, an additional 4.0 million shares of common stock were authorized for issuance under the 2007 Stock Option and Grant Plan, increasing the number of shares of common stock authorized for issuance to 8.0 million. Effective upon the adoption of the Company's 2010 Equity Incentive Plan, the Company's board of directors determined not to grant any further awards under the 2007 Stock Option and Grant Plan and the shares of common stock that remained available for future awards under the 2007 Stock Option and Grant Plan have been reserved for issuance under the 2010 Equity Incentive Plan.
	2010 Equity Incentive Plan
	The 2010 Equity Incentive Plan was adopted by the Company's board of directors in March 2010 and approved by its stockholders in July 2010. The 2010 Equity Incentive Plan permits the Company to make grants of stock options (both incentive stock options and non-qualified stock options), stock appreciation rights, restricted stock, restricted stock units, unrestricted stock, cash-based awards, performance shares and dividend equivalent rights to its executives, employees, non-employee directors and consultants. The number of shares of common stock reserved and available for issuance under the 2010 Equity Incentive Plan is 7.8 million which is the sum of 3.3 million shares of stock reserved under the plan on the effective date and 4.5 million additional shares approved in July 2012. Generally, shares that are forfeited or canceled from awards under the 2010 Equity Incentive Plan, the 2007 Stock Option and Grant Plan and the 2007 Restricted Preferred Stock Plan also will be available for future awards under the 2010 Equity Incentive Plan. In May 2012, the Company's board of directors adopted a U.K. sub plan to the 2010 Equity Incentive Plan, which was subsequently approved by the HM Revenue and Customs in November 2012. The U.K. sub plan provides for the issuance to U.K. residents of options to acquire shares of the Company's common stock. Further, the U.K. sub plan provides that if recipients exercise their options in an approved manner that meets the requirements of the U.K. sub plan, they will receive favorable tax treatment.
	On July 27, 2012, the Company filed a registration statement on Form S-8 (File No.333-182912) that relates to an additional 4.5 million shares of common stock issuable pursuant to the Company's 2010 Equity Incentive Plan.
	The following table summarizes the weighted average values of the assumptions used in the Black-Scholes pricing model to estimate the fair value of the options granted during the period presented:
			Years Ended December 31,
			2013		2012		2011
	Expected volatility		52.10%		59.10%		57.70%
	Expected life of option		6.09 years		6.09 years		6.06 years
	Risk free interest rate		1.30%		0.90%		1.60%
	Expected dividend yield		0.00%		0.00%		0.00%
	The following table summarizes stock option activity for the year ended December 31, 2013:
			Shares			Weighted Average Exercise Price
	Outstanding at December 31, 2012		5,541,130			$	6.8
	Granted		857,000			7.08
	Exercised		(300,301	)		5.37
	Forfeited		(887,445	)		7.91
	Outstanding at December 31, 2013		5,210,384			$	6.74
	The following table contains additional information with respect to options outstanding and exercisable at December 31, 2013:
			Options Outstanding					Options Exercisable
			Number of			Remaining		Number Exercisable		Remaining Weighted Average Life
			Options Outstanding			Weighted
						Average Life
	Exercise Prices:
	$1.59 - $4.73		1,739,141			7.63 years		891,890		6.73 years
	$5.14 - $7.66		2,766,672			8.21 years		1,090,281		7.90 years
	$8.11 - $10.50		243,500			9.76 years		—		0.00 years
	$13.00 - $25.89		461,071			6.87 years		330,385		6.85 years
			5,210,384					2,312,556
	At December 31, 2013, the aggregate intrinsic value of stock options outstanding and exercisable was $31.0 million and $14.1 million, respectively. At December 31, 2012, the aggregate intrinsic value of stock options outstanding and exercisable was $5.1 million and $1.8 million, respectively. The intrinsic value for stock options is calculated based on the exercise price of the underlying awards and the share price of such awards as of each respective period-end date.
	The following table summarizes non-vested stock option activity for the year ended December 31, 2013:
			Shares			Weighted Average Grant Date Fair Value
	Non-vested options outstanding at December 31, 2012		3,816,020			$	3.6
	Granted		857,000			3.55
	Vested		(1,382,509	)		3.59
	Forfeited		(392,683	)		3.8
	Non-vested options outstanding at December 31, 2013		2,897,828			$	3.52
	The following table provides additional information pertaining to the Company's stock options:
		Years Ended December 31,
		2013				2012			2011
	Weighted average grant date fair value for options granted during the period	$	3.55			$	2.68		$	7.03
	Total fair value of options vested (in thousands)	$	4,968			$	5,968		$	4,752
	The intrinsic value of options exercised for the years ended December 31, 2013 and 2012, was $1.0 million and $1.5 million, respectively.
	At December 31, 2013 and 2012, there was $9.2 million and $12.4 million, respectively, of total unrecognized compensation cost related to non-vested stock options, net of estimated forfeitures, which is expected to be recognized over a weighted average period of 2.69 years and 3.41 years, respectively. Stock-based compensation expense for the Company's stock options under the 2007 Stock Option and Grant Plan and 2010 Equity Incentive Plan during the years ended December 31, 2013, 2012 and 2011 was $4.8 million, $3.9 million and $6.1 million, respectively.
	Restricted Stock Awards (“RSAs”)
	Information concerning RSA’s outstanding under the 2010 Equity Incentive Plan is as follows:
			Shares			Weighted Average Grant Date Fair Value
	Non-vested shares at December 31, 2012		625,800			$	4.35
	Granted		76,167			9.19
	Vested and exchanged for common stock		(143,985	)		5.21
Non-vested shares at December 31, 2013		557,982			$	4.79
For the year ended December 31, 2013, 2012 and 2011, the weighted-average grant date fair value for RSAs was $9.19, $4.24 and $17.81, respectively. The fair value of RSAs vested was $0.7 million, $0.9 million and $1.5 million, respectively, during the same periods.
The aggregate intrinsic value of RSAs outstanding at December 31, 2013 and 2012 was $6.8 million and $3.9 million, respectively. The intrinsic value for RSAs is calculated based on the market price of the Company’s stock as of each period-end date.
At December 31, 2013 and 2012, there was $1.2 million and $1.9 million, respectively, of total unrecognized compensation cost related to non-vested RSAs, net of estimated forfeitures, that is expected to be recognized over a weighted average period of 2.73 years and 2.51 years, respectively. Stock-based compensation expense for the Company’s RSAs granted under the 2007 Stock Option and Grant Plan and 2010 Equity Incentive Plan during the years ended December 31, 2013, 2012 and 2011 was $1.5 million, $1.5 million and $1.4 million, respectively.
On February 1, 2012, the Company granted 0.5 million restricted shares of common stock to its Chief Executive Officer, Ronald W. Hovsepian, pursuant to his employment agreement. Vesting of this award is based upon the achievement of specified stock performance and service thresholds. The Company performed a Monte-Carlo simulation to calculate the award’s fair value of $2.1 million and derived service period of 3.8 years. The assumptions used to perform the Monte-Carlo simulation were consistent with those utilized in the Company’s Black-Scholes valuations for stock options, specifically: expected volatility of 60.32%, risk-free interest rate of return of 0.72% and a dividend yield of 0.0%. During the year ended December 31, 2013, the Company incurred $0.7 million of stock-based compensation expense related to this award.
Restricted Stock Units (“RSUs”)
The following table summarizes RSU activity for the year ended December 31, 2013:
		Shares			Weighted Average Grant Date Fair Value
Non-vested shares at December 31, 2012		446,456			$	7.34
Granted		1,015,212			7.36
Vested and issued		(164,828	)		8.98
Forfeited		(98,550	)		5.93
Non-vested shares at December 31, 2013		1,198,290			$	7.24
For the years ended December 31, 2013, 2012 and 2011, the weighted-average grant date fair value for RSUs was $7.36, $4.70 and $14.72, respectively. The fair value of RSUs vested was $1.5 million, $1.1 million, and $0.6 million, respectively, during the same periods.
The aggregate intrinsic value of RSUs outstanding at December 31, 2013 and 2012 was $14.5 million and $2.8 million, respectively. The intrinsic value for RSUs is calculated based on the market price of the Company's stock as of each period-end date.
At December 31, 2013 and 2012, there was $7.0 million and $2.3 million, respectively, of total unrecognized compensation cost related to non-vested RSUs, net of estimated forfeitures, which is expected to be recognized over a weighted average period of 3.20 years and 3.70 years, respectively. Stock-based compensation expense for the Company’s RSUs granted under the 2010 Equity Incentive Plan, during the years ended December 31, 2013, 2012 and 2011 was $2.0 million, $1.0 million and $0.9 million, respectively.
Modification of Awards
During the year ended December 31, 2013, no awards were modified.
During the year ended December 31, 2012, pursuant to separation agreements for three executives, the Company extended the vesting terms for certain outstanding equity awards beyond the individuals’ separation dates, resulting in modification of the awards for accounting purposes. As a result of the extended vesting terms and re-measurement of the modified awards, the Company recorded an additional $0.8 million in stock-based compensation expense. In addition, the Company reversed $1.4 million of stock-based compensation expense related to the forfeiture of unvested options by two of the three executives previously referenced.
2010 Employee Stock Purchase Plan
The 2010 Employee Stock Purchase Plan (the “2010 ESPP”) was adopted by the Company's board of directors and approved by its stockholders in July 2010. As originally adopted in 2010, a maximum of 400,000 shares of the Company's common stock had been reserved for issuance under the 2010 ESPP. Due to the limited number of shares available for purchase under the 2010 ESPP participation in the plan was suspended for the second quarter of 2013. At the annual meeting on August 9, 2013, an amendment to increase the shares available for purchase to 1,000,000 was approved by the shareholders and the Company reopened participation in the plan for the third quarter of 2013.
The Company makes one or more offerings each year to its employees to purchase stock under the 2010 ESPP, usually beginning on the first business day of the quarter and ending on the last business day of the quarter. For employees eligible to participate on the first date of an offering period, the purchase price of shares of common stock under the ESPP is 85% of the fair market value of the shares, either on the offering date or the exercise date, whichever is less. As of December 31, 2013, there are 1,000,000 shares of common stock reserved, 420,627 shares issued and 579,373 shares available for future issuance under the ESPP.
Stock-based compensation expense related to the Company's 2010 ESPP for the years ended December 31, 2013, 2012, and 2011 was $0.04 million, $0.2 million and $0.4 million, respectively.

Net_Loss_Income_Per_Share

Net (Loss) Income Per Share	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Net (Loss) Income per Share	'
	Net Loss per Share
	The following table provides a reconciliation of the numerator and denominator used in computing basic and diluted net loss per common share:
		Years Ended December 31,
		2013				2012			2011
	Numerator:
	Net loss (in thousands)	$	(15,278	)		$	(17,380	)	$	(1,243	)
	Denominator:
	Basic shares:
	Weighted-average common shares outstanding	55,135,657				54,352,536			53,381,655
	Diluted shares:
	Weighted-average shares used to compute basic net loss income per share	55,135,657				54,352,536			53,381,655
	Effect of potentially dilutive securities:
	Options to purchase common stock	—				—			—
	Unvested shares of restricted stock awards	—				—			—
	Unvested shares of restricted stock units	—				—			—
	Weighted-average shares used to compute diluted net income loss per share	55,135,657				54,352,536			53,381,655
	Net loss per share:
	Basic	$	(0.28	)		$	(0.32	)	$	(0.02	)
	Diluted	$	(0.28	)		$	(0.32	)	$	(0.02	)
	The following outstanding options, non-vested RSAs and non-vested RSUs were excluded from the computation of diluted net loss per share for the periods presented as their effect would have been antidilutive:
		Years Ended December 31,
		2013			2012			2011
	Options to purchase common stock	5,210,384			5,541,130			4,817,748
	Unvested shares of restricted stock awards	557,982			625,800			72,985
	Unvested shares of restricted stock units	1,198,290			446,456			222,774

