Intralinks (IL) 10-K 13 Mar 15 2014 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, 2014	Feb. 27, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Document type	10-K
Amendment flag	FALSE
Document year focus	2014
Document period focus	FY
Document period end date	31-Dec-14
Current fiscal year end date	-19
Entity central index key	1488075
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		57,119,831
Entity Public Float			$349.90

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$40,682	$50,540
Investments	11,825	34,886
Accounts receivable, net of allowances of $3,158 and $3,152, respectively	47,338	38,322
Deferred taxes	9,578	12,148
Prepaid expenses	6,602	6,036
Restricted cash	0	2,442
Other current assets	3,626	4,576
Total current assets	119,651	148,950
Investments	12,630	0
Fixed assets, net	16,245	14,100
Capitalized software, net	39,798	32,341
Goodwill	224,383	215,869
Other intangibles, net	62,055	83,648
Other assets	6,676	1,054
Total assets	481,438	495,962
Current liabilities:
Accounts payable	10,624	11,052
Current portion of long-term debt	906	209
Deferred revenue	49,193	44,651
Accrued expenses and other current liabilities	26,974	26,667
Total current liabilities	87,697	82,579
Long-term debt	77,933	75,004
Deferred taxes	9,578	16,989
Other long-term liabilities	5,291	5,289
Commitments and contingencies (Note 15)
Stockholders' equity:
Undesignated Preferred Stock, $0.001 par value; 10,000,000 shares authorized; 0 shares issued and outstanding	0	0
Common Stock, $0.001 par value; 300,000,000 shares authorized; 57,084,340 and 56,054,484 shares issued and outstanding, respectively	57	56
Additional paid-in capital	441,596	429,549
Accumulated deficit	-139,210	-112,714
Accumulated other comprehensive loss	-1,504	-790
Total stockholders' equity	300,939	316,101
Total liabilities and stockholders' equity	$481,438	$495,962

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
ASSETS
Allowance for Doubtful Accounts Receivable	$3,158	$3,152
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
Statement [Line Items]
Common stock par value	$0.00	$0.00
Authorized shares, common	300,000,000	300,000,000
Issued shares, common	57,084,340	56,054,484
Outstanding shares, common	57,084,340	56,054,484

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenue	$255,821	$234,496	$216,667
Cost of revenue	69,348	64,885	62,354
Gross profit	186,473	169,611	154,313
Operating expenses:
Sales and marketing	115,867	108,428	96,198
General and administrative	69,911	57,063	50,608
Product development	22,429	20,014	21,092
Impairment of capitalized software	0	0	8,715
Total operating expenses	208,207	185,505	176,613
Loss from operations	-21,734	-15,894	-22,300
Interest expense	4,202	4,136	6,435
Amortization of debt issuance costs	579	358	740
Other expense (income), net	1,746	239	-1,870
Net loss before income tax	-28,261	-20,627	-27,605
Income tax benefit	-1,765	-5,349	-10,225
Net loss	($26,496)	($15,278)	($17,380)
Net loss per common share
Basic (in dollars per share)	($0.47)	($0.28)	($0.32)
Diluted (in dollars per share)	($0.47)	($0.28)	($0.32)
Weighted average number of shares
Basic (in shares)	55,932,641	55,135,657	54,352,536
Diluted (in shares)	55,932,641	55,135,657	54,352,536

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Loss (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net (loss)	($26,496)	($15,278)	($17,380)
Change in foreign currency translation adjustment (net of tax benefit of $445, $432, and $154, respectively)	-714	-605	-236
Total other comprehensive loss, net of tax	-714	-605	-236
Comprehensive loss	($27,210)	($15,883)	($17,616)

Consolidated_Statement_of_Comp1

Consolidated Statement of Comprehensive Loss (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Tax benefit for change in foreign currency translation adjustment	$445	$432	$154

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Stockholders' Equity (USD $)	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
In Thousands, except Share data, unless otherwise specified
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]
Change in foreign currency translation adjustment, net of tax	-236				-236
Net loss	-17,380			-17,380
Exercise of stock options for common stock (in shares)		341,764
Exercise of stock options for common stock	481		481
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		795
Issuance of restricted common stock (in shares)	709,292
Issuance of restricted common stock	1	1
Stock-based compensation expense	6,561		6,561
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]
Change in foreign currency translation adjustment, net of tax	-605				-605
Net loss	-15,278			-15,278
Exercise of stock options for common stock (in shares)		405,328
Exercise of stock options for common stock	1,106	1	1,105
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		540
Issuance of restricted common stock (in shares)	76,167
Issuance of restricted common stock	0
Stock-based compensation expense	8,286		8,286
Balance at Dec. 31, 2013	316,101	56	429,549	-112,714	-790
Balance (in shares) at Dec. 31, 2013		56,054,484
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in foreign currency translation adjustment, net of tax	-714				-714
Net loss	-26,496			-26,496
Exercise of stock options for common stock (in shares)		817,634
Exercise of stock options for common stock	721	1	720
Issuance of common stock in connection with employee stock purchase plan (in shares)		126,017
Issuance of common stock in connection with employee stock purchase plan	943		943
Issuance of restricted common stock (in shares)	86,205
Issuance of restricted common stock	0
Stock-based compensation expense	10,384		10,384
Balance at Dec. 31, 2014	$300,939	$57	$441,596	($139,210)	($1,504)
Balance (in shares) at Dec. 31, 2014		57,084,340

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Cash Flows [Abstract]
Net loss	($26,496)	($15,278)	($17,380)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	25,627	20,864	18,567
Amortization of intangible assets	23,791	23,644	25,774
Stock-based compensation expense	10,384	8,286	6,561
Impairment of capitalized software	0	0	8,715
Amortization of deferred costs	1,316	1,517	1,808
Provision for bad debt and customer credits	1,802	1,594	1,713
Deferred income tax benefit	-4,708	-8,338	-13,007
Gain on interest rate swap	0	0	-1,455
Other, net	572	-18	403
Changes in operating assets and liabilities:
Accounts receivable	-11,390	-2,363	-690
Prepaid expenses and other assets	146	-1,181	-873
Accounts payable	884	5,142	-490
Accrued expenses and other liabilities	-499	4,132	4,793
Deferred revenue	4,344	4,008	747
Net cash provided by operating activities	25,773	42,009	35,186
Cash flows from investing activities:
Capitalized software development costs	-27,076	-20,495	-18,013
Capital expenditures	-9,823	-6,976	-8,014
Purchases of investments	-27,062	-47,604	-37,445
Maturities of investments	36,879	43,326	41,220
Purchases of cost method investments	-3,499	0	0
Acquisitions, net of cash acquired	-8,843	-600	-300
Restricted cash	2,443	-2,443	0
Net cash used in investing activities	-36,981	-34,792	-22,552
Cash flows from financing activities:
Proceeds from issuance of long-term debt	79,200	0	0
Payments on long-term debt	-75,498	-821	-15,861
Payments of outstanding financing arrangements	-376	-708	-641
Debt issuance costs	-2,849	-284	0
Proceeds from exercise of stock options and issuance of common stock, net of withholding taxes	1,662	1,645	1,276
Other	-188	0	0
Net cash provided by (used in) financing activities	1,951	-168	-15,226
Effect of foreign exchange rate changes on cash and cash equivalents	-601	-307	-304
Net (decrease) increase in cash and cash equivalents	-9,858	6,742	-2,896
Cash and cash equivalents at beginning of period	50,540	43,798	46,694
Cash and cash equivalents at end of period	40,682	50,540	43,798
Cash paid during the period for:
Interest (net of capitalized interest of $1.8 million, $0.5 million and $0, respectively)	4,033	4,136	6,378
Income tax	2,572	2,416	2,005
Non-cash transactions during the period for:
Assets acquired through financing transactions	$0	$0	$591