Segment_and_Geographic_Informa

Segment and Geographic Information	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Segment and Geographic Information	'
	Segment and Geographic Information
	The Company is a single operating segment. The Company's chief operating decision maker reviews financial information presented on a consolidated basis, accompanied by certain revenue metrics and trends by the following principal markets:
	•	Mergers & Acquisitions ("M&A") comprises customers spanning a variety of industries, including financial services, pharmaceutical, biotechnology, consumer, energy, industrial, legal, insurance, real estate and technology, who use Intralinks exchanges for project-based transactions, such as mergers, acquisitions and dispositions. These customers are typically referred to the Company by financial or legal advisors involved in the respective transactions. This principal market is generally characterized by the use of the Intralinks Platform.
	•	Enterprise comprises customers spanning a variety of industries described above, who use the Intralinks Platform for a wide range of corporate purposes.
	•	Debt Capital Markets ("DCM") primarily comprises customers within the financial services industry who use Intralinks exchanges for loan syndication and administration, and is generally characterized by the use of the Intralinks Platform.
	The following table sets forth the Company's revenue by principal market:
			Years Ended December 31,
			2013		2012		2011
			(In thousands)
	M&A		$	110,456	$	91,606	$	83,763
	Enterprise		95,246		94,616		94,588
	DCM		28,794		30,445		34,539
	Other revenue		—		—		614
	Total revenue		$	234,496	$	216,667	$	213,504
	Revenue by geographic location is based on where the customer is located. Revenue and long-lived assets by geographic location are as follows:
			Years Ended December 31,
			2013		2012		2011
			(In thousands)
	Revenue:
	U.S.		$	137,603	$	131,487	$	128,404
	All other countries		96,893		85,180		85,100
	Total		$	234,496	$	216,667	$	213,504
			Years Ended December 31,
			2013		2012
			(In thousands)
	Long-lived assets (excluding goodwill and intangible assets):
	U.S.		$	45,702	$	36,372
	All other countries		740		645
	Total		$	46,442	$	37,017
	Concentration of Credit Risk and Significant Customers
	The Company operates globally with 58.7% of total revenues derived from customers located in the U.S. and the remaining 41.3% derived from customers located in various international locations. Revenue derived from customers located in the U.K. during the years ended December 31, 2013, 2012 and 2011 was $31.1 million, $25.4 million and $27.8 million, or 13.2%, 11.7% and 13.0% of total revenue, respectively. No other individual foreign country accounted for more than 10% of the Company's revenue during these periods and no individual foreign country accounted for more than 10% of the Company's accounts receivable at December 31, 2013, 2012 and 2011.
	No individual customer accounted for more than 10% of the Company's revenue in the years ended December 31, 2013, 2012 and 2011.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2013
Related Party Transaction, Due from (to) Related Party [Abstract]	'
Related Party Transactions	'
	Related Party Transactions
	Affiliates of one of our largest shareholders, TA Associates, L.P. (which is now part of TA Associates Management, L.P.) are also customers of the Company. These affiliates made payments to the Company in connection with their purchase of its services using the Intralinks platform. Revenue generated from TA Associates, L.P. and its affiliates for the years ended December 31, 2013 and 2012 totaled $0.2 million and $0.2 million. There were no amounts due from TA Associates, L.P. at December 31, 2013.
	On April 27, 2011, the Company’s board of directors elected J. Chris Scalet as a Class I director of the Company. Mr. Scalet served as Executive Vice President, Global Services and Chief Information Officer of Merck & Co., Inc. (“Merck”), a global research-driven pharmaceutical company, until his retirement on July 2, 2012. Affiliates of Merck are customers of the Company in the ordinary course of business. Revenue generated from Merck and its affiliates for the year ended December 31, 2012 totaled $2.9 million. At December 31, 2012, amounts due from Merck and its affiliates were nominal. At December 31, 2013, Merck was no longer a related party.

Commitments_and_Contigencies

Commitments and Contigencies	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments And Contingencies	'
	Commitments and Contingencies
	Operating Leases
	The Company has entered into operating agreements for office space. Rent is amortized on a straight-line basis over the applicable lease terms. Deferred rent at December 31, 2013 was $3.6 million.
	Future minimum payments under operating leases for the next five years and thereafter are as follows:
	Years Ending December 31,	Amount
		(In thousands)
	2014	$	4,247
	2015	3,836
	2016	2,720
	2017	2,690
	2018	2,566
	Thereafter	6,366
	Total	$	22,425
	Total facilities expenses charged to operations for the years ended December 31, 2013, 2012 and 2011 was $5.5 million, $6.3 million and $5.4 million, respectively.
	The Company's principal executive office located at 150 East 42nd Street, New York, New York occupies 43,304 square feet which is subject to a lease agreement that expires in July 2021. The lease began in August 2011, has a ten year term and provided for 12 months of initial free rent and an allowance from the landlord to be used for office improvements and certain other payments of $1.9 million. As of December 31, 2013, the Company received $1.1 million of reimbursed landlord leasehold improvements. In addition, we have a facility in Charlestown, Massachusetts that occupies 36,557 square feet under a lease that expires in December 2015.
	The Company also maintains space in Amsterdam, London, Paris, Chicago, São Paulo, Frankfurt, Singapore, Tokyo, Hong Kong, Sydney, Miami and San Francisco for its sales and services activities. The Company believes that its facilities are adequate for its current needs. However, the Company may obtain additional office space to house additional services personnel in the near future, and it may require other additional office space as its business grows.
	Legal Proceedings
	In the ordinary course of business, the Company and its subsidiaries are subject to various claims, charges, disputes, litigation and regulatory inquiries and investigations. These matters, if resolved adversely against the Company, may result in monetary damages, fines and penalties or require changes in business practices. The Company is not currently aware of any pending or threatened material claims, charges, disputes, litigation and regulatory inquiries and investigations except as follows:
	Securities Class Action. On December 5, 2011, the Company became aware of a purported class action lawsuit filed in the U.S. District Court for the Southern District of New York (the "SDNY" or the "Court") against the Company and certain of its current and former executive officers. The initial complaint (the "Wallace Complaint") alleges that the defendants made false and misleading statements or omissions about the Company’s business prospects, financial condition and performance in violation of the Securities Exchange Act of 1934, as amended. The plaintiff seeks unspecified compensatory damages for the purported class of purchasers of the Company's common stock during the period from February 17, 2011 through November 10, 2011 (the "Allegation Period"). On December 27, 2011, a second purported class action complaint, which makes substantially the same claims as, and is related to, the Wallace Complaint, was filed in the SDNY against the Company and certain of its current and former executive officers seeking similar unspecified compensatory damages for the Allegation Period. On April 3, 2012, the Court consolidated the actions and appointed Plumbers and Pipefitters National Pension Fund as lead plaintiff, and also appointed lead counsel in the consolidated action ("Consolidated Class Action"). On June 15, 2012, the lead plaintiff filed an amended complaint (“Consolidated Class Action Complaint”), that in addition to the original allegations made in the Wallace Complaint, alleges that the Company, certain of its current and former officers and directors, and the underwriters in Intralinks’ April 6, 2011 stock offering issued a registration statement and prospectus in connection with the offering that contained untrue statements of material fact or omitted material information required to be stated therein in violation of the Securities Act of 1933, as amended. The defendants filed their motions to dismiss on July 31, 2012. On May 8, 2013, the Court issued an opinion dismissing claims based on certain allegations in the complaint, but otherwise denied defendants' motions to dismiss. On June 28, 2013, defendants filed their answers to the Consolidated Class Action Complaint. On October 15, 2013, the Court entered the parties’ pretrial scheduling stipulation, which provided, inter alia, that the parties would fully brief any motions for summary judgment by February 17, 2015. In December 2013, the parties served each other with document requests and discovery is ongoing. On February 18, 2014, lead plaintiff filed its motion for class certification.  Pursuant to the October 15, 2013 scheduling order, the defendants’ opposition to class certification is due by May 2, 2014, and lead plaintiff’s reply is due by June 2, 2014. The Company believes that these claims are without merit and intends to defend these lawsuits vigorously.
	Dixon Derivative Action. On December 28, 2011, a shareholder derivative complaint was filed in the SDNY against the Company and certain of its current and former directors. The complaint (the "Dixon Action") alleged that the defendants breached their fiduciary duties by causing the Company to issue materially false and misleading statements about the Company's business prospects, financial condition and performance during the same Allegation Period alleged in the Consolidated Class Action Complaint. Plaintiff has voluntarily dismissed the Dixon Action without receipt of any compensation. On January 28, 2014, the Court approved the stipulation of dismissal.
	Horbal Derivative Action. On April 16, 2012, a second shareholder derivative complaint (the "Horbal Action") was filed in the Supreme Court of the State of New York in New York County ("New York State Court") against the Company and certain of its current and former directors and officers. The Horbal Action makes substantially the same claims as, and is related to, the Dixon Action. On April 24, 2012, one of the director defendants removed the Horbal Action to the SDNY, and on May 7, 2012, it was assigned to the same judge as in the Dixon Action. On May 22, 2012, the plaintiff in the Horbal Action moved to remand the case to New York State Court. On March 11, 2013, the SDNY granted plaintiff's motion to remand, and the case is currently pending in New York State Court. On June 6, 2013, the parties filed a stipulation with the New York State Court agreeing to stay all proceedings in the Horbal Action, including discovery, until ninety days after the SDNY issues a scheduling order in the Consolidated Class Action. On January 13, 2014, the parties filed a stipulation with the New York State Court agreeing to work together on a schedule for defendants’ time to answer, move against or otherwise respond to the complaint or an amended complaint. The Company believes the claims in the Horbal Action are without merit and intends to defend this lawsuit vigorously.
	Levine Shareholder Demand Letter/Complaint. The Company received a shareholder demand letter, dated May 16, 2013, demanding that the Company's Board take action to remedy alleged breaches of fiduciary duty by current and former directors and officers of the Company. These alleged breaches are based on the same alleged misconduct in the complaints in the Dixon, Horbal, and Consolidated Class Actions. The letter specifically demands that the Company's Board undertake an independent internal investigation into the alleged breaches and commence a civil action against each of the allegedly breaching current and former directors and officers. On June 26, 2013, the Company's Board created a Demand Committee to conduct an investigation into the allegations in the Levine demand letter. On December 13, 2013, the shareholder filed a derivative complaint (the “Levine Action”) in New York State Court against the Company and certain of its current and former directors and officers. The Levine Action alleges that since the Company’s Board has not responded substantively to the shareholder’s demand letter in over six months, this has resulted in an improper “functional refusal” of the demand. The Levine Action makes substantially the same claims as, and is related to, the Dixon, Horbal, and Consolidated Class Actions. It alleges, among other things, that the defendants breached their fiduciary duties by making materially false and misleading statements related to the strength of the Company’s business and customer satisfaction. The Company believes the claims in the Levine Action are without merit and intends to defend this lawsuit vigorously.

Schedule_II_Valudation_and_Qua

Schedule II - Valudation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]	'
Schedule II - Valuation and Qualifying Accounts	'
	SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
	(In Thousands)
		Balance at Beginning of Period		Additions Charged to Expenses/Against Revenue		Deductions			Balance at
									End of Period
	Year ended December 31, 2013
	Allowance for doubtful accounts	$	1,502	$	1,028	$	(1,278	)	$	1,252
	Credit reserve	1,425		6,694		(6,219		)	1,900
	Total	$	2,927	$	7,722	$	(7,497	)	$	3,152
	Year ended December 31, 2012
	Allowance for doubtful accounts	$	724	$	1,713	$	(935	)	$	1,502
	Credit reserve	1,425		6,348		(6,348		)	1,425
	Total	$	2,149	$	8,061	$	(7,283	)	$	2,927
	Year ended December 31, 2011
	Allowance for doubtful accounts	$	581	$	1,344	$	(1,201	)	$	724
	Credit reserve	1,837		3,933		(4,345		)	1,425
	Total	$	2,418	$	5,277	$	(5,546	)	$	2,149

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	On February 24, 2014, the Company entered into an $80 million, 5-year term loan B credit agreement. The term loan bears interest at LIBOR, with a 2.00% floor plus 5.25% per annum, for an effective interest rate of 7.25%. There is a 0.25% principal payment due on the last day of each quarter, commencing on June 30, 2014, with a balance due in a final installment on February 24, 2019. In connection with the term loan agreement the lenders have provided for a $10.0 million asset-based revolving line of credit. The Company must comply with various covenants the breach of which could result in a termination event.
	The debt will provide the Company with additional financial flexibility to fund working capital, and discretionary investments, along with organic and inorganic growth initiatives, including strategic acquisitions.
	The occurrence of this subsequent event is evidence of the Company's intent and ability to refinance on a long-term basis. As such, the Company reclassified the existing debt balance as of December 31, 2013 as long-term debt, in accordance with accounting rules prescribed in ASC 470-10.
	On March 11, 2014, the Company entered into an operating lease to occupy 51,325 square feet of office space in Waltham, Massachusetts. The term of the lease is ten years and three months. The fixed base rent for the premises during years one through five of the lease term is $1.7 million per annum, payable monthly and the fixed base rent for the premises during years six through the end of the lease term is $1.8 million per annum, paid monthly.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Principles of Consolidation	'
	Principles of Consolidation - The accompanying Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries, prepared in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP"). All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	'
	Use of Estimates - The preparation of Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements and the reported amounts of revenue and expenses during the reporting period.
	Significant estimates and assumptions made by management include the determination of the fair value of stock options and estimated forfeitures of equity-based awards, fair value of the Company's reporting unit, valuation of intangible assets (and their related useful lives), fair value of financial instruments, certain components of the income tax provisions, including valuation allowances on the Company's deferred tax assets, accruals for certain compensation expenses, allowances for doubtful accounts and reserves for customer credits. The Company bases estimates and assumptions on historical experience and on various other factors that it believes to be reasonable under the circumstances. The Company evaluates its estimates and assumptions on an ongoing basis. Actual results could differ from those estimates.
	Out-of-period Adjustments - During the financial statement close process for the three months ended June 30, 2013, the Company identified a prior period error totaling $0.8 million, which was corrected and recorded as a cumulative adjustment to long-term deferred tax assets within the Consolidated Balance Sheet at June 30, 2013, and was reflected as an income tax expense within the Consolidated Statement of Operations for the three and six months ended June 30, 2013. The Company does not believe that this adjustment is material to the Consolidated Financial Statements for any prior period or to the 2013 results.
	During the financial statement close process for the three months ended March 31, 2012, the Company identified a prior period error totaling $0.8 million, which was corrected and recorded as a cumulative adjustment to long-term deferred tax assets within the Consolidated Balance Sheet at March 31, 2012, and was reflected as an income tax benefit within the Consolidated Statement of Operations for the three months ended March 31, 2012. The Company does not believe that this adjustment is material to the Consolidated Financial Statements for any prior period or to the 2012 results.
Revenue Recognition	'
	Revenue Recognition - The Company derives revenue principally through fixed commitment contracts under which the Company provides customers various services, including access to the cloud-based Intralinks Platform, including Intralinks exchanges and Intralinks VIA, as well as the related customer support and other services. The Company's customers do not have a contractual right, or the ability, to take possession of the Intralinks software at any time during the hosting period, or contract with an unrelated third party to host the Intralinks software. Therefore, revenue recognition for the Company's services is not accounted for under specific guidance of the Financial Accounting Standards Board ("FASB") on software revenue recognition. The Company recognizes revenue for its services ratably over the contracted service period, provided that there is persuasive evidence of an arrangement; the service has been provided to the customer; collection is reasonably assured; the amount of fees to be paid by the customer is fixed or determinable; and the Company has no significant remaining obligation at the completion of the contracted term. In circumstances where the Company has a significant remaining obligation after completion of the initial contract term, revenue is recognized ratably over the extended service period. The Company's contracts do not contain general rights of return.
	From time to time, the Company agrees to sales concessions with its customers a reserve for which is estimated based on historical patterns of actual credits issued. Expenses associated with maintaining this reserve are recorded as a reduction to revenue, which the Company believes represents an accurate reflection of the underlying business activity for each reporting period and is in line with the requirement that all revenue recognized during the period is earned and realizable.
	The Company offers services to customers through single-element and multiple-element arrangements, some of which contain offerings for optional services, including document scanning, data archiving and other professional services. In accordance with the FASB's guidance on multiple-deliverable arrangements, the Company has evaluated the deliverables in its arrangements to determine whether they represent separate units of accounting, specifically whether the deliverables have value to the Company's customers on a standalone basis. The Company has determined that the services delivered to customers under its existing arrangements generally represent a single unit of accounting. Revenue for optional services is recognized as delivered, or as completed, provided that the general revenue recognition criteria described above are met. The Company continues to evaluate the nature of the services offered to customers under its fixed commitment contracts, as well as its pricing practices, to determine if a change in policy regarding multiple-element arrangements and related disclosures is warranted in future periods.
	Additionally, certain of the Company's customer contracts contain provisions for set-up and implementation services relating to the customer's use of the Intralinks Platform. The Company believes that these set-up and implementation services provide value to the customer over the entire period that the exchange is active, including renewal periods, and therefore the revenue related to these set-up types of services are recognized over the longer of the contract term or the estimated relationship life which, as of December 31, 2013, generally ranged from two to four years. The Company will continue to evaluate the length of the amortization period of the revenue related to set up and implementation fees to determine if a change in estimate is warranted in future periods.
	Other Revenues - On November 25, 2008, one of the Company's primary facilities sustained water damage from a fire on a floor above, resulting in an interruption to the Company's operations. The Company filed a claim under its business interruption insurance policy for lost revenue caused by the down-time experienced subsequent to the loss event. The Company received insurance proceeds totaling $0.6 million during the year ended December 31, 2011, in response to its business interruption claim. Business interruption insurance proceeds are classified as "Other revenue" in the Consolidated Statement of Operations for the year ended December 31, 2011.
	Allowance for Doubtful Accounts - The Company evaluates the adequacy of the allowance for doubtful accounts on a quarterly basis. This evaluation includes historical loss experience, length of time receivables are past due, adverse situations that may affect a customer's ability to pay its obligation to the Company and prevailing market conditions. This evaluation is inherently subjective and the Company may revise its estimates as more information becomes available.
Deferred Revenue	'
	Deferred Revenue - Deferred revenue represents the billed but unearned portion of existing contracts for services to be provided. Deferred revenue does not include the unbilled portion of existing contractual commitments of the Company's customers. Accordingly, the deferred revenue balance does not represent the total contract value of outstanding arrangements. However, amounts that have been invoiced are recorded as revenue or deferred revenue, as appropriate, and are included in the Company's accounts receivable balances. Deferred revenue that will be recognized during the subsequent 12-month period is classified as "Deferred revenue" with the remaining portion as non-current deferred revenue as a component of "Other long-term liabilities" on the Consolidated Balance Sheets.
Stock-based Compensation	'
	Stock-Based Compensation - The Company uses the Black-Scholes option pricing model to determine the fair value of options granted under its 2007 Stock Option and Grant Plan and the 2010 Equity Incentive Plan, as well as the rights awarded under its 2010 Employee Stock Purchase Plan, or ESPP. Using this model, fair value is calculated based on assumptions with respect to (i) expected volatility of the Company's common stock price, (ii) the expected life of the award, which for options is the period of time over which equity recipients are expected to hold their options prior to exercise and for ESPP rights is the period of time between the offering date and the exercise date (as defined in Note 12), (iii) expected dividend yield on the Company's common stock, and (iv) a risk-free interest rate, which is based on quoted U.S. Treasury rates for securities with maturities approximating the expected term. The use of different assumptions in the Black-Scholes pricing model would result in different amounts of stock-based compensation expense. Furthermore, if different assumptions are used in future periods, stock-based compensation expense could be materially impacted in the future.
	The fair value of restricted shares of common stock, or RSAs, and restricted stock units, or RSUs, is generally determined using the intrinsic value of the Company's common stock at the time of grant, with the exception of the 0.5 million performance based RSAs issued to the Company's Chief Executive Officer on February 1, 2012. The fair value of the performance based RSAs was determined using a Monte-Carlo simulation.
	The Company does not have a significant history of market prices, and as such, the Company estimates volatility in accordance with Securities and Exchange Commission Staff Accounting Bulletin Topic 14 D.1, using historical volatilities of similar public companies. The Company based its analysis of expected volatility on reported data for a peer group of companies within the Company's industry, using an average of the historical volatility measures of this peer group of companies. The Company intends to continue to consistently apply this process using the same or similar entities until a sufficient amount of historical information regarding the volatility of its own stock price becomes available, or unless circumstances change such that the identified entities are no longer similar to the Company, in which case, the Company would select and use in the calculation publicly available share price information for more suitable entities. Once a sufficient amount of historical information regarding the volatility of the Company's share price becomes available, the Company will utilize the closing prices of its publicly-traded common stock to determine its volatility. The expected life of options has been determined using the "simplified" method, which uses the midpoint between the vesting date and the end of the contractual term. The Company utilizes the simplified method of determining the expected life of options due to the limited period of time its common stock has been publicly traded, thus resulting in a lack of sufficient historical exercise data in a publicly traded environment to provide a reasonable basis upon which to estimate expected term. The Company intends to continue to consistently apply the simplified method until a sufficient amount of historical information regarding exercise data in a publicly traded environment becomes available. The risk-free interest rate is based on quoted U.S. Treasury rates for securities with maturities approximating the awards' expected term. The expected dividend yield is zero as the Company never paid dividends and does not currently anticipate paying any in the foreseeable future.
	Stocked-based compensation expense for stock options is recorded over the requisite service period, less estimated forfeitures. For grants of RSAs and RSUs, the Company records stock-based compensation expense based on the fair value of the shares on the grant date over the requisite service period, less estimated forfeitures. Stock-based compensation expense for ESPP rights is recorded in line with each respective offering period.
	The Company utilizes an estimated forfeiture rate when calculating expense for the period. The Company considers several factors when estimating future forfeitures, including types of awards, employee level and historical experience. If this estimated rate changes in future periods due to different actual forfeitures, the Company's stock-based compensation expense may increase or decrease significantly. If there are any modifications or cancellations of the underlying unvested securities or the terms of the awards, the Company may be required to accelerate, increase or cancel any remaining unamortized stock-based compensation.
Sales Commissions	'
	Sales Commissions - Commissions payable to the Company's sales staff are expensed in the period the related sales efforts are performed. Sales commission expense was $17.0 million, $13.4 million and $13.2 million, respectively, for the years ended December 31, 2013, 2012 and 2011 and are included within "Sales and marketing" in the Consolidated Statements of Operations.
Advertising	'
	Advertising - The Company expenses the cost for producing and communicating advertising and promoting its services when incurred.
Income Taxes	'
	Income Taxes - The Company accounts for income taxes on the asset and liability method pursuant to ASC 740, Income Taxes. Under this method, deferred income tax assets and liabilities are recognized for the future tax consequences of differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, as well as net operating loss and tax credit carryforwards. Deferred income taxes are measured using enacted tax rates expected to be applied to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred income taxes of a change in tax rates is recognized in results of operations in the period that includes the enactment date.
	Each reporting period, the Company assesses whether its deferred income tax assets are more-likely-than-not realizable, in determining whether it is necessary to record a valuation allowance. This includes evaluating both positive (e.g., sources of taxable income) and negative (e.g., recent historical losses) evidence that could impact the realizability of the Company's deferred income tax assets.
	The Company recognizes the impact of an uncertain tax position in its financial statements if, in management's judgment, the position is more-likely-than-not sustainable upon audit based on the position's technical merits. This involves the identification of potential uncertain tax positions, the evaluation of applicable income tax laws and measurement of the amount of each uncertain tax position that is more-likely-than-not sustainable. The Company operates within multiple taxing jurisdictions and is subject to audit in each of these jurisdictions. The Company recognizes interest expense and penalties on uncertain tax positions as part of income tax expense.
Net Loss Per Share	'
	Net Loss Per Share - Basic loss per share is computed using net loss and the weighted average number of common shares outstanding. Diluted loss per share reflects the weighted average number of shares of common stock outstanding plus any potentially dilutive shares outstanding during the period. Potentially dilutive shares consist of shares issuable upon the exercise of stock options and unvested shares of restricted common stock (using the treasury stock method) and conversion of preferred shares (using the as converted method). Common equivalent shares are excluded from the diluted computation if their effect is anti-dilutive.
Foreign Currency Transactions and Translations	'
	Foreign Currency Translation and Transactions - The functional currencies of the Company's foreign operations are the local currencies in each of the foreign subsidiary locations. Assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenue and expenses denominated in a foreign currency are translated into U.S. dollars on a monthly basis at the average exchange rate during the period. Adjustments resulting from translating foreign currency financial statements into U.S. dollars are recorded in "Accumulated other comprehensive loss" as a separate component of shareholders' equity within the Consolidated Balance Sheets. Foreign currency transaction gains and losses resulting from assets and liabilities denominated in a currency other than the subsidiary's local currency are reported in the Consolidated Statements of Operations as a component of "Other expense (income), net." For the years ended December 31, 2013, 2012 and 2011, foreign currency transaction losses (gains) were $0.3 million, $(0.3) million and $0.9 million, respectively
Comprehensive Loss	'
	Comprehensive Loss - Comprehensive loss consists of net loss and other comprehensive loss. Other comprehensive loss includes certain changes in stockholders' equity that are excluded from net loss, specifically cumulative foreign currency translation adjustments. Comprehensive loss has previously been reflected in the Consolidated Statements of Changes in Stockholders' Equity and is now reflected in the Consolidated Statements of Comprehensive Loss.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents - The Company considers all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents consist of cash on deposit with banks, money market funds and certain investments in commercial paper.
Investments	'
	Investments - The Company's investment portfolio may at any time contain investments in U.S Treasury obligations, securities guaranteed by the U.S. government, certificates of deposit, corporate notes and bonds, medium-term notes, commercial paper, and money market mutual funds, with original maturities less than one year. The Company's investments with original maturity dates of less than three months from the purchase date are included in "Cash and cash equivalents" on the Consolidated Balance Sheets. The Company's investments with original maturity dates in excess of three months, but less than one year, from the purchase date are classified as short-term investments on the Consolidated Balance Sheets. Short-term investments classified as held-to-maturity are recorded at amortized cost. Interest earned on short-term investments is included in "Other expense (income), net" on the Consolidated Statements of Operations.
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments - The carrying amounts of the Company's cash and cash equivalents, short-term investments classified as held-to-maturity, accounts receivable, accounts payable and other accrued expenses, approximate fair value due to the short-term nature of these instruments. See "Derivative Instruments and Hedging Activities" below for a discussion of the Company's accounting policy for its interest rate swap.
Concentration of Credit Risk	'
	Concentration of Credit Risk - Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, investments and trade accounts receivable. Although the Company deposits its cash with more than one financial institution, its deposits, at times, may exceed federally insured limits. The Company has not experienced any losses on cash and cash equivalent accounts to date and the Company believes it is not exposed to any significant credit risk related to cash.
	The Company evaluates the adequacy of its allowance for doubtful accounts on a quarterly basis. This evaluation includes historical loss experience, length of time receivables are past due, adverse situations that may affect a customer's ability to repay and prevailing market conditions. This evaluation is inherently subjective and the Company may revise its estimates as more information becomes available.
Property and Equipment, Net	'
	Property and Equipment, Net - Property and equipment are stated at cost, less accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of those assets, as follows:
	Computer equipment and capitalized software	3 years
	Office equipment	5 years
	Furniture and fixtures	5 years
	Leasehold improvements	Shorter of estimated useful life or remaining lease term
	Repairs and maintenance costs are expensed as incurred.
Software Development Costs	'
	Software Development Costs - The Company accounts for the cost of computer software developed or obtained for internal use of its application service by capitalizing qualifying costs, which are incurred during the application development stage and amortizing them over the software's estimated useful life. Costs incurred in the preliminary and post-implementation stages of the Company's products are expensed as incurred. The amounts capitalized include external direct costs of services used in developing internal-use software, payroll and payroll-related costs of employees directly associated with the development activities and interest. The Company amortizes capitalized software over the expected period of benefit, which is three years, beginning when the software is ready for its intended use. Software development costs are evaluated for recoverability whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. During 2012, the Company recorded an impairment loss on certain internal-use capitalized software of $8.7 million.
Goodwill and Other Intangible and Long-Lived Assets	'
	Goodwill and Other Intangible and Long-Lived Assets - The Company assesses goodwill for impairment annually as of October 1 or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. The goodwill impairment test is based on the Company's single operating segment and reporting unit structure. In 2011, the FASB issued authoritative guidance which gives entities the option to qualitatively assess whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If the Company elects to perform a qualitative assessment and concludes it is not more likely than not that the fair value of its reporting unit is less than its carrying value, no further assessment is necessary; otherwise, the fair value of its reporting unit has to be determined and if the carrying value of its goodwill exceeds its implied fair value, an impairment loss equal to the excess is recorded. The Company adopted this newly issued authoritative guidance effective October 1, 2011.
	The Company's long-lived assets primarily consist of computer equipment, capitalized software, furniture, fixtures, office equipment and leasehold improvements, which are subject to depreciation over the useful life of the asset. Long-lived assets are evaluated for recoverability whenever events or changes in circumstances indicate that the carrying value of an asset may be impaired. In evaluating an asset for recoverability, the Company estimates the future cash flow expected to result from the use of the asset and eventual disposition. If the expected future undiscounted cash flow is less than the carrying amount of the asset, an impairment loss, equal to the excess of the carrying amount over the fair value of the asset, is recognized. No impairments were recorded on long-lived assets for the periods presented in these Consolidated Financial Statements.
Other Intangibles, net	'
	Goodwill and Other Intangible and Long-Lived Assets - The Company assesses goodwill for impairment annually as of October 1 or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. The goodwill impairment test is based on the Company's single operating segment and reporting unit structure. In 2011, the FASB issued authoritative guidance which gives entities the option to qualitatively assess whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If the Company elects to perform a qualitative assessment and concludes it is not more likely than not that the fair value of its reporting unit is less than its carrying value, no further assessment is necessary; otherwise, the fair value of its reporting unit has to be determined and if the carrying value of its goodwill exceeds its implied fair value, an impairment loss equal to the excess is recorded. The Company adopted this newly issued authoritative guidance effective October 1, 2011.
	The Company's long-lived assets primarily consist of computer equipment, capitalized software, furniture, fixtures, office equipment and leasehold improvements, which are subject to depreciation over the useful life of the asset. Long-lived assets are evaluated for recoverability whenever events or changes in circumstances indicate that the carrying value of an asset may be impaired. In evaluating an asset for recoverability, the Company estimates the future cash flow expected to result from the use of the asset and eventual disposition. If the expected future undiscounted cash flow is less than the carrying amount of the asset, an impairment loss, equal to the excess of the carrying amount over the fair value of the asset, is recognized. No impairments were recorded on long-lived assets for the periods presented in these Consolidated Financial Statements.
	Other Intangibles, net - represents definite-lived intangible assets, which are being amortized over their estimated useful lives as follows:
	Developed technology	10 years
	Customer relationships	10 years
	Trade name	12 years
	Non-compete agreement	3 years
	Developed technology is amortized over its estimated useful life at a rate consistent with the expected future cash flows to be generated by the asset. All other definite-lived intangible assets are amortized on a straight-line basis over their estimated useful lives.
Deferred Financing Costs	'
	Deferred Financing Costs - Deferred financing costs being amortized using the effective interest method over the expected remaining term of the loan. Amortized costs are presented separately as non-operating costs within the Company's Consolidated Statement of Operations.
Derivative Instruments and Hedging Activities	'
	Derivative Instruments and Hedging Activities - During 2012 and 2011, the Company maintained an interest rate swap agreement to economically hedge its exposure to changes in the amounts of future cash flows, driven by the variable rates associated with the Company's long-term debt. The interest rate swap agreement matured on June 30, 2012. The interest rate swap was recorded on the Consolidated Balance Sheet in "Accrued expenses and other current liabilities" at fair value. The fair value of the interest rate swap was measured each reporting period and included a credit valuation adjustment that reflected consideration of the Company's own credit risk, since the interest rate swap was in a liability position. Valuations may have fluctuated considerably from period-to-period due to volatility in underlying interest rates, which was driven by market conditions and the duration of the derivative instrument. The Company does not hold any derivatives and does not use financial instruments for any trading or other speculative purposes at December 31, 2013.
Warranties and Indemnification	'
	Warranties and Indemnification - The Company's revenue contracts generally provide for indemnification of customers against liabilities arising from third party claims that are attributable to the Company's breach of its warranties or infringement of third party intellectual property rights, subject to contractual limitations of liability. To date, the Company has not incurred any material costs as a result of such indemnifications and has not accrued any liabilities related to such obligations in the accompanying Consolidated Financial Statements as the Company currently has no infringement or warranty related disputes with customers or third parties.
	The Company has entered into contracts that include service level agreements with some of its customers in which the Company has warranted that it will provide certain levels of uptime. A subset of those customers have the explicit right, under the terms of their contracts, to receive credits or terminate their agreement in the event that the Company fails to meet those stated service levels. To date, the Company has not provided credits nor had any agreement canceled based on these service level agreements.
	The Company warrants that its service is provided in a manner reasonably designed for the secure transmission of customer data. The Company does not monitor its exposure to customer contracts in terms of maximum payout. In the event of an infringement claim giving rise to indemnification liability, the Company has the right to satisfy such obligations by providing a workaround or may suspend or terminate service to mitigate any liability. The Company relies on a risk framework to define risk tolerances and establish limits to ensure that certain risk-related losses occur within acceptable, predefined limits. Factors that it considers in determining exposure include the fact that the Company disclaims liability for consequential and indirect damages, including for loss of data, resulting from any breach of contract and that the Company, to date, has never had to do any make-good rework or been impacted by any payout in connection with any of these guarantees. Thus, the potential for the Company to be required to make payments under these arrangements is remote and, accordingly, no contingent liability is carried on the Consolidated Balance Sheet for these transactions.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Property and equipment useful lives	'
	Property and Equipment, Net - Property and equipment are stated at cost, less accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of those assets, as follows:
	Computer equipment and capitalized software	3 years
	Office equipment	5 years
	Furniture and fixtures	5 years
	Leasehold improvements	Shorter of estimated useful life or remaining lease term
	Fixed assets consisted of the following at:
			December 31,
			2013			2012
			(In thousands)
	Computer equipment and capitalized software		$	30,605		$	25,598
	Furniture, fixtures and office equipment		3,222			3,148
	Leasehold improvements		6,884			4,321
	Total fixed assets		40,711			33,067
	Less: Accumulated depreciation and amortization		(26,611		)	(22,422		)
	Fixed assets, net		$	14,100		$	10,645
Definite-lived intangible assets useful lives	'
	Other Intangibles, net - represents definite-lived intangible assets, which are being amortized over their estimated useful lives as follows:
	Developed technology	10 years
	Customer relationships	10 years
	Trade name	12 years
	Non-compete agreement	3 years