Consolidated_Statement_of_Cash1

Consolidated Statement of Cash Flows (Parenthetical) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Cash Flows [Abstract]
Capitalized interest	$1.80	$0.50	$0

Organization_and_Descrption_of

Organization and Descrption of Business	12 Months Ended
	Dec. 31, 2014
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 enterprise content collaboration within and among organizations. The Company was incorporated in Delaware in June 1996. The Company's cloud-based solutions enable organizations to manage, 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.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
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, or U.S. GAAP. All intercompany balances and transactions have been eliminated in consolidation.
	Reclassifications - Certain reclassifications have been made to the prior year amounts to conform to the current year presentation.
	Use of Estimates - The preparation of the Company's Consolidated Financial Statements in conformity with U.S. GAAP requires management to make certain estimates, judgments 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. Actual results could differ materially from those estimates.
	On an ongoing basis, the Company evaluates its estimates and assumptions including those related to the determination of the fair value of stock-based awards including estimated forfeitures of such awards, the fair value of the Company's single reporting unit, the recoverability of its definite-lived intangible assets, capitalized software and fixed assets (and their related useful lives), certain components of the income tax provision, including the valuation allowance on deferred tax assets, allowances for doubtful accounts and reserves for customer credits and accruals for certain compensation expenses. The Company bases its estimates, judgments and assumptions on historical experience, its forecasts and budgets and on various other factors that it believes to be reasonable under the circumstances.
	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, which includes 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.
	In the normal course of business, the Company may agree to sales concessions with its customers. The Company maintains an allowance to reserve for potential credits issued to customers based on historical patterns of actual credits issued. Expenses associated with maintaining this reserve are recorded as a reduction to revenue.
	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 types of services is recognized over the longer of the contract term or the estimated relationship life, which generally ranges 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 services to determine if a change in this estimate is warranted in future periods.
	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 but not yet collected 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 non-current portion included in "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 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 11); (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 certain performance based RSAs and RSUs. The fair value of the performance based RSAs and RSUs were 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 these peer companies. The Company intends to continue to consistently apply this process using the same or similar companies 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 companies 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.
	Stock-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, third-party channel partners and resellers are expensed in the period earned. Sales commission expense was $19.2 million, $17.0 million and $13.4 million, respectively, for the years ended December 31, 2014, 2013 and 2012 and is 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 in the period 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.
	In determining whether it is necessary to record a valuation allowance, the Company assesses whether its deferred income tax assets are more-likely-than-not realizable. This analysis 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 analysis 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). 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 monetary assets and liabilities denominated in a currency other than the subsidiary's functional currency are reported in the Consolidated Statements of Operations as a component of "Other expense (income), net." For the years ended December 31, 2014, 2013 and 2012, foreign currency transaction losses (gains) were $1.9 million, $0.3 million and $(0.3) 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.
	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 remaining maturities less than two years. The Company's investments not included in "Cash and cash equivalents" with remaining maturity dates less than one year are classified as current investments and investments with remaining maturity dates greater than one year are classified as non-current investments on the Consolidated Balance Sheets. Investments classified as held-to-maturity are recorded at amortized cost. Interest earned on investments is included in "Other expense (income), net" on the Consolidated Statements of Operations.
	Non-marketable investments for which the Company does not have the ability to exert significant influence over operating and financial policies are generally accounted for using the cost method of accounting in accordance with ASC 325-10, Investments-Other. On a quarterly basis, the Company evaluates whether an event or change in circumstances has occurred in the reporting period that may have a significant adverse effect on the fair value of a cost method investment. If an event or change in circumstances that may cause a significant adverse effect on the fair value of a cost method investment occurs, then the fair value of such cost method investment is estimated to determine if the investment is impaired. No such events or changes in circumstances occurred during the reporting period.
	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.
	Accounts Receivable - The Company records accounts receivable at amounts due from customers, net of an allowance for doubtful accounts and reserve for potential credits issued to customers. The Company evaluates the adequacy of the allowance for doubtful accounts and the credit reserve 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 obligations to the Company, prevailing market conditions and historical patterns of actual credits issued. This evaluation is inherently subjective and the Company may revise its estimates as more information becomes available.
	Fixed Assets, Net - Fixed assets 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, ranging from 3 to 11 years
	Repairs and maintenance costs are expensed as incurred. When assets are retired or otherwise disposed of, the cost and accumulated depreciation and amortization are removed from their respective accounts and any gain or loss on such retirement is reflected in operating expenses.
	Software Development Costs - The Company accounts for the cost of software developed or obtained for internal use by capitalizing qualifying costs that are incurred during the application development stage and amortizing them over the expected period of benefit, which is generally three years. Amortization begins when the software is ready for its intended use. Costs incurred during the preliminary and post-implementation stages are expensed as incurred. The amounts capitalized include external direct costs of services used in developing internal-use software, employee compensation and related expenses of personnel directly associated with the development activities and interest. 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 - Goodwill represents the excess of the purchase price allocation over the fair value of tangible and identifiable intangible net assets acquired. 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. ASC 350, Intangibles - Goodwill and Other gives companies the option to perform a qualitative assessment to determine whether it is more likely than not (a likelihood of greater than 50 percent) that the fair value of its reporting unit is less than its carrying value. If it is determined, based on the qualitative assessment, that it is more likely than not that the fair value of its reporting unit is less than its carrying value, or if the company decides to exercise its unconditional option to bypass the qualitative assessment, then the company would proceed to a two-step quantitative impairment test. In the first step, the fair value of each reporting unit is compared with its carrying value, including goodwill and allocated intangible assets. If the fair value is in excess of the carrying value, the goodwill for the reporting unit is considered not to be impaired. If the fair value is less than the carrying value, then a second step is performed in order to measure the amount of the impairment loss, if any, which is based on comparing the implied fair value of the reporting unit's goodwill to the fair value of the net assets of the reporting unit.
	Other Intangibles, net - Other intangibles, net represents definite-lived intangible assets, which are being amortized over their estimated useful lives as follows:
	Developed technology	5 to 10 years
	Customer relationships	10 years
	Trade names	12 years
	Non-compete agreements	3 years
	Developed technology is primarily 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.
	Long-Lived Assets - The Company's long-lived assets consist of definite-lived intangible assets, capitalized software and fixed assets which are subject to depreciation or amortization over the useful life of the related asset. The useful lives of the Company's long-lived assets are determined based on its estimate of the period over which the related asset will be utilized; such lives are periodically reviewed for reasonableness. Long-lived assets are evaluated for recoverability whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. In evaluating an asset for recoverability, the Company estimates the future cash flows expected to result from the use and eventual disposition of the asset. If the sum of the undiscounted expected future cash flows is less than the carrying value of the asset, an impairment loss, equal to the excess of the carrying value 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.
	Debt Issuance Costs - Debt issuance costs are deferred and amortized on a straight-line basis over the term of the related loans.
	Warranties and Indemnification - The Company's revenue generating contracts generally provide for indemnification of customers against liabilities arising from third party claims that are attributable to the Company's breach of warranties or infringement of third party intellectual property rights, subject to contractual limitations of liability. In the event of an infringement claim, the Company has the right to satisfy its obligations to provide services to customers by providing them with a workaround that is non-infringing, terminating their service to mitigate any liability or providing a refund for any prepaid fees for the unexpired portion of the contract term. In its customer agreements, the Company warrants that the services it provides meet or exceed prevailing industry standards and are provided in a manner reasonably designed for the secure transmission of customer data hosted on the platform. In addition, the Company warrants that, to the best of its knowledge, the services it offers do not infringe any third party trade secret, copyright, U.S. or U.K. issued patent or trademark. The Company has entered into contracts that include service level agreements in which it 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 agreements with the Company in the event that the Company fails to meet those stated service levels.
	The Company relies on a risk framework to define risk tolerances and establish limits to ensure that potential risk-related losses under customer agreements are within acceptable limits. Factors that it considers in determining potential exposure under customer contracts 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 not had to do any make-good rework or been impacted by any payout in connection with any of these guarantees. To date, the Company has not incurred any material costs as a result of these indemnification obligations and has not accrued any liabilities related to these obligations in the Consolidated Financial Statements. In addition, to date, the Company has not provided credits nor had any agreement canceled based on its service level agreements.
	Recent Accounting Pronouncements
	In May 2014, the FASB issued Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers (Topic 606). The guidance outlines a single comprehensive model for entities to use in accounting for revenue. Under the guidance, which supersedes current revenue recognition guidance, revenue is recognized when a company transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The standard is effective for public entities with annual and interim reporting periods beginning after December 15, 2016. Entities have the option of using either a full retrospective or a modified retrospective approach to adopt the guidance. The Company is currently evaluating implementation methods and the effect that implementation of this standard will have on the Company’s Consolidated Financial Statements upon adoption.
	In June 2014, the FASB issued ASU 2014-12, Stock Compensation, providing guidance on accounting for share-based payment awards when the terms of an award provide that a performance target could be achieved after the requisite service period. The update clarifies that performance targets that can be achieved after the requisite service period of a share-based payment award be treated as performance conditions that affect vesting. These awards should be accounted for under Accounting Standards Codification Topic 718, Compensation - Stock Compensation, and existing guidance should be applied as it relates to awards with performance conditions that affect vesting. The update will become effective for the Company for annual periods and interim periods within those annual periods beginning after December 15, 2015. The Company is currently evaluating the impact of the adoption of this standard, if any, on its Consolidated Financial Statements.
	In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements - Going Concern: Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. The standard requires management to evaluate, at each interim and annual reporting period, whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date the financial statements are issued, and provide related disclosures. The update will become effective for annual periods ending after December 15, 2016, and for annual and interim periods thereafter. The Company does not expect this standard to have a material impact on its Consolidated Financial Statements.