Investments_and_Fair_Value_Mea1

Investments and Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Marketable Securities [Abstract]

'

'

Held-to-maturity Securities

'

'

The following tables summarize these short-term investments as of December 31, 2013 and 2012:

2012

2013

Security Type

Maturity

Consolidated Balance Sheet Classification

Amortized Cost

Security Type

Maturity

Consolidated Balance Sheet Classification

Amortized Cost

(In thousands)

(In thousands)

Corporate Bonds

44 to 72 Days

Cash and cash equivalents

$

2,509

Commercial Paper

176 to 269 Days

Investments (short-term)

$

6,791

Commercial Paper

363 Days

Investments (short-term)

2,493

Corporate Notes

229 to 354 Days

Investments (short-term)

28,095

Corporate Notes

152 to 365 Days

Investments (short-term)

29,056

Total

$

34,886

Total

$

34,058

Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis

'

'

The following table summarizes the assets measured at fair value on a recurring basis as of December 31, 2013:

Total

Level 1

Level 2

Level 3

(In thousands)

Asset:

Money market funds as cash equivalents

$

5,031

5,031

—

—

The following table summarizes those assets measured at fair value on a recurring basis as of December 31, 2012:

Total

Level 1

Level 2

Level 3

(In thousands)

Asset:

Money market funds as cash equivalents

$

5,642

5,642

—

—

Goodwill_and_Other_Intangibles1

Goodwill and Other Intangibles (Tables)	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Finite-Lived Intangible Assets by Major Class	'
	As of December 31, 2013, other intangibles consists of the following:
		Definite – Lived Intangible Assets
		Gross		Accumulated Amortization			Net
		Carrying Amount					Carrying Amount
		(In Thousands)
	Customer relationships	$	141,973	$	(92,750	)	$	49,223
	Developed technology	132,642		(105,096		)	27,546
	Trade name	14,629		(7,980		)	6,649
	Non-compete agreements	1,039		(809		)	230
	Total	$	290,283	$	(206,635	)	$	83,648
	As of December 31, 2012, other intangibles consists of the following:
		Definite – Lived Intangible Assets
		Gross		Accumulated Amortization			Net
		Carrying Amount					Carrying Amount
		(In Thousands)
	Customer relationships	$	141,880	$	(78,553	)	$	63,327
	Developed technology	132,454		(96,960		)	35,494
	Trade name	14,618		(6,750		)	7,868
	Non-compete agreements	789		(728		)	61
	Total	$	289,741	$	(182,991	)	$	106,750
Allocation Of Amortization Expense For Other Intangible Assets	'
	Total intangible amortization expense is classified in each of the operating expense categories as follows:
		Years Ended December 31,
		2013		2012			2011
		(In Thousands)
	Cost of revenue	$	8,136	$	10,369		$	13,237
	Sales and marketing	14,198		14,175			14,175
	General and administrative	1,310		1,230			1,218
	Total	$	23,644	$	25,774		$	28,630
Schedule of Expected Amortization Expense	'
	Estimated intangible amortization expense on an annual basis for the succeeding five years is as follows:
	For the years ending December 31,	Amount
		(In thousands)
	2014	$	23,470
	2015	23,470
	2016	23,387
	2017	11,386
	2018	1,249
	Thereafter	686
	Total	$	83,648