Investments_and_Fair_Value_Mea

Investments and Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Marketable Securities [Abstract]
Investments and Fair Value Measurements	Investments and Fair Value Measurements
	The Company has classified its investments in corporate securities and commercial paper 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, 2014, 2013 and 2012 were not material.
	The following tables summarize these investments:
						31-Dec-14
	Security Type		Remaining Maturity		Consolidated Balance Sheet Classification	Amortized Cost
						(In thousands)
	Corporate Securities		9 to 349 Days		Investments (current)	$	11,825
	Corporate Securities		380 to 567 Days		Investments (non-current)	12,630
	Total					$	24,455
						31-Dec-13
	Security Type		Remaining Maturity		Consolidated Balance Sheet Classification	Amortized Cost
						(In thousands)
	Corporate Securities		229 to 354 Days		Investments (current)	$	28,095
	Commercial Paper		176 to 354 Days		Investments (current)	6,791
	Total					$	34,886
	The fair value hierarchy 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. The three levels for categorizing assets and liabilities measured at fair value 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.
	The following tables present the Company's financial instruments that are measured at fair value on a recurring basis:
			31-Dec-14
			Total			Level 1		Level 2		Level 3
			(In thousands)
	Asset:
	Money market funds as cash equivalents		$	13,851		$	13,851	$	—	$	—
			31-Dec-13
			Total			Level 1		Level 2		Level 3
			(In thousands)
	Asset:
	Money market funds as cash equivalents		$	5,031		$	5,031	$	—	$	—
	The Company's non-financial assets, which include goodwill, intangible assets, fixed assets, capitalized software and cost method investments, are adjusted to fair value only when an impairment charge is recognized. These fair value measurements are based predominantly on Level 3 inputs.
	At December 31, 2014, the carrying values of the Company's investments accounted for under the cost method totaled $3.5 million and are included in "Other assets" on the Company's Consolidated Balance Sheet.

Goodwill_and_Other_Intangibles

Goodwill and Other Intangibles	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangibles	Goodwill and Other Intangibles
	Acquisitions
	On April 23, 2014, the Company acquired all of the outstanding shares of docTrackr, Inc., a provider of document security solutions, for a total consideration of $10.5 million in cash, of which, $1.5 million is subject to a holdback to cover any post-closing indemnification claims by the Company. The holdback is scheduled to be released in two installments, the first in the amount of $0.5 million due April 2015 and the second in the amount of $1.0 million due October 2015, less, in each case, any amounts paid or reserved for outstanding indemnity claims, as of the applicable holdback release date. This transaction was accounted for as a business combination under the acquisition method. Assets acquired and liabilities assumed were recorded at fair value and the results of docTrackr, Inc. have been included within the Company’s Consolidated Financial Statements since the date of the acquisition. Pro forma financial information related to this acquisition was not included because the impact on the Company's Consolidated Financial Statements was not considered to be material. The purchase price was allocated among tangible and intangible assets and liabilities as follows: net tangible assets of $0.1 million, developed technology of $1.9 million with an estimated useful life of 5 years, non-compete agreements of $0.3 million with an estimated useful life of 3 years, a net deferred tax liability of $0.3 million and goodwill of $8.5 million. The weighted average useful life for the intangible assets is 4.7 years. The goodwill acquired is not deductible for tax purposes.
	Goodwill
	At December 31, 2014, changes in the carrying value of the Company's goodwill for the year then ended consisted of the following:
		Goodwill
		(In thousands)
	Balance as of December 31, 2013	$	215,869
	Acquisition of docTrackr, Inc.	8,514
	Balance as of December 31, 2014	$	224,383
	At December 31, 2014, the Company has $224.4 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.
	The Company completed a qualitative impairment assessment as of October 1, 2014. 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 quantitative impairment test was not necessary.
	At December 31, 2014, other intangibles consisted of the following:
		Definite – Lived Intangible Assets
		Gross		Accumulated Amortization			Net
		Carrying Value					Carrying Value
		(In thousands)
	Customer relationships	$	141,973	$	(106,944	)	$	35,029
	Developed technology	134,542		(113,303		)	21,239
	Trade name	14,629		(9,198		)	5,431
	Non-compete agreements	1,337		(981		)	356
	Total	$	292,481	$	(230,426	)	$	62,055
	At December 31, 2013, other intangibles consisted of the following:
		Definite – Lived Intangible Assets
		Gross		Accumulated Amortization			Net
		Carrying Value					Carrying Value
		(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
	The Company has not identified impairment for any of its definite-lived intangible assets through December 31, 2014.
	Intangible amortization expense is classified in each of the operating expense categories as follows:
		Years Ended December 31,
		2014		2013			2012
		(In thousands)
	Cost of revenue	$	8,206	$	8,136		$	10,369
	Sales and marketing	14,195		14,198			14,175
	General and administrative	1,390		1,310			1,230
	Total	$	23,791	$	23,644		$	25,774
	At December 31, 2014, amortization expense on an annual basis for the succeeding five years and thereafter is estimated to be as follows:
	For the years ending December 31,	Amount
		(In thousands)
	2015	$	23,949
	2016	23,866
	2017	11,799
	2018	1,629
	2019	716
	Thereafter	96
	Total	$	62,055

Fixed_Assets

Fixed Assets	12 Months Ended
	Dec. 31, 2014
Property Plant and Equipment Income Statement Disclosures [Abstract]
Fixed Assets	Fixed Assets
	Fixed assets consisted of the following:
		December 31,
		2014			2013
		(In thousands)
	Computer equipment and software	$	29,029		$	30,605
	Furniture, fixtures and office equipment	3,683			3,222
	Leasehold improvements	6,948			6,884
	Total fixed assets	39,660			40,711
	Less: Accumulated depreciation and amortization	(23,415		)	(26,611		)
	Fixed assets, net	$	16,245		$	14,100
	Depreciation expense is classified in each of the operating expense categories as follows:
		Years Ended December 31,
		2014			2013			2012
		(In thousands)
	Cost of revenue	$	3,543		$	2,860		$	1,909
	Sales and marketing	1,206			799			1,143
	General and administrative	1,030			758			887
	Product development	819			731			1,072
	Total	$	6,598		$	5,148		$	5,011

Capitalized_Software

Capitalized Software	12 Months Ended
	Dec. 31, 2014
Research and Development [Abstract]
Capitalized Software	Capitalized Software
	Capitalized software consisted of the following:
		December 31,
		2014			2013
		(In thousands)
	Capitalized internal-use software development costs	$	120,268		$	96,478
	Less: Accumulated amortization	(80,470		)	(64,137		)
	Capitalized software, net	$	39,798		$	32,341
	Amortization expense is classified in each of the operating expense categories as follows:
		Years Ended December 31,
		2014			2013			2012
		(In thousands)
	Cost of revenue	$	17,730		$	14,777		$	12,583
	Sales and marketing	323			206			215
	General and administrative	976			733			758
	Total	$	19,029		$	15,716		$	13,556

Accrued_Expenses_and_Other_Cur

Accrued Expenses and Other Current Liabilities	12 Months Ended
	Dec. 31, 2014
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:
		December 31,
		2014		2013
		(In thousands)
	Accrued employee compensation and related expenses	$	15,687	$	15,601
	Other accrued expenses	11,287		11,066
	Total accrued expenses and other current liabilities	$	26,974	$	26,667

Income_Tax

Income Tax	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Tax	Income Tax
	The following is a summary of the Company's U.S. and non-U.S. net (loss) income before income tax:
		Years Ended December 31,
		2014			2013			2012
		(In thousands)
	U.S.	$	(29,065	)	$	(21,375	)	$	(28,325	)
	Non-U.S.	804			748			720
	Net loss before income tax	$	(28,261	)	$	(20,627	)	$	(27,605	)
	The components of the Company's income tax benefit are as follows:
		Years Ended December 31,
		2014			2013			2012
		(In thousands)
	Current:
	Federal	$	181		$	220		$	52
	State and local	(42		)	626			726
	Foreign	2,804			2,143			1,852
	Total current income tax expense	2,943			2,989			2,630
	Deferred:
	Federal	(4,248		)	(6,640		)	(10,396		)
	State and local	(487		)	(1,483		)	(2,410		)
	Foreign	27			(215		)	(49		)
	Total deferred income tax benefit	(4,708		)	(8,338		)	(12,855		)
	Total income tax benefit	$	(1,765	)	$	(5,349	)	$	(10,225	)
	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,
		2014			2013			2012
		(In thousands)
	Tax at U.S. Federal statutory rate of 35%	$	(9,891	)	$	(7,219	)	$	(9,662	)
	State taxes, net of federal income tax effect	(1,186		)	(557		)	(1,356		)
	Stock-based compensation expense	622			1,886			(440		)
	Non-deductible expenses	759			438			212
	Foreign taxes	2,043			1,348			1,251
	Research and development credit	(647		)	(1,008		)	(78		)
	Other	88			(237		)	(152		)
	Valuation allowance	6,447			—			—
	Total	$	(1,765	)	$	(5,349	)	$	(10,225	)
	Effective tax rate	6.2		%	25.9		%	37		%
	Following is a summary of the components of deferred tax assets and deferred tax liabilities at December 31, 2014 and 2013:
		Years Ended December 31,
		2014			2013
		(In thousands)
	Deferred tax assets:
	Net operating loss carryforwards	$	10,008		$	13,673
	Research and development tax credit carryforwards	8,185			7,244
	Stock-based compensation	5,529			4,249
	Accrued expenses	4,108			3,948
	AMT tax credit carryforwards	1,727			1,546
	Allowance for doubtful accounts	1,264			1,255
	Other	4,275			3,595
	Total deferred tax assets	35,096			35,510
	Valuation allowance	(6,447		)	—
	Deferred tax assets, net of valuation allowance	28,649			35,510
	Deferred tax liabilities:
	Depreciation and amortization	(28,649		)	(40,351		)
	Total deferred tax liabilities	(28,649		)	(40,351		)
	Net deferred tax assets (liabilities), net of valuation allowance	$	—		$	(4,841	)
	At December 31, 2014, the Company had net operating loss carryforwards of $40.9 million, including $13.4 million of windfall tax benefits attributable to stock-based compensation. If not utilized, these net operating loss carryforwards will expire beginning in 2021 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, 2014, the Company had U.S. Federal and state research and development tax credit carryforwards of $8.9 million and $4.8 million, respectively, which if not utilized, will expire beginning in 2020 through 2034.
	The assessment regarding whether a valuation allowance is required considers both positive and negative evidence when determining whether it is more-likely-than-not that deferred tax assets are recoverable. In making this assessment, significant weight is given to evidence that can be objectively verified. After considering both negative and positive evidence to assess the recoverability of the Company’s net deferred tax assets during the fourth quarter of 2014, the Company determined that it was more-likely-than-not it would not realize its net deferred tax asset position. As a result, the Company determined that, as of December 31, 2014, a valuation allowance should be placed on its net deferred tax assets. The provision for income taxes increases in the period the valuation allowance against deferred tax assets is established. Adjustments could be required in the future if the Company concludes that it is more-likely-than-not that deferred tax assets are recoverable.
	Under the provisions of Sections 382 and 383 of the Internal Revenue Code of 1986, as amended (the "IRC"), substantial changes in the Company's or its subsidiaries' ownership may limit the amount of net operating loss and research tax credit carryforwards that can be utilized annually in the future to offset taxable income. Due to ownership changes in 2001, 2007, and 2011, 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 following table summarizes changes to the Company's unrecognized tax benefits, excluding interest and penalties:
		Years Ended December 31,
		2014			2013			2012
		(In thousands)
	Balance as of January 1	$	3,945		$	3,335		$	3,161
Additions based on tax positions related to the current year	540			389			168
Additions for prior year tax positions	289			221			6
Reductions from expirations of applicable statutes of limitations	(86		)	—			—
Balance as of December 31	$	4,688		$	3,945		$	3,335
If recognized, unrecognized tax benefits totaling $4.0 million at December 31, 2014, would impact our effective income tax rate.
At December 31, 2014, total accrued interest and penalties related to the uncertain tax positions was $0.5 million, which includes $0.3 million, $0.03 million, and $0.03 million recorded during the years ended December 31, 2014, 2013 and 2012, 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 2014 are open for examination by the U.S. Internal Revenue Service (the "IRS"). In addition, the Company's state and local income tax returns for 2011 through 2014 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.