Fixed_Assets_Tables

Fixed Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Property Plant and Equipment Income Statement Disclosures [Abstract]	'
Property, Plant and Equipment	'
	Property and Equipment, Net - Property and equipment are stated at cost, less accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of those assets, as follows:
	Computer equipment and capitalized software	3 years
	Office equipment	5 years
	Furniture and fixtures	5 years
	Leasehold improvements	Shorter of estimated useful life or remaining lease term
	Fixed assets consisted of the following at:
			December 31,
			2013			2012
			(In thousands)
	Computer equipment and capitalized software		$	30,605		$	25,598
	Furniture, fixtures and office equipment		3,222			3,148
	Leasehold improvements		6,884			4,321
	Total fixed assets		40,711			33,067
	Less: Accumulated depreciation and amortization		(26,611		)	(22,422		)
	Fixed assets, net		$	14,100		$	10,645

Capitalized_Software_Tables

Capitalized Software (Tables)	12 Months Ended
	Dec. 31, 2013
Research and Development [Abstract]	'
Capitalized Software	'
	Capitalized software consisted of the following at:
		December 31,
		2013			2012
		(In thousands)
	Capitalized software	$	96,478		$	83,432
	Less: Impairment of capitalized software	—			(8,715		)
	Less: Accumulated amortization	(64,137		)	(48,422		)
	Capitalized software, net	$	32,341		$	26,295

Accrued_Expenses_and_Other_Cur1

Accrued Expenses and Other Current Liabilities (Tables)	12 Months Ended
	Dec. 31, 2013
Accrued Liabilities, Current [Abstract]	'
Schedule of Accrued Liabilities	'
	Accrued expenses and other current liabilities consisted of the following at:
		December 31,
		2013		2012
		(In thousands)
	Salaries, commissions and related expenses	$	15,601	$	10,162
	Other accrued expenses	11,066		10,158
	Total accrued expenses and other current liabilities	$	26,667	$	20,320

Income_Tax_Tables

Income Tax (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Schedule of income before income tax, domestic and foreign	'
	The following is a summary of the Company's net loss before income tax by jurisdiction:
		Years Ended December 31,
		2013			2012			2011
		(In thousands)
	U.S.	$	(21,375	)	$	(28,325	)	$	(214	)
	Non-U.S.	748			720			183
	Net loss before income tax	$	(20,627	)	$	(27,605	)	$	(31	)
Schedule of components of income tax expense	'
	The components of the Company's income tax (benefit) expense are as follows:
		Years Ended December 31,
		2013			2012			2011
		(In thousands)
	Current:
	Federal	$	220		$	52		$	375
	State and local	626			726			986
	Foreign	2,143			1,852			952
	Total current income tax expense	2,989			2,630			2,313
	Deferred:
	Federal	(6,640		)	(10,396		)	1,061
	State and local	(1,483		)	(2,410		)	(1,908		)
	Foreign	(215		)	(49		)	(254		)
	Total deferred income tax benefit	(8,338		)	(12,855		)	(1,101		)
	Total income tax (benefit) expense	$	(5,349	)	$	(10,225	)	$	1,212
Schedule of effective income tax rate reconciliation	'
	A reconciliation of the provision for income taxes at the U.S. Federal statutory income tax rate of 35% to the Company's effective income tax rate is as follows:
		Years Ended December 31,
		2013			2012			2011
		(In thousands)
	Tax at U.S. federal statutory rate	$	(7,219	)	$	(9,662	)	$	(11	)
	State taxes, net of federal income tax effect	(557		)	(1,356		)	(668		)
	Stock-based compensation expense	1,334			(336		)	1,946
	Non-deductible expenses	438			212			712
	Foreign taxes	1,348			1,251			428
	Research and development credit	(1,008		)	(78		)	(1,231		)
	Other	315			(256		)	36
	Total	$	(5,349	)	$	(10,225	)	$	1,212
	Effective tax rate	25.9		%	37		%	(3970.2		)%
Schedule of deferred tax assets and liabilities	'
	Following is a summary of the components of deferred tax assets and deferred tax liabilities at December 31, 2013 and 2012:
		Years Ended December 31,
		2013			2012
		(In thousands)
	Net operating loss carryforwards - Current	$	5,972		$	3,792
	Accrued expenses	3,948			1,834
	Allowance for doubtful accounts	1,255			1,159
	Research and development tax credit	70			75
	Other	903			609
	Current deferred tax assets	12,148			7,469
	Net operating loss carryforwards - Non-current	7,701			15,427
	Research and development tax credit carryforwards	7,174			5,914
	AMT tax credit carryforwards	1,546			1,325
	Stock-based compensation	4,249			3,084
	Other	2,692			2,028
	Non-current deferred tax assets	23,362			27,778
	Total deferred tax assets	35,510			35,247
	Depreciation and amortization	(40,351		)	(48,913		)
	Non-current deferred tax liabilities	(40,351		)	(48,913		)
	Total deferred tax liabilities	(40,351		)	(48,913		)
	Net deferred tax liabilities	$	(4,841	)	$	(13,666	)
Schedule of unrecognized tax benefits	'
	The following table summarizes changes to the Company's unrecognized tax benefits, excluding interest and penalties, for the periods presented:
		Years Ended December 31,
		2013			2012			2011
		(In thousands)
	Beginning Balance as of January 1	$	3,335		$	3,161		$	2,578
	Additions based on tax positions related to the current year	389			168			475
	Additions for prior year tax positions	221			6			204
	Reductions from expirations of applicable statutes of limitations	—			—			(56		)
	Settlements	—			—			(40		)
	Balance as of December 31,	$	3,945		$	3,335		$	3,161

Debt_Tables

Debt (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Schedule of Long-term Debt Instruments	'
	Long-term debt consisted of the following at:
		December 31,
		2013			2012
		(In thousands)
	First Lien Credit Agreement (“Prior Credit Facility”)	$	74,898		$	75,719
	Other financing arrangements	315			549
	Less: current portion (Prior Credit Facility)	—			(821		)
	Less: current portion (Other financing arrangements)	(209		)	(209		)
	Total long-term debt	$	75,004		$	75,238
Schedule Of Interest Expense	'
	The following table summarizes the interest expense incurred on long-term debt:
		Years Ended December 31,
		2013			2012			2011
		(In thousands)
	Prior Credit Facility	$	4,618		$	4,863		$	6,100
	Interest Rate Swap (see Note 10)	—			1,515			4,570
	Other financing arrangements	35			32			8
	Total interest expense on long-term debt	$	4,653		$	6,410		$	10,678

Derivative_Financial_Instrumen1

Derivative Financial Instrument (Tables)	12 Months Ended
	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of derivative instruments, gain (loss) in statement of financial performance	'
	The effects of derivative instruments on the Consolidated Statements of Operations were as follows:
		Years Ended December 31,
		2013		2012			2011
		(In thousands)
	Other expense (income), net	$	—	$	(1,455	)	$	(4,193	)

Employee_Stock_Plans_Tables

Employee Stock Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	'
	Total stock-based compensation expense related to all of the Company’s stock awards was included in operating expense categories, as follows:
			Years Ended December 31,
			2013				2012			2011
			(In thousands)
	Cost of revenue		$	692			$	445		$	310
	Sales and marketing		1,320				1,080			2,353
	General and administrative		4,998				3,596			4,716
	Product development		1,276				1,440			1,329
	Total		$	8,286			$	6,561		$	8,708
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	'
	The following table summarizes the weighted average values of the assumptions used in the Black-Scholes pricing model to estimate the fair value of the options granted during the period presented:
			Years Ended December 31,
			2013		2012		2011
	Expected volatility		52.10%		59.10%		57.70%
	Expected life of option		6.09 years		6.09 years		6.06 years
	Risk free interest rate		1.30%		0.90%		1.60%
	Expected dividend yield		0.00%		0.00%		0.00%
Schedule of Share-based Compensation, Stock Options, Activity	'
	The following table summarizes stock option activity for the year ended December 31, 2013:
			Shares			Weighted Average Exercise Price
	Outstanding at December 31, 2012		5,541,130			$	6.8
	Granted		857,000			7.08
	Exercised		(300,301	)		5.37
	Forfeited		(887,445	)		7.91
	Outstanding at December 31, 2013		5,210,384			$	6.74
	The following table summarizes non-vested stock option activity for the year ended December 31, 2013:
			Shares			Weighted Average Grant Date Fair Value
	Non-vested options outstanding at December 31, 2012		3,816,020			$	3.6
	Granted		857,000			3.55
	Vested		(1,382,509	)		3.59
	Forfeited		(392,683	)		3.8
	Non-vested options outstanding at December 31, 2013		2,897,828			$	3.52
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range	'
	The following table contains additional information with respect to options outstanding and exercisable at December 31, 2013:
			Options Outstanding					Options Exercisable
			Number of			Remaining		Number Exercisable		Remaining Weighted Average Life
			Options Outstanding			Weighted
						Average Life
	Exercise Prices:
	$1.59 - $4.73		1,739,141			7.63 years		891,890		6.73 years
	$5.14 - $7.66		2,766,672			8.21 years		1,090,281		7.90 years
	$8.11 - $10.50		243,500			9.76 years		—		0.00 years
	$13.00 - $25.89		461,071			6.87 years		330,385		6.85 years
			5,210,384					2,312,556
Schedule of Share-based Compensation, Stock Options, Additional Disclosures	'
	The following table provides additional information pertaining to the Company's stock options:
		Years Ended December 31,
		2013				2012			2011
	Weighted average grant date fair value for options granted during the period	$	3.55			$	2.68		$	7.03
	Total fair value of options vested (in thousands)	$	4,968			$	5,968		$	4,752
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	'
	The following table summarizes RSU activity for the year ended December 31, 2013:
			Shares			Weighted Average Grant Date Fair Value
	Non-vested shares at December 31, 2012		446,456			$	7.34
	Granted		1,015,212			7.36
	Vested and issued		(164,828	)		8.98
	Forfeited		(98,550	)		5.93
	Non-vested shares at December 31, 2013		1,198,290			$	7.24
	Information concerning RSA’s outstanding under the 2010 Equity Incentive Plan is as follows:
			Shares			Weighted Average Grant Date Fair Value
	Non-vested shares at December 31, 2012		625,800			$	4.35
	Granted		76,167			9.19
	Vested and exchanged for common stock		(143,985	)		5.21
	Non-vested shares at December 31, 2013		557,982			$	4.79

Net_Loss_Income_Per_Share_Tabl

Net (Loss) Income Per Share (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted	'
	The following table provides a reconciliation of the numerator and denominator used in computing basic and diluted net loss per common share:
		Years Ended December 31,
		2013				2012			2011
	Numerator:
	Net loss (in thousands)	$	(15,278	)		$	(17,380	)	$	(1,243	)
	Denominator:
	Basic shares:
	Weighted-average common shares outstanding	55,135,657				54,352,536			53,381,655
	Diluted shares:
	Weighted-average shares used to compute basic net loss income per share	55,135,657				54,352,536			53,381,655
	Effect of potentially dilutive securities:
	Options to purchase common stock	—				—			—
	Unvested shares of restricted stock awards	—				—			—
	Unvested shares of restricted stock units	—				—			—
	Weighted-average shares used to compute diluted net income loss per share	55,135,657				54,352,536			53,381,655
	Net loss per share:
	Basic	$	(0.28	)		$	(0.32	)	$	(0.02	)
	Diluted	$	(0.28	)		$	(0.32	)	$	(0.02	)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	'
	The following outstanding options, non-vested RSAs and non-vested RSUs were excluded from the computation of diluted net loss per share for the periods presented as their effect would have been antidilutive:
		Years Ended December 31,
		2013			2012			2011
	Options to purchase common stock	5,210,384			5,541,130			4,817,748
	Unvested shares of restricted stock awards	557,982			625,800			72,985
	Unvested shares of restricted stock units	1,198,290			446,456			222,774