In 2013, the IRS concluded an audit of the Company's U.S. Federal income tax returns for the years ended December 31, 2006 through 2009. Following that audit, the IRS delivered to the Company Notices of Proposed Adjustments for 2006, 2007 and 2008 disallowing $58.3 million of foreign branch losses on the basis that they constituted dual consolidated losses in the U.S. The IRS further asserted that the Company was not entitled to reasonable cause relief for late election filings. The Company disagreed with the IRS’ proposed adjustments and filed an appeal. On February 13, 2015, the Company was informed by the IRS that the IRS’ Appeals Office is in agreement with the Company’s position and has therefore concluded that the IRS’ proposed adjustments are not required. As a result, the Company will not be required to make any adjustment to its net operating loss carryforwards.
During the quarter ended September 30, 2014, the IRS commenced an examination of the Company’s 2010 and 2011 U.S. Federal income tax returns. Management believes that it is reasonably possible the IRS could propose audit adjustments related to these years that would impact the Company’s net operating loss carryforwards. However, 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, 2014
Debt Disclosure [Abstract]
Debt	Debt
	Long-term debt consisted of the following:
		December 31,
		2014			2013
		(In thousands)
	Term Loan Credit Facility	$	79,400		$	—
	Term Loan Credit Facility original issue discount	(667		)	—
	First Lien Credit Agreement (the “Prior Credit Facility”)	—			74,898
	Other financing arrangements	106			315
	Total debt	78,839			75,213
	Less: current portion (Term Loan Credit Facility)	(800		)	—
	Less: current portion (Other financing arrangements)	(106		)	(209		)
	Total long-term debt	$	77,933		$	75,004
	Based on available market information, the estimated fair value of the Company’s long-term debt was $78.7 million and $75.0 million as of December 31, 2014 and December 31, 2013, 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.
	Term Loan and Revolving Credit Facility
	On February 24, 2014, the Company refinanced all of the outstanding indebtedness under its Prior Credit Facility with the proceeds of its Term Loan Credit Facility and Revolving Credit Facility (collectively, the "Credit Facilities"). The Term Loan Credit Facility provides for an $80.0 million, 5-year term loan and bears interest at LIBOR, with a 2.00% floor plus a margin of 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, which commenced on June 30, 2014, with the balance due in a final installment on February 24, 2019.
	The Revolving Credit Facility (the "Revolving Credit Facility") originally provided for commitments of up to $10.0 million for general corporate purposes, working capital, certain investments, acquisitions and letters of credit. On June 20, 2014, the Revolving Credit Facility was amended to, among other things, increase the maximum commitment to $15.0 million. Loan drawings under the Revolving Credit Facility are subject to a further cap based on the Company’s borrowing base, which is equal to 85% of its eligible accounts receivable, minus customary reserves established by the Company’s lender. In addition, following the June 2014 amendment of this facility, up to 50% of the Company's eligible accounts receivable can be made up of account debtors of the Company based in certain European countries. Loans under the Revolving Credit Facility bear interest at the Eurodollar rate plus 2.50%. In addition, the Company pays a commitment fee in arrears on the first business day of each fiscal quarter of 0.50% on the average daily unused balance under the Revolving Credit Facility. The Revolving Credit Facility matures and the commitments thereunder terminate on the earlier of February 24, 2019 and the date that is six months prior to the maturity date of the Term Loan Credit Facility. Available borrowings under the Revolving Credit Facility are reduced by any outstanding letters of credits issued on behalf of the Company under this facility. As of December 31, 2014, the Company had $3.2 million in outstanding letters of credit issued under its Revolving Credit Facility.
	Debt issuance costs of approximately $2.8 million related to the Credit Facilities were deferred and are being amortized on a straight-line basis over the term of the loans. At December 31, 2014, unamortized debt issuance costs of $0.6 million and $1.8 million were recorded within "Other current assets" and "Other assets (non-current)," respectively, on the Consolidated Balance Sheet.
	Each of the Credit Facilities is secured by liens on substantially all of the Company's assets. The Revolving Credit Facility is secured by a first lien on cash, accounts receivable and certain other liquid collateral and a second lien on other assets. The Term Loan Credit Facility is secured by a second lien on cash, accounts receivable and certain other liquid collateral and a first lien on other assets.
	The Credit Facilities include covenants that restrict certain activities by the Company, as well as require the Company to comply with certain financial ratios such as a Consolidated Net Leverage Ratio and a springing Fixed Charge Coverage Ratio, as these terms are defined in the agreements governing the Credit Facilities. The agreements governing the Credit Facilities also contain other affirmative and negative covenants with which the Company is required to comply. The Term Loan Credit Facility requires partial prepayment of a portion of the principal outstanding in the event that we generate Consolidated Excess Cash Flow (as defined under the Term Loan Credit Facility) in excess of a certain threshold. This determination is to be made 90 days following the end of the preceding fiscal year, with any payment, if required 105 days following the end of the preceding fiscal year. The Company was in compliance with all applicable covenants set forth in the Credit Facilities and there was no required prepayment as of December 31, 2014.
	Prior Credit Facility
	The Prior Credit Facility provided for term loans in the aggregate principal amount of $135.0 million and included a requirement for mandatory prepayments based on annual excess free cash flow. Term loans under the Prior Credit Facility 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, the interest rate on the Prior Credit Facility was 6.00%.
	In June 2013, obligations previously covered by a revolving line of credit previously available to the Company, 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 the bank provided the landlords of certain of the Company's leased locations with separate letters of credit. This facility expired on June 3, 2014 and the cash collateral balance related to this facility (which had been classified as "Restricted cash" on the Company's Consolidated Balance Sheet) of $2.4 million was returned to the Company in June 2014.
	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 ended January 2014.

Common_Stock

Common Stock	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Common Stock	Common Stock
	As of December 31, 2014, the Company had 300.0 million shares of common stock, par value $0.001 per share ("common stock"), authorized, with 57.1 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.
	As of December 31, 2014, entities affiliated with TA Associates, L.P. and Rho Capital Partners, Inc. held 15.8 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, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Stock Plans	Employee Stock Plans
	2010 Equity Incentive Plan
	The Company currently has one active plan under which awards have been granted. 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. In addition, the 2010 Equity Incentive Plan was amended by the Company’s board of directors and stockholders in 2012 and in 2014 to increase the number of shares of common stock authorized for issuance. 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. 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. At December 31, 2014, the Company had stock options outstanding under the 2007 Stock Option and Grant Plan, and no awards outstanding under the 2007 Restricted Preferred Stock Plan. No additional grants will be made under these plans.
	At December 31, 2014, there were 3,631,173 shares of common stock available for future grants under the 2010 Equity Incentive Plan.
	Stock options granted under the 2010 Equity Incentive Plan typically have a 10-year contractual term and vest over four years, with 25% of the award vesting after one year and the balance vesting ratably over the subsequent 36 months. Prior to February 2013, stock options that were granted under the 2010 Equity Incentive Plan typically had a 10-year contractual term and vested over four years and 6 months, with 25% of the award vesting after one year and the balance vesting ratably over the subsequent 42 months.
	Stock-based compensation expense related to all of the Company’s stock awards is included in operating expense categories, as follows:
			Years Ended December 31,
			2014				2013			2012
			(In thousands)
	Cost of revenue		$	523			$	692		$	445
	Sales and marketing		1,920				1,320			1,080
	General and administrative		6,390				4,998			3,596
	Product development		1,551				1,276			1,440
	Total		$	10,384			$	8,286		$	6,561
	The total income tax benefit recognized for the years ended December 31, 2014, 2013 and 2012 related to stock-based compensation is $3.7 million, $2.8 million and $1.8 million, respectively.
	Stock Options
	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 stock options granted during the period presented:
			Years Ended December 31,
			2014		2013		2012
	Expected volatility		51.10%		52.10%		59.10%
	Expected life of option		6.21 years		6.09 years		6.09 years
	Risk free interest rate		1.90%		1.30%		0.90%
	Expected dividend yield		0.00%		0.00%		0.00%
	The following table summarizes stock option activity for the year ended December 31, 2014:
			Shares			Weighted Average Exercise Price
	Outstanding at December 31, 2013		5,210,384			$	6.74
	Granted		419,699			9.59
	Exercised		(525,999	)		4.61
	Forfeited		(415,828	)		10.71
	Outstanding at December 31, 2014		4,688,256			$	6.87
	The following table contains additional information with respect to options outstanding and exercisable at December 31, 2014:
			Options Outstanding					Options Exercisable
			Number of			Remaining		Number Exercisable		Remaining Weighted Average Life
			Options Outstanding			Weighted
						Average Life
	Exercise Prices:
	$1.59 - $4.73		1,186,726			6.67		771,054		6.18
	$5.14 - $7.89		2,559,540			7.29		1,673,864		7.17
	$8.08 - $11.57		606,999			9.23		70,857		8.75
	$12.00 - $25.89		334,991			5.87		309,694		5.82
			4,688,256					2,825,469
	At December 31, 2014, the aggregate intrinsic value of stock options outstanding and exercisable was $25.5 million and $16.0 million, respectively. At December 31, 2013, the aggregate intrinsic value of stock options outstanding and exercisable was $31.0 million and $14.1 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, 2014:
			Shares			Weighted Average Grant Date Fair Value
	Non-vested options outstanding at December 31, 2013		2,897,828			$	3.52
	Granted		419,699			4.86
	Vested		(1,156,724	)		3.74
	Forfeited		(298,016	)		3.95
	Non-vested options outstanding at December 31, 2014		1,862,787			$	3.62
	The following table provides additional information pertaining to the Company's stock options:
		Years Ended December 31,
		2014				2013			2012
	Weighted average grant date fair value for options granted during the period	$	4.86			$	3.55		$	2.68
	Total fair value of options vested (in thousands)	$	4,325			$	4,968		$	5,968
	The intrinsic value of options exercised for the years ended December 31, 2014, 2013 and 2012, was $2.5 million, $1.0 million and $1.5 million, respectively.
	At December 31, 2014 and 2013, there was $6.0 million and $9.2 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 2.19 years and 2.69 years, respectively.
	Cash received from stock option exercises and the related tax benefit realized for the years ended December 31, 2014, 2013 and 2012 are: $2.4 million and $0.9 million; $1.6 million and $0.4 million; and $0.6 million and $0.6 million, respectively.
	Restricted Stock Awards
	The following table summarizes RSA activity for the year ended December 31, 2014:
			Shares			Weighted Average Grant Date Fair Value
	Non-vested RSAs at December 31, 2013		557,982			$	4.79
	Granted		86,205			8.12
	Vested and exchanged for common stock		(79,535	)		8.62
	Non-vested RSAs at December 31, 2014		564,652			$	4.69
For the year ended December 31, 2014, 2013 and 2012, the weighted-average grant date fair value for RSAs was $8.12, $9.19 and $4.24, respectively. The fair value of RSAs vested was $0.7 million, $0.7 million and $0.9 million, respectively, during the same periods.
The aggregate intrinsic value of RSAs outstanding at December 31, 2014 and 2013 was $6.7 million and $6.8 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, 2014 and 2013, there was $0.5 million and $1.2 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 0.7 years and 1.0 year, respectively.
Certain of the RSAs granted to the Company's Chief Executive Officer in 2012 vest 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%.
Restricted Stock Units
The following table summarizes RSU activity for the year ended December 31, 2014:
		Shares			Weighted Average Grant Date Fair Value
Non-vested RSUs at December 31, 2013		1,198,290			$	7.24
Granted		1,228,649			9.22
Vested		(458,363	)		7.25
Forfeited		(202,671	)		8.47
Non-vested RSUs at December 31, 2014		1,765,905			$	8.47
For the years ended December 31, 2014, 2013 and 2012, the weighted-average grant date fair value for RSUs was $9.22, $7.36 and $4.70, respectively. The fair value of RSUs vested was $4.6 million, $1.5 million, and $1.1 million, respectively, during the same periods.
The aggregate intrinsic value of RSUs outstanding at December 31, 2014 and 2013 was $21.0 million and $14.5 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, 2014 and 2013, there was $11.3 million and $7.0 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 2.71 years and 3.20 years, respectively.
Certain of the RSUs granted to the Company's Chief Executive Officer in 2014 vest based upon the achievement of a specified stock performance threshold. The Company performed a Monte-Carlo simulation to calculate the award’s fair value of $1.3 million and derived service period of 1.30 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 46.48%, risk-free interest rate of return of 1.46% and a dividend yield of 0.0%.
In 2014, the Company granted RSUs to certain individuals in connection with the acquisition of docTrackr, Inc. The aggregate grant date fair value of these equity awards was $2.1 million. Of the awards granted, 83,914 of these RSUs are to non-employees and, accordingly, these awards will be remeasured at fair value as of each reporting period until the awards vest. Vesting is contingent upon continued service over a three-year period and, in the case of two awards, achievement of specified performance conditions.
Modification of Awards
During the years ended December 31, 2014 and 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 ESPP was adopted by the Company's board of directors and approved by its stockholders in July 2010 and subsequently amended by the Company's board of directors and stockholders in 2013. The number of shares available for purchase under the ESPP is 1,000,000. The Company makes one or more offerings each year to its employees to purchase stock under the 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, 2014, there are 1,000,000 shares of common stock reserved, 546,644 shares issued and 453,356 shares available for future issuance under the ESPP.

Net_Loss_Per_Share

Net Loss Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Net Loss 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,
		2014				2013			2012
	Numerator:
	Net loss (in thousands)	$	(26,496	)		$	(15,278	)	$	(17,380	)
	Denominator:
	Weighted-average shares used to compute basic net loss per share	55,932,641				55,135,657			54,352,536
	Effect of potentially dilutive securities:
	Options to purchase common stock	—				—			—
	Unvested shares of RSAs	—				—			—
	Unvested shares of RSUs	—				—			—
	Weighted-average shares used to compute diluted net income loss per share	55,932,641				55,135,657			54,352,536
	Net loss per share:
	Basic	$	(0.47	)		$	(0.28	)	$	(0.32	)
	Diluted	$	(0.47	)		$	(0.28	)	$	(0.32	)
	The following outstanding options to purchase Common Stock, unvested shares under RSAs and unvested shares issuable upon settlement of RSUs were excluded from the computation of diluted net loss per share for the periods presented as their effect would have been anti-dilutive:
		Years Ended December 31,
		2014			2013			2012
	Options to purchase common stock	4,688,256			5,210,384			5,541,130
	Unvested shares of restricted stock awards	564,652			557,982			625,800
	Unvested shares of restricted stock units	1,765,905			1,198,290			446,456

Segment_and_Geographic_Informa

Segment and Geographic Information	12 Months Ended
	Dec. 31, 2014
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, manufacturing, biotechnology, consumer, energy, telecommunications, industrial, legal, professional services, insurance and technology who use the Intralinks Platform 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.
	•	Enterprise comprises customers, across the same variety of industries described above, who use the Intralinks Platform for a wide range of corporate purposes.
	•	Debt Capital Markets ("DCM") comprises customers within the financial services industry who use the Intralinks Platform for loan syndication and administration and other debt-related transactions.
	The following table sets forth the Company's revenue by principal market:
			Years Ended December 31,
			2014		2013		2012
			(In thousands)
	M&A		$	130,471	$	110,456	$	91,606
	Enterprise		96,711		95,246		94,616
	DCM		28,639		28,794		30,445
	Total revenue		$	255,821	$	234,496	$	216,667
	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,
			2014		2013		2012
			(In thousands)
	Revenue:
	U.S.		$	146,317	$	137,603	$	131,487
	All other countries		109,504		96,893		85,180
	Total		$	255,821	$	234,496	$	216,667
			Years Ended December 31,
			2014		2013
			(In thousands)
	Long-lived assets (fixed assets and capitalized software):
	U.S.		$	54,380	$	45,702
	All other countries		1,663		739
	Total		$	56,043	$	46,441
	Concentration of Credit Risk and Significant Customers
	The Company operates globally with 57.2% of total revenues derived from customers located in the U.S. and the remaining 42.8% derived from customers located in various international locations. Revenue derived from customers located in the U.K. during the years ended December 31, 2014, 2013 and 2012 was $34.8 million, $31.1 million and $25.4 million, or 13.6%, 13.2% and 11.7% of total revenue, respectively. No other individual foreign country accounted for more than 10% of the Company's revenue during these periods.
	No individual customer accounted for more than 10% of the Company's revenue in the years ended December 31, 2014, 2013 and 2012.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
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 was nominal for the years ended December 31, 2014, 2013 and 2012. At December 31, 2014 there were no amounts due to TA Associates, L.P and amounts due from these affiliates of TA Associates, L.P. were nominal.