Segment_and_Geographic_Informa1

Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Revenue from External Customers by Products and Services	'
	The following table sets forth the Company's revenue by principal market:
		Years Ended December 31,
		2013		2012		2011
		(In thousands)
	M&A	$	110,456	$	91,606	$	83,763
	Enterprise	95,246		94,616		94,588
	DCM	28,794		30,445		34,539
	Other revenue	—		—		614
	Total revenue	$	234,496	$	216,667	$	213,504
Revenue from External Customers by Geographic Areas	'
	Revenue by geographic location is based on where the customer is located. Revenue and long-lived assets by geographic location are as follows:
		Years Ended December 31,
		2013		2012		2011
		(In thousands)
	Revenue:
	U.S.	$	137,603	$	131,487	$	128,404
	All other countries	96,893		85,180		85,100
	Total	$	234,496	$	216,667	$	213,504
		Years Ended December 31,
		2013		2012
		(In thousands)
	Long-lived assets (excluding goodwill and intangible assets):
	U.S.	$	45,702	$	36,372
	All other countries	740		645
	Total	$	46,442	$	37,017

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	'
	Future minimum payments under operating leases for the next five years and thereafter are as follows:
	Years Ending December 31,	Amount
		(In thousands)
	2014	$	4,247
	2015	3,836
	2016	2,720
	2017	2,690
	2018	2,566
	Thereafter	6,366
	Total	$	22,425

Organization_and_Descrption_of1

Organization and Descrption of Business (Details)	Aug. 05, 2010
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Common stock shares in connection with initial public offering	11,000,000

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]	'	'	'
Sales Commissions and Fees	$17,000,000	$13,400,000	$13,200,000
Property, Plant and Equipment [Line Items]	'	'	'
Impairment of capitalized software	0	8,715,000	0
Foreign currency transaction losses	$339,000	($301,000)	($875,000)
Computers and software [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful life	'3 years	'	'
Office equipment [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful life	'5 years	'	'
Furniture and fixtures [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Estimated useful life	'5 years	'	'

Summary_of_Significant_Account4

Summary of Significant Accounting Policies-Goodwill and Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2013
Developed technology [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Estimated useful life	'10 years
Customer relationships [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Estimated useful life	'10 years
Trade name [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Estimated useful life	'12 years
Non-compete agreement [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Estimated useful life	'3 years

Summary_of_Significant_Account5

Summary of Significant Accounting Policies-Adjustments (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2012
Cumulative adjustment for prior period error	$0.80	$0.80

Investments_and_Fair_Value_Mea2

Investments and Fair Value Measurements (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held-to-maturity Securities, Amortized Cost	34,886	34,058
Corporate Notes [Member] | Minimum [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held To Maturity Securities Maturity In Days	'229 days	'152 days
Corporate Notes [Member] | Maximum [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held To Maturity Securities Maturity In Days	'354 days	'365 days
Corporate Notes [Member] | Short-term Investments [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held-to-maturity Securities, Amortized Cost	28,095	29,056
Commercial Paper [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held To Maturity Securities Maturity In Days	'	'363 days
Commercial Paper [Member] | Minimum [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held To Maturity Securities Maturity In Days	'176 days	'
Commercial Paper [Member] | Maximum [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held To Maturity Securities Maturity In Days	'269 days	'
Commercial Paper [Member] | Short-term Investments [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held-to-maturity Securities, Amortized Cost	6,791	2,493
Corporate Bonds [Member] | Minimum [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held To Maturity Securities Maturity In Days	'	'44 days
Corporate Bonds [Member] | Maximum [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held To Maturity Securities Maturity In Days	'	'72 days
Corporate Bonds [Member] | Cash and Cash Equivalents [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Held-to-maturity Securities, Amortized Cost	'	2,509

Investments_and_Fair_Value_Mea3

Investments and Fair Value Measurements (Level 1, 2 and 3 Inputs) (Details) (Assets [Member], Fair Value, Measurements, Recurring [Member], USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Total [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Money Market Funds	$5,031	$5,642
Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Money Market Funds	5,031	5,642
Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Money Market Funds	0	0
Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Money Market Funds	$0	$0

Goodwill_and_Other_Intangibles2

Goodwill and Other Intangibles (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other intangible assets [Line Items]	'	'	'
Goodwill	$215,869	$215,478	'
Discounted Cash Flow Valuation Assumption To Calculate Terminal Value Equity Control Premium Percent	20.00%	'	'
Discounted Cash Flow Valuation Assumption To Calculate Terminal Value Discount Percent	13.00%	'	'
Components of Intangible Assets [Abstract]	'	'	'
Finite-Lived Intangible Assets, Gross	290,283	289,741	'
Finite-Lived Intangible Assets, Accumulated Amortization	-206,635	-182,991	'
Net Carrying Amount	83,648	106,750	'
Amortization of intangible assets	23,644	25,774	28,630
Customer relationships [Member]	'	'	'
Components of Intangible Assets [Abstract]	'	'	'
Finite-Lived Intangible Assets, Gross	141,973	141,880	'
Finite-Lived Intangible Assets, Accumulated Amortization	-92,750	-78,553	'
Net Carrying Amount	49,223	63,327	'
Developed technology [Member]	'	'	'
Components of Intangible Assets [Abstract]	'	'	'
Finite-Lived Intangible Assets, Gross	132,642	132,454	'
Finite-Lived Intangible Assets, Accumulated Amortization	-105,096	-96,960	'
Net Carrying Amount	27,546	35,494	'
Trade name [Member]	'	'	'
Components of Intangible Assets [Abstract]	'	'	'
Finite-Lived Intangible Assets, Gross	14,629	14,618	'
Finite-Lived Intangible Assets, Accumulated Amortization	-7,980	-6,750	'
Net Carrying Amount	6,649	7,868	'
Non-compete agreement [Member]	'	'	'
Components of Intangible Assets [Abstract]	'	'	'
Finite-Lived Intangible Assets, Gross	1,039	789	'
Finite-Lived Intangible Assets, Accumulated Amortization	-809	-728	'
Net Carrying Amount	230	61	'
Cost of revenue [Member]	'	'	'
Components of Intangible Assets [Abstract]	'	'	'
Amortization of intangible assets	8,136	10,369	13,237
Selling and marketing [Member]	'	'	'
Components of Intangible Assets [Abstract]	'	'	'
Amortization of intangible assets	14,198	14,175	14,175
General and administrative expense [Member]	'	'	'
Components of Intangible Assets [Abstract]	'	'	'
Amortization of intangible assets	$1,310	$1,230	$1,218

Goodwill_and_Other_Intangibles3

Goodwill and Other Intangibles (Future Amortization Expense) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
2013	$23,470	'
2014	23,470	'
2015	23,387	'
2016	11,386	'
2017	1,249	'
Thereafter	686	'
Total	$83,648	$106,750

Fixed_Assets_Details

Fixed Assets (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]	'	'	'
Total fixed assets	$40,711	$33,067	'
Less: Accumulated depreciation and amortization	-26,611	-22,422	'
Fixed assets, net	14,100	10,645	'
Depreciation expense	5,148	5,011	5,893
Computer and office equipment and software [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total fixed assets	30,605	25,598	'
Furniture and fixtures [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total fixed assets	3,222	3,148	'
Leasehold improvements [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total fixed assets	$6,884	$4,321	'

Capitalized_Software_Details

Capitalized Software (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Research and Development [Abstract]	'	'	'
Capitalized software	$96,478	$83,432	'
Capitalized Computer Software, Impairments	0	8,715	0
Less: Accumulated amortization	-64,137	-48,422	'
Capitalized software, net	32,341	26,295	'
Amortization computer software expense	$15,715	$13,557	$14,106

Accrued_Expenses_and_Other_Cur2

Accrued Expenses and Other Current Liabilities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accrued Liabilities, Current [Abstract]	'	'
Sales commissions and bonuses	$15,601	$10,162
Other accrued expenses	11,066	10,158
Total accrued expenses and other current liabilities	$26,667	$20,320

Income_Tax_Net_Income_Loss_Bef

Income Tax (Net Income (Loss) Before Income Tax by Jurisdiction) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
U.S.	($21,375)	($28,325)	($214)
Non-U.S.	748	720	183
Net loss before income tax	($20,627)	($27,605)	($31)

Income_Tax_Income_Tax_Expense_

Income Tax (Income Tax Expense (Benefit)) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:	'	'	'
Federal	$220	$52	$375
State and local	626	726	986
Foreign	2,143	1,852	952
Total current income tax expense	2,989	2,630	2,313
Deferred:	'	'	'
Federal	-6,640	-10,396	1,061
State and local	-1,483	-2,410	-1,908
Foreign	-215	-49	-254
Total deferred income tax benefit	-8,338	-12,855	-1,101
Total income tax (benefit) expense	($5,349)	($10,225)	$1,212

Income_Tax_Reconciliation_of_t

Income Tax (Reconciliation of the Provision for Income Taxes at Statutory Rate) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
Federal statutory income tax rate	35.00%	35.00%	35.00%
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]	'	'	'
Tax at U.S. federal statutory rate	($7,219)	($9,662)	($11)
State taxes, net of federal income tax effect	-557	-1,356	-668
Stock-based compensation expense	1,334	-336	1,946
Non-deductible expenses	438	212	712
Foreign taxes	1,348	1,251	428
Research and development credit	-1,008	-78	-1,231
Other	315	-256	36
Total income tax (benefit) expense	($5,349)	($10,225)	$1,212
Effective tax rate	25.90%	37.00%	-3970.20%

Income_Tax_Component_of_Deferr

Income Tax (Component of Deferred Tax Assets and Liabilities) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Components of Deferred Tax Assets, Current [Abstract]	'	'
Net operating loss carryforwards - Current	$5,972	$3,792
Accrued expenses	3,948	1,834
Allowance for doubtful accounts	1,255	1,159
Research and development tax credit	70	75
Other	903	609
Current deferred tax assets	12,148	7,469
Components of Deferred Tax Assets, Noncurrent [Abstract]	'	'
Net operating loss carryforwards - Non-current	7,701	15,427
Research and development tax credit carryforwards	7,174	5,914
AMT tax credit carryforwards	1,546	1,325
Stock-based compensation	4,249	3,084
Other	2,692	2,028
Non-current deferred tax assets	23,362	27,778
Total deferred tax assets	35,510	35,247
Components of Deferred Tax Liabilities [Abstract]	'	'
Depreciation and amortization	-40,351	-48,913
Non-current deferred tax liabilities	-40,351	-48,913
Total deferred tax liabilities	-40,351	-48,913
Deferred Tax Liabilities, Net	$4,841	$13,666

Income_Tax_Unrecognized_Tax_Be

Income Tax (Unrecognized Tax Benefits) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits [Roll Forward]	'	'	'
Beginning balance	$3,335	$3,161	$2,578
Additions based on tax positions related to the current year	389	168	475
Additions for prior year tax positions	221	6	204
Reductions from expirations of applicable statutes of limitations	0	0	-56
Settlements	0	0	-40
Ending balance	$3,945	$3,335	$3,161

Income_Tax_Narrative_Details

Income Tax (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Accrued Penalties and Interest	$200,000	'	'	'
Penalties and Interest Expense	30,000	30,000	30,000	'
Income tax examination, foreign losses disallowed	'	'	'	58,300,000
Income Tax [Line Items]	'	'	'	'
Net operating loss carryforwards	48,276,000	'	'	'
Net operating loss carryforwards, attributable to windfall tax benefits related to equity compensation	11,270,000	'	'	'
Unrecognized tax benefits that would impact effective tax rate	3,406,000	'	'	'
Research Tax Credit Carryforward [Member] | Internal Revenue Service (IRS) [Member]	'	'	'	'
Income Tax [Line Items]	'	'	'	'
Tax credit carryforward	8,016,000	'	'	'
Research Tax Credit Carryforward [Member] | State and Local Jurisdiction [Member]	'	'	'	'
Income Tax [Line Items]	'	'	'	'
Tax credit carryforward	$4,056,000	'	'	'

Debt_Details

Debt (Details) (USD $)

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

0 Months Ended

1 Months Ended

Dec. 31, 2011

Jun. 30, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Apr. 30, 2011

Dec. 31, 2013

Dec. 31, 2012

Apr. 06, 2012

Jun. 15, 2007

Apr. 06, 2012

Apr. 06, 2012

Apr. 06, 2012

Jun. 30, 2012

Dec. 31, 2011

Jun. 30, 2011

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2011

Dec. 31, 2013

Jun. 15, 2013

First Lien Credit Facility [Member]

First Lien Credit Facility [Member]

First Lien Credit Facility [Member]

First Lien Credit Facility [Member]

First Lien Credit Facility [Member]

First Lien Credit Facility [Member]

First Lien Credit Facility [Member]

First Lien Credit Facility [Member]

First Lien Credit Facility [Member]

Other Financing Arrangements [Member]

Other Financing Arrangements [Member]

Other Financing Arrangements [Member]

Other Financing Arrangements [Member]

Other Financing Arrangements [Member]

Collateralized Facility [Member]

Collateralized Facility [Member]

Minimum [Member]

Maximum [Member]

Before Repayment Of Debt [Member]

After Repayment of Debt [Member]

Long-term Debt, Other Disclosures [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value of long-term debt

'

'

'

'

'

'

$74,992,000

$76,647,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum interest rate

'

'

'

'

'

'

1.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basis spread

'

'

'

'

'

'

4.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest rate percentage at end of period

'

'

'

'

'

'

6.00%

5.75%

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from follow-on stock offering

'

'

'

'

'

34,582,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt repayment

'

'

'

'

'

34,582,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Quarterly principal debt payment

'

'

'

'

'

338,000

'

'

'

'

'

'

246,000

205,000

'

'

'

'

'

'

'

Capital expenditures

'

'

'

'

'

'

'

'

'

'

21,000,000

35,000,000

'

'

'

'

'

'

'

'

'

Debt Intstrument, Prepaid Amount

'

'

'

'

'

'

'

'

15,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Revolving line of credit maximum

'

'

'

'

'

'

15,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

2,500,000

Collateral amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,400,000

'

Pledged equity interest in domestic subsidiaries

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Pledged equity interest in direct foreign subsidiaries

'

'

'

'

'

'

65.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amortization of debt issuance cost

'

'

358,000

740,000

1,369,000

400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Financing Arrangement Terms

'25 months

'50 months

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt, by Current and Noncurrent [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

First Lien Agreement (First Lien Credit Facility)

'

'

'

'

'

'

74,898,000

75,719,000

'

135,000,000

'

'

'

'

'

'

'

'

'

'

'

Other financing arrangements

'

'

315,000

549,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,240,000

'

'

Less: current portion

'

'

'

'

'

'

0

-821,000

'

'

'

'

'

'

'

'

-209,000

-209,000

'

'

'

Total long-term debt

'

'

75,004,000

75,238,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amortization of Financing Costs and Discounts

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$215,000

$130,000

'

'

'

'

'

Debt_Financing_Costs_and_Inter

Debt (Financing Costs and Interest Expense) (Details) (USD $)

12 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Aug. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2011

Jun. 30, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

First Lien Credit Facility [Member]

First Lien Credit Facility [Member]

First Lien Credit Facility [Member]

Tranche B, inclusive of $0, $0 and $768, respectively related to debt discount [Member]

Tranche B, inclusive of $0, $0 and $768, respectively related to debt discount [Member]

Tranche B, inclusive of $0, $0 and $768, respectively related to debt discount [Member]

Interest Rate Swap [Member]

Interest Rate Swap [Member]

Interest Rate Swap [Member]

Other Financing Arrangements [Member]

Other Financing Arrangements [Member]

Other Financing Arrangements [Member]

Other Financing Arrangements [Member]

Other Financing Arrangements [Member]

Other Financing Arrangements [Member]

Long-term Debt, Other Disclosures [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other financing arrangements

$315,000

$549,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1,240,000

Amortization of Financing Costs and Discounts

'

'

'

'

'

'

'

'

'

'

'

'

'

215,000

130,000

'

'

'

'

Director and Officer Insurance Premium

'

'

'

800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Financing agreement to purchase D&O insurance, short term portion

'

'

'

600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest and Debt Expense [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total interest expense on long-term debt

4,653,000

6,410,000

10,678,000

'

4,618,000

4,863,000

6,100,000

'

'

'

0

1,515,000

4,570,000

'

'

35,000

32,000

8,000

'

Amortization of debt discount

'

'

'

'

'

'

'

0

0

768,000,000

'

'

'

'

'

'

'

'

'

Interest Costs Capitalized

$500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Details) (Interest Rate Swap [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest Rate Swap [Member]	'	'	'
Derivative [Line Items]	'	'	'
Derivative, Net Hedge Ineffectiveness Gain (Loss)	$0	($1,455)	($4,193)

Common_Stock_Details

Common Stock (Details) (USD $)	0 Months Ended			12 Months Ended
	Jul. 27, 2012	Apr. 06, 2011	Aug. 05, 2010	Dec. 31, 2013	Dec. 06, 2010	Sep. 09, 2010	Dec. 31, 2013	Dec. 31, 2012
							Common Stock [Member]	Common Stock [Member]
Equity [Abstract]	'	'	'	'	'	'	'	'
Shares authorized	'	'	'	'	'	'	300,000,000	300,000,000
Common stock par value	'	'	'	'	'	'	$0.00	$0.00
Common Stock, Shares, Issued	'	'	'	'	'	'	56,054,484	55,486,651
Shareholder vote needed to increase shares authorized, minimum, percent of issued and outstanding shares	'	'	'	75.00%	'	'	'	'
Shares outstanding	'	'	'	'	'	'	56,054,484	55,486,651
Public offering, shares offered	'	1,250,000	11,000,000	'	2,000,000	'	'	'
Public offering price per share	'	$25.50	$13	'	$20	$13	'	'
Conversion of Preferrred Stock to Common Stock, Shares	'	'	35,101,716	'	'	'	'	'
Common Stock, Shares, Exercise of Over-allotment	'	'	'	'	'	980,000	'	'
Over-allotment option in shares	'	187,500	'	'	'	'	'	'
Stock Issued During Period, Shares, New Issues	4,500,000	1,437,500	'	'	'	'	'	'
Shares held by entities associated with TA Associates, L.P. and Rho Capital Partners, Inc.	'	'	'	16,943,130	'	'	'	'

Employee_Stock_Plans_Stock_Bas

Employee Stock Plans (Stock Based Compensation) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock-based compensation expense	$8,286	$6,561	$8,708
Cost of revenue [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock-based compensation expense	692	445	310
Product development [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock-based compensation expense	1,276	1,440	1,329
Selling and marketing [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock-based compensation expense	1,320	1,080	2,353
General and administrative expense [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock-based compensation expense	$4,998	$3,596	$4,716

Employee_Stock_Plans_Black_Sch

Employee Stock Plans (Black Scholes Pricing Model - Options) (Details) (Stock Options [Member])	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Options [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected volatility	52.10%	59.10%	57.70%
Expected life of option	'6 years 1 month 2 days	'6 years 1 month 2 days	'6 years 0 months 22 days
Risk free interest rate	1.30%	0.90%	1.60%
Expected dividend yield	0.00%	0.00%	0.00%

Employee_Stock_Plans_Stock_Opt

Employee Stock Plans (Stock Options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Weighted Average Grant Date Fair Value [Abstract]	'	'	'
Weighted average grant date fair value, options granted	$3.55	$2.68	$7.03
Vested [Member]	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price [Abstract]	'	'	'
Options outstanding, beginning balance (in shares)	5,541,130	'	'
Options granted (in shares)	857,000	'	'
Options exercised (in shares)	-300,301	'	'
Options forfeited (in shares)	-887,445	'	'
Options outstanding, ending balance (in shares)	5,210,384	'	'
Weighted Average Exercise Price [Abstract]	'	'	'
Weighted average exercise price, beginning balance	$6.80	'	'
Weighted average exercise price, options granted	$7.08	'	'
Weighted average exercise price, options exercised	$5.37	'	'
Weighted average exercise price, options forfeited	$7.91	'	'
Weighted average exercise price, ending balance	$6.74	'	'
Non-Vested [Member]	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price [Abstract]	'	'	'
Options outstanding, beginning balance (in shares)	3,816,020	'	'
Options granted (in shares)	857,000	'	'
Options vested (in shares)	-1,382,509	'	'
Options forfeited (in shares)	-392,683	'	'
Options outstanding, ending balance (in shares)	2,897,828	'	'
Weighted Average Grant Date Fair Value [Abstract]	'	'	'
Weighted average grant date fair value, beginning balance	$3.60	'	'
Weighted average grant date fair value, options granted	$3.55	'	'
Weighted average grant date fair value, options vested	$3.59	'	'
Weighted average grant date fair value, options forfeited	$3.80	'	'
Weighted average grant date fair value, ending balance	$3.52	'	'

Employee_Stock_Plans_Exercise_

Employee Stock Plans (Exercise Price Range) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Options Outstanding, Number of Options Outstanding	5,210,384
Options Exerciseable, Number Exercisable	2,312,556
$1.59 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$1.59
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$4.73
Options Outstanding, Number of Options Outstanding	1,739,141
Options Outstanding, Remaining Weighted Average Life	'7 years 7 months 18 days
Options Exerciseable, Number Exercisable	891,890
Options Exerciseable, Remaining Weighted Average Life	'6 years 8 months 24 days
$3.29 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$5.14
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$7.66
Options Outstanding, Number of Options Outstanding	2,766,672
Options Outstanding, Remaining Weighted Average Life	'8 years 2 months 17 days
Options Exerciseable, Number Exercisable	1,090,281
Options Exerciseable, Remaining Weighted Average Life	'7 years 10 months 26 days
$4.34 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$8.11
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$10.50
Options Outstanding, Number of Options Outstanding	243,500
Options Outstanding, Remaining Weighted Average Life	'9 years 9 months 5 days
Options Exerciseable, Number Exercisable	0
Options Exerciseable, Remaining Weighted Average Life	'0 years
$4.36 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$13
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$25.89
Options Outstanding, Number of Options Outstanding	461,071
Options Outstanding, Remaining Weighted Average Life	'6 years 10 months 15 days
Options Exerciseable, Number Exercisable	330,385
Options Exerciseable, Remaining Weighted Average Life	'6 years 10 months 7 days

Employee_Stock_Plans_Restricte

Employee Stock Plans (Restricted Stock) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restricted Stock Awards (RSAs) [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]	'	'	'
Non-vested oustanding, beginning balance (in shares)	625,800	'	'
Granted (in shares)	76,167	'	'
Vested (in shares)	-143,985	'	'
Non-vested oustanding, ending balance (in shares)	557,982	625,800	'
Weighted Average Grant Date Fair Value [Abstract]	'	'	'
Weighted average grant date fair value, beginning balance	$4.35	'	'
Weighted average grant date fair value, granted	$9.19	$4.24	$18
Weighted average grant date fair value, vested	$5.21	'	'
Weighted average grant date fair value, ending balance	$4.79	$4.35	'
Restricted Stock Units (RSUs) [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]	'	'	'
Non-vested oustanding, beginning balance (in shares)	446,456	'	'
Granted (in shares)	1,015,212	'	'
Vested (in shares)	-164,828	'	'
Forfeited (in shares)	-98,550	'	'
Non-vested oustanding, ending balance (in shares)	1,198,290	446,456	'
Weighted Average Grant Date Fair Value [Abstract]	'	'	'
Weighted average grant date fair value, beginning balance	$7.34	'	'
Weighted average grant date fair value, granted	$7.36	$4.70	$14.72
Weighted average grant date fair value, vested	$8.98	'	'
Weighted average grant date fair value, forfeited	$5.93	'	'
Weighted average grant date fair value, ending balance	$7.24	$7.34	'

Employee_Stock_Plans_Additiona

Employee Stock Plans (Additional Stock Option Activity) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'	'
Weighted average grant date fair value for options granted during the period (usd per share)	$3.55	$2.68	$7.03
Total fair value of options vested	$4,968	$5,968	$4,752

Employee_Stock_Plans_Disclosur

Employee Stock Plans (Disclosure) (Details) (USD $)

0 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

0 Months Ended

0 Months Ended

1 Months Ended

In Thousands, except Share data, unless otherwise specified

Jul. 27, 2012

Apr. 06, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Feb. 01, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Feb. 01, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Jul. 15, 2007