Commitments_and_Contigencies

Commitments and Contigencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	Commitments and Contingencies
	Operating Leases
	The Company has entered into various non-cancelable operating lease agreements for certain of our offices throughout the world with original lease periods expiring between 2015 and 2025. Certain of these arrangements have free or escalating rent payment provisions. We recognized rent expense under such arrangements on a straight-line basis.
	At December 31, 2014, future minimum payments under non-cancelable operating leases were as follows over the next five years and thereafter:
	Years Ending December 31,	Amount
		(In thousands)
	2015	$	6,026
	2016	4,988
	2017	4,971
	2018	4,862
	2019	4,818
	Thereafter	15,305
	Total	$	40,970
	Total rent expenses charged to operations for the years ended December 31, 2014, 2013 and 2012 was $6.6 million, $5.5 million and $5.2 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 commenced August 2011, has a ten year term and provided for 12 months of initial free rent and an allowance from the landlord for improvements of $1.9 million.
	In addition, the Company leases an office that is located at 404 Wyman Street, Waltham, Massachusetts that occupies 51,325 square feet for a term that expires October 2014. The lease commenced August 2014, has a ten year and three month term and provided for three months of initial free rent and an allowance from the landlord for improvements of $2.3 million.
	The Company also maintains space in several locations for its sales and services activities.
	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. 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 an amended scheduling order entered by the Court on April 18, 2014, the defendants filed their opposition to class certification on June 13, 2014 and plaintiff filed its reply on July 18, 2014. On September 30, 2014, the Court issued an opinion certifying a class of all persons who purchased the Company's stock between February 17, 2011 and November 11, 2011 and a subclass of persons who purchased the Company's stock pursuant or traceable to the Company’s April 6, 2011 offering. On October 6, 2014, the Court entered the parties’ scheduling stipulation, which extended the deadline to complete fact discovery to February 27, 2015. Under that same stipulation, summary judgment briefing must be completed by November 23, 2015. On October 14, 2014, the defendants filed a petition in the U.S. Court of Appeals for the Second Circuit for permission to appeal the September 30, 2014 opinion granting plaintiff’s motion for class certification. On December 30, 2014, the Second Circuit denied defendants’ petition. The Company believes that these claims are without merit and intends to defend these lawsuits vigorously.
	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 complaint alleges that the defendants breached their fiduciary duties by causing the Company to issue materially false and misleading statements about the Company's business operations and financial condition during the same Allegation Period alleged in the Consolidated Class Action Compliant. On April 24, 2012, one of the director defendants removed the Horbal Action to the SDNY, and 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. On June 6, 2014, plaintiff filed an amended complaint that continues to assert the same claims against the same defendants. Defendants filed their motions to dismiss the amended complaint on July 14, 2014.On February 4, 2015, following oral argument, the Court announced from the bench that it would grant defendants’ motions to dismiss. On February 19, 2015, the director defendants served plaintiff with a notice of entry of that dismissal, and plaintiff has until March 23, 2015 to file an appeal of the dismissal. 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 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 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. On March 27, 2014, counsel for the Demand Committee sent a letter to shareholder’s counsel stating that after thorough investigation of the allegations in the demand letter, the Board concluded that taking any or all of the demanded actions would not serve the best interests of the Company and its shareholders, and voted unanimously to reject the demand. Pursuant to a stipulation filed on June 2, 2014, the defendants filed motions to dismiss the action on July 2, 2014. On February 4, 2015, following oral argument, the Court announced from the bench that it would grant the defendants’ motions to dismiss, without prejudice. On February 19, 2015, the director defendants served plaintiff with a notice of entry of that dismissal, and plaintiff has until March 23, 2015 to file an appeal of the dismissal. 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, 2014
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, 2014
	Allowance for doubtful accounts	$	1,252	$	2,126	$	(2,120	)	$	1,258
	Credit reserve	1,900		8,574		(8,574		)	1,900
	Deferred tax asset valuation allowance	—		6,447		—			6,447
	Total	$	3,152	$	17,147	$	(10,694	)	$	9,605
	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