Jun. 15, 2007

Mar. 08, 2010

Mar. 07, 2010

Jul. 31, 2012

Jul. 31, 2010

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Restricted Stock Awards (RSAs) [Member]

Restricted Stock Awards (RSAs) [Member]

Restricted Stock Awards (RSAs) [Member]

Restricted Stock Awards (RSAs) [Member]

Market Based Award [Member]

Market Based Award [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

2007 Restricted Preferred Stock Plan [Member]

2007 Restricted Preferred Stock Plan [Member]

2007 Stock Option and Grant Plan [Member]

2007 Stock Option and Grant Plan [Member]

2010 Equity Incentive Plan [Member]

2010 Equity Incentive Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of shares authorized

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,033,320

8,000,000

4,000,000

7,814,330

3,314,330

Shares granted

'

'

'

'

'

'

'

'

'

76,167

'

'

'

'

1,015,212

'

'

2,033,320

'

'

'

'

'

Additional shares authorized

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,000,000

'

4,500,000

'

Aggregate intrinsic value outstanding

'

'

'

'

'

$31,049

$5,050

'

'

$6,757

$3,861

'

'

'

$14,511

$2,755

'

'

'

'

'

'

'

Unrecognized compensation costs

'

'

'

'

'

'

'

'

'

1,161

1,948

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate intrinsic value exercisable

'

'

'

'

'

14,077

1,820

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Intrinsic value of options exercised

'

'

1,039

1,541

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecognized compensation cost, options

'

'

'

'

'

9,247

12,444

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock-based compensation expense

'

'

8,286

6,561

8,708

4,777

3,925

6,074

'

1,500

1,460

1,376

'

745

1,973

952

903

'

'

'

'

'

'

Weighted average grant date fair value, granted

'

'

'

'

'

'

'

'

'

$9.19

$4.24

$18

'

'

$7.36

$4.70

$14.72

'

'

'

'

'

'

Fair value of vested shares

'

'

'

'

'

'

'

'

'

750

941

1,515

'

'

1,481

1,125

644

'

'

'

'

'

'

Unrecognized compensation expense

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6,951

2,330

'

'

'

'

'

'

'

Weighted average period of recognizing share based compensation expenses (years)

'

'

'

'

'

'2 years 8 months 10 days

'3 years 4 months 28 days

'

'

'2 years 8 months 23 days

'2 years 6 months 5 days

'

'

'

'3 years 2 months 13 days

'3 years 8 months 12 days

'

'

'

'

'

'

'

Stock Issued During Period, Shares, New Issues

4,500,000

1,437,500

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common Stock, Shares, Issued

'

'

76,167

709,292

'

'

'

'

500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value Of Market Based Award

'

'

'

'

'

'

'

'

'

'

'

'

$2,121

'

'

'

'

'

'

'

'

'

'

Expected life of option

'

'

'

'

'

'6 years 1 month 2 days

'6 years 1 month 2 days

'6 years 0 months 22 days

'

'

'

'

'3 years 9 months 18 days

'

'

'

'

'

'

'

'

'

'

Expected volatility

'

'

'

'

'

52.10%

59.10%

57.70%

'

'

'

'

60.32%

'

'

'

'

'

'

'

'

'

'

Risk free interest rate

'

'

'

'

'

1.30%

0.90%

1.60%

'

'

'

'

0.72%

'

'

'

'

'

'

'

'

'

'

Expected dividend yield

'

'

'

'

'

0.00%

0.00%

0.00%

'

'

'

'

0.00%

'

'

'

'

'

'

'

'

'

'

Employee_Stock_Plans_Disclosur1

Employee Stock Plans (Disclosure CEO Stock Awards) (Details) (USD $)	1 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Feb. 01, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Common Stock, Shares, Issued	'	76,167	709,292	'
Stock-based compensation expense	'	$8,286	$6,561	$8,708
Restricted Stock Awards (RSAs) [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Common Stock, Shares, Issued	500,000	'	'	'
Stock-based compensation expense	'	1,500	1,460	1,376
Market Based Award [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Fair Value Of Market Based Award	2,121	'	'	'
Expected life	'3 years 9 months 18 days	'	'	'
Expected volatility	60.32%	'	'	'
Risk free interest rate	0.72%	'	'	'
Expected dividend yield	0.00%	'	'	'
Stock-based compensation expense	'	$745	'	'

Employee_Stock_Plans_Disclosur2

Employee Stock Plans (Disclosure Continued) (Details) (USD $)	0 Months Ended	12 Months Ended
	Aug. 09, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jul. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Stock-based compensation expense	'	$8,286,000	$6,561,000	$8,708,000	'
Restricted Stock Units (RSUs) [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Weighted average period of recognizing share based compensation expenses (years)	'	'3 years 2 months 13 days	'3 years 8 months 12 days	'	'
Weighted average grant date fair value, granted	'	$7.36	$4.70	$14.72	'
Fair value of vested shares	'	1,481,000	1,125,000	644,000	'
Stock-based compensation expense	'	1,973,000	952,000	903,000	'
Employee Stock Purchase Plan [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
ESPP rights outstanding, aggregate intrinsic value	'	0	0	'	'
Modified Awards [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Stock-based compensation expense	'	'	800,000	'	'
Expense reversed related to forfeiture of unvested options	'	'	1,400,000	'	'
2010 Employee Stock Purchase Plan [Member] | Employee Stock Purchase Plan [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Number of shares authorized	'	'	'	'	400,000
Additional shares authorized	1,000,000	'	'	'	'
Purchase price, percentage of fair value	'	85.00%	'	'	'
Shares reserved for future issuance	'	1,000,000	'	'	'
Shares issued	'	420,627	'	'	'
Shares available for future issuance	'	579,373	'	'	'
Stock-based compensation expense	'	$40,000	$200,000	$400,000	'

Net_Loss_Income_Per_Share_Deta

Net (Loss) Income Per Share (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Weighted Average Number Diluted Shares Outstanding Adjustment Abstract [Line Items]	'	'	'
Net (loss)	($15,278)	($17,380)	($1,243)
Weighted-average shares used to compute basic net (loss) income per share	55,135,657	54,352,536	53,381,655
Weighted-average shares used to compute diluted net (loss) income per share	55,135,657	54,352,536	53,381,655
Earnings Per Share, Basic [Abstract]	'	'	'
Basic (in dollars per share)	($0.28)	($0.32)	($0.02)
Diluted (in dollars per share)	($0.28)	($0.32)	($0.02)
Options To Purchase Common Stock [Member]	'	'	'
Weighted Average Number Diluted Shares Outstanding Adjustment Abstract [Line Items]	'	'	'
Weighted Average Number Diluted Shares Outstanding Adjustment	0	0	0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	5,210,384	5,541,130	4,817,748
Unvested Shares Of Restricted Stock Awards [Member]	'	'	'
Weighted Average Number Diluted Shares Outstanding Adjustment Abstract [Line Items]	'	'	'
Weighted Average Number Diluted Shares Outstanding Adjustment	0	0	0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	557,982	625,800	72,985
Unvested Shares Of Restricted Stock Units [Member]	'	'	'
Weighted Average Number Diluted Shares Outstanding Adjustment Abstract [Line Items]	'	'	'
Weighted Average Number Diluted Shares Outstanding Adjustment	0	0	0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,198,290	446,456	222,774

Segment_and_Geographic_Informa2

Segment and Geographic Information (Narrative) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]	'	'	'
Revenues	$234,496	$216,667	$213,504
Americas [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Concentration Risk, Percentage	58.70%	'	'
United Kingdom [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Concentration Risk, Percentage	41.30%	'	'
Revenues	31,065	25,434	27,750
United Kingdom [Member] | Geographic Concentration Risk [Member] | Sales Revenue, Segment [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Concentration Risk, Percentage	13.00%	12.00%	13.00%
Other Segments [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Revenues	96,893	85,180	85,100
North America [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Revenues	$137,603	$131,487	$128,404

Segment_and_Geographic_Informa3

Segment and Geographic Information (Products and Services) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue from External Customer [Line Items]	'	'	'
Revenues	$234,496	$216,667	$213,504
North America [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Revenues	137,603	131,487	128,404
Other Segments [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Revenues	96,893	85,180	85,100
Enterprise [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Revenues	95,246	94,616	94,588
M&A [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Revenues	110,456	91,606	83,763
DCM [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Revenues	28,794	30,445	34,539
Other revenue [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Revenues	$0	$0	$614

Segment_and_Geographic_Informa4

Segment and Geographic Information (Geographic Location) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Long-Lived Assets	$46,442	$37,017	'
Revenues	234,496	216,667	213,504
Other Segments [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Long-Lived Assets	740	645	'
Revenues	96,893	85,180	85,100
North America [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Long-Lived Assets	45,702	36,372	'
Revenues	137,603	131,487	128,404
United Kingdom [Member]	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'
Revenues	$31,065	$25,434	$27,750
Concentration Risk, Percentage	41.30%	'	'

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Affiliates of TA Associates, Inc. [Member]	'	'
Related Party Transaction [Line Items]	'	'
Revenue from Related Parties	$225,000	$197,000
Due from Related Parties	0	'
Director [Member]	'	'
Related Party Transaction [Line Items]	'	'
Revenue from Related Parties	'	$2,874,000

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Leased Assets [Line Items]	'	'	'
Deferred rent credit	$3,610,000	'	'
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]	'	'	'
2013	4,247,000	'	'
2014	3,836,000	'	'
2015	2,720,000	'	'
2016	2,690,000	'	'
2017	2,566,000	'	'
Thereafter	6,366,000	'	'
Total	22,425,000	'	'
Operating leases, expense	5,476,000	6,318,000	5,429,000
Operating leases, period of free rent	'12 months	'	'
Lease with New York Landlord, Original Agreement [Member]	'	'	'
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]	'	'	'
Allowance from landlord for office improvements and other payments, utilized	$1,100,000	$1,900,000	'
Lease with New York Landlord, Original Agreement [Member] | Office Building [Member]	'	'	'
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]	'	'	'
Operating Leases, Area Leased	43,304	'	'
Lease with Massachusetts Landlord [Member] | Office Building [Member]	'	'	'
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]	'	'	'
Operating Leases, Area Leased	36,557	'	'

Schedule_II_Valudation_and_Qua1

Schedule II - Valudation and Qualifying Accounts (Details) (USD $)	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified		Allowance for doubtful accounts	Allowance for doubtful accounts	Allowance for doubtful accounts	Credit reserve	Credit reserve	Credit reserve
Movement in Valuation Allowances and Reserves [Roll Forward]	'	'	'	'	'	'	'
Balance at Beginning of Period	$2,418	$1,502	$724	$581	$1,425	$1,425	$1,837
Additions Charged to Expenses/Against Revenue	'	1,028	1,713	1,344	6,694	6,348	3,933
Deductions	'	-1,278	-935	-1,201	-6,219	-6,348	-4,345
Balance at End of Period	$2,418	'	$1,502	$724	'	$1,425	$1,425

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	12 Months Ended				0 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Mar. 11, 2014	Mar. 31, 2014	Feb. 24, 2014	Mar. 31, 2014	Feb. 24, 2014	Feb. 24, 2014
	First Lien Credit Facility [Member]	First Lien Credit Facility [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]
			sqft	Revolving Credit Facility [Member]	Term Loan [Member]	Term Loan [Member]	Term Loan [Member]	Term Loan [Member]
					First Lien Credit Facility [Member]	First Lien Credit Facility [Member]	First Lien Credit Facility [Member]	First Lien Credit Facility [Member]
						LIBOR [Member]	LIBOR [Member]	LIBOR [Member]
							Minimum [Member]	Maximum [Member]
Subsequent Event [Line Items]	'	'	'	'	'	'	'	'
Debt instrument, face amount	'	'	'	'	$80,000,000	'	'	'
Basis spread	4.50%	'	'	'	'	'	2.00%	5.25%
Interest rate percentage at end of period	6.00%	5.75%	'	'	'	7.25%	'	'
Principal payment percentage	'	'	'	'	0.25%	'	'	'
Revolving line of credit maximum	15,000,000	'	'	10,000,000	'	'	'	'
Area of real estate	'	'	51,325	'	'	'	'	'
Operating lease, base rate, years one through five	'	'	1,700,000	'	'	'	'	'
Operating lease, base rate, year six and therafter	'	'	$1,800,000	'	'	'	'	'