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
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, or U.S. GAAP. All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates - The preparation of the Company's Consolidated Financial Statements in conformity with U.S. GAAP requires management to make certain estimates, judgments 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. Actual results could differ materially from those estimates.
	On an ongoing basis, the Company evaluates its estimates and assumptions including those related to the determination of the fair value of stock-based awards including estimated forfeitures of such awards, the fair value of the Company's single reporting unit, the recoverability of its definite-lived intangible assets, capitalized software and fixed assets (and their related useful lives), certain components of the income tax provision, including the valuation allowance on deferred tax assets, allowances for doubtful accounts and reserves for customer credits and accruals for certain compensation expenses. The Company bases its estimates, judgments and assumptions on historical experience, its forecasts and budgets and on various other factors that it believes to be reasonable under the circumstances.
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, which includes 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.
	In the normal course of business, the Company may agree to sales concessions with its customers. The Company maintains an allowance to reserve for potential credits issued to customers based on historical patterns of actual credits issued. Expenses associated with maintaining this reserve are recorded as a reduction to revenue.
	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 types of services is recognized over the longer of the contract term or the estimated relationship life, which generally ranges 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 services to determine if a change in this estimate is warranted in future periods.
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 but not yet collected 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 non-current portion included in "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 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 11); (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 certain performance based RSAs and RSUs. The fair value of the performance based RSAs and RSUs were 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 these peer companies. The Company intends to continue to consistently apply this process using the same or similar companies 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 companies 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.
	Stock-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, third-party channel partners and resellers are expensed in the period earned.
Advertising	Advertising - The Company expenses the cost for producing and communicating advertising and promoting its services in the period 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.
	In determining whether it is necessary to record a valuation allowance, the Company assesses whether its deferred income tax assets are more-likely-than-not realizable. This analysis 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 analysis 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). 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 monetary assets and liabilities denominated in a currency other than the subsidiary's functional currency are reported in the Consolidated Statements of Operations as a component of "Other expense (income), net."
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.
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 remaining maturities less than two years. The Company's investments not included in "Cash and cash equivalents" with remaining maturity dates less than one year are classified as current investments and investments with remaining maturity dates greater than one year are classified as non-current investments on the Consolidated Balance Sheets. Investments classified as held-to-maturity are recorded at amortized cost. Interest earned on investments is included in "Other expense (income), net" on the Consolidated Statements of Operations.
	Non-marketable investments for which the Company does not have the ability to exert significant influence over operating and financial policies are generally accounted for using the cost method of accounting in accordance with ASC 325-10, Investments-Other. On a quarterly basis, the Company evaluates whether an event or change in circumstances has occurred in the reporting period that may have a significant adverse effect on the fair value of a cost method investment. If an event or change in circumstances that may cause a significant adverse effect on the fair value of a cost method investment occurs, then the fair value of such cost method investment is estimated to determine if the investment is impaired. No such events or changes in circumstances occurred during the reporting period.
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.
Property and Equipment, Net	Fixed Assets, Net - Fixed assets 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, ranging from 3 to 11 years
	Repairs and maintenance costs are expensed as incurred. When assets are retired or otherwise disposed of, the cost and accumulated depreciation and amortization are removed from their respective accounts and any gain or loss on such retirement is reflected in operating expenses.
Allowance for Doubtful Accounts	Accounts Receivable - The Company records accounts receivable at amounts due from customers, net of an allowance for doubtful accounts and reserve for potential credits issued to customers. The Company evaluates the adequacy of the allowance for doubtful accounts and the credit reserve 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 obligations to the Company, prevailing market conditions and historical patterns of actual credits issued. This evaluation is inherently subjective and the Company may revise its estimates as more information becomes available.
Software Development Costs	Software Development Costs - The Company accounts for the cost of software developed or obtained for internal use by capitalizing qualifying costs that are incurred during the application development stage and amortizing them over the expected period of benefit, which is generally three years. Amortization begins when the software is ready for its intended use. Costs incurred during the preliminary and post-implementation stages are expensed as incurred. The amounts capitalized include external direct costs of services used in developing internal-use software, employee compensation and related expenses of personnel directly associated with the development activities and interest. 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.
Goodwill	Goodwill - Goodwill represents the excess of the purchase price allocation over the fair value of tangible and identifiable intangible net assets acquired. 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. ASC 350, Intangibles - Goodwill and Other gives companies the option to perform a qualitative assessment to determine whether it is more likely than not (a likelihood of greater than 50 percent) that the fair value of its reporting unit is less than its carrying value. If it is determined, based on the qualitative assessment, that it is more likely than not that the fair value of its reporting unit is less than its carrying value, or if the company decides to exercise its unconditional option to bypass the qualitative assessment, then the company would proceed to a two-step quantitative impairment test. In the first step, the fair value of each reporting unit is compared with its carrying value, including goodwill and allocated intangible assets. If the fair value is in excess of the carrying value, the goodwill for the reporting unit is considered not to be impaired. If the fair value is less than the carrying value, then a second step is performed in order to measure the amount of the impairment loss, if any, which is based on comparing the implied fair value of the reporting unit's goodwill to the fair value of the net assets of the reporting unit.
Other Intangibles, net	Other Intangibles, net - Other intangibles, net represents definite-lived intangible assets, which are being amortized over their estimated useful lives as follows:
	Developed technology	5 to 10 years
	Customer relationships	10 years
	Trade names	12 years
	Non-compete agreements	3 years
	Developed technology is primarily 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.
Long-Lived Assets	Long-Lived Assets - The Company's long-lived assets consist of definite-lived intangible assets, capitalized software and fixed assets which are subject to depreciation or amortization over the useful life of the related asset. The useful lives of the Company's long-lived assets are determined based on its estimate of the period over which the related asset will be utilized; such lives are periodically reviewed for reasonableness. Long-lived assets are evaluated for recoverability whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. In evaluating an asset for recoverability, the Company estimates the future cash flows expected to result from the use and eventual disposition of the asset. If the sum of the undiscounted expected future cash flows is less than the carrying value of the asset, an impairment loss, equal to the excess of the carrying value 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.
Debt Issuance Costs	Debt Issuance Costs - Debt issuance costs are deferred and amortized on a straight-line basis over the term of the related loans.
Warranties and Indemnification	Warranties and Indemnification - The Company's revenue generating contracts generally provide for indemnification of customers against liabilities arising from third party claims that are attributable to the Company's breach of warranties or infringement of third party intellectual property rights, subject to contractual limitations of liability. In the event of an infringement claim, the Company has the right to satisfy its obligations to provide services to customers by providing them with a workaround that is non-infringing, terminating their service to mitigate any liability or providing a refund for any prepaid fees for the unexpired portion of the contract term. In its customer agreements, the Company warrants that the services it provides meet or exceed prevailing industry standards and are provided in a manner reasonably designed for the secure transmission of customer data hosted on the platform. In addition, the Company warrants that, to the best of its knowledge, the services it offers do not infringe any third party trade secret, copyright, U.S. or U.K. issued patent or trademark. The Company has entered into contracts that include service level agreements in which it 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 agreements with the Company in the event that the Company fails to meet those stated service levels.
	The Company relies on a risk framework to define risk tolerances and establish limits to ensure that potential risk-related losses under customer agreements are within acceptable limits. Factors that it considers in determining potential exposure under customer contracts 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 not had to do any make-good rework or been impacted by any payout in connection with any of these guarantees. To date, the Company has not incurred any material costs as a result of these indemnification obligations and has not accrued any liabilities related to these obligations in the Consolidated Financial Statements. In addition, to date, the Company has not provided credits nor had any agreement canceled based on its service level agreements.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	In May 2014, the FASB issued Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers (Topic 606). The guidance outlines a single comprehensive model for entities to use in accounting for revenue. Under the guidance, which supersedes current revenue recognition guidance, revenue is recognized when a company transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The standard is effective for public entities with annual and interim reporting periods beginning after December 15, 2016. Entities have the option of using either a full retrospective or a modified retrospective approach to adopt the guidance. The Company is currently evaluating implementation methods and the effect that implementation of this standard will have on the Company’s Consolidated Financial Statements upon adoption.
	In June 2014, the FASB issued ASU 2014-12, Stock Compensation, providing guidance on accounting for share-based payment awards when the terms of an award provide that a performance target could be achieved after the requisite service period. The update clarifies that performance targets that can be achieved after the requisite service period of a share-based payment award be treated as performance conditions that affect vesting. These awards should be accounted for under Accounting Standards Codification Topic 718, Compensation - Stock Compensation, and existing guidance should be applied as it relates to awards with performance conditions that affect vesting. The update will become effective for the Company for annual periods and interim periods within those annual periods beginning after December 15, 2015. The Company is currently evaluating the impact of the adoption of this standard, if any, on its Consolidated Financial Statements.
	In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements - Going Concern: Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern. The standard requires management to evaluate, at each interim and annual reporting period, whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date the financial statements are issued, and provide related disclosures. The update will become effective for annual periods ending after December 15, 2016, and for annual and interim periods thereafter. The Company does not expect this standard to have a material impact on its Consolidated Financial Statements.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Property and equipment useful lives	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, ranging from 3 to 11 years
	Fixed assets consisted of the following:
			December 31,
			2014			2013
			(In thousands)
	Computer equipment and software		$	29,029		$	30,605
	Furniture, fixtures and office equipment		3,683			3,222
	Leasehold improvements		6,948			6,884
	Total fixed assets		39,660			40,711
	Less: Accumulated depreciation and amortization		(23,415		)	(26,611		)
	Fixed assets, net		$	16,245		$	14,100
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	5 to 10 years
	Customer relationships	10 years
	Trade names	12 years
	Non-compete agreements	3 years

Investments_and_Fair_Value_Mea1

Investments and Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Marketable Securities [Abstract]
Held-to-maturity Securities	The following tables summarize these investments:
					31-Dec-14
	Security Type	Remaining Maturity		Consolidated Balance Sheet Classification	Amortized Cost
					(In thousands)
	Corporate Securities	9 to 349 Days		Investments (current)	$	11,825
	Corporate Securities	380 to 567 Days		Investments (non-current)	12,630
	Total				$	24,455
					31-Dec-13
	Security Type	Remaining Maturity		Consolidated Balance Sheet Classification	Amortized Cost
					(In thousands)
	Corporate Securities	229 to 354 Days		Investments (current)	$	28,095
	Commercial Paper	176 to 354 Days		Investments (current)	6,791
	Total				$	34,886
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis	The following tables present the Company's financial instruments that are measured at fair value on a recurring basis:
		31-Dec-14
		Total			Level 1		Level 2		Level 3
		(In thousands)
	Asset:
	Money market funds as cash equivalents	$	13,851		$	13,851	$	—	$	—
		31-Dec-13
		Total			Level 1		Level 2		Level 3
		(In thousands)
	Asset:
	Money market funds as cash equivalents	$	5,031		$	5,031	$	—	$	—

Goodwill_and_Other_Intangibles1

Goodwill and Other Intangibles (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	At December 31, 2014, changes in the carrying value of the Company's goodwill for the year then ended consisted of the following:
		Goodwill
		(In thousands)
	Balance as of December 31, 2013	$	215,869
	Acquisition of docTrackr, Inc.	8,514
	Balance as of December 31, 2014	$	224,383
Schedule of Finite-Lived Intangible Assets by Major Class	At December 31, 2014, other intangibles consisted of the following:
		Definite – Lived Intangible Assets
		Gross		Accumulated Amortization			Net
		Carrying Value					Carrying Value
		(In thousands)
	Customer relationships	$	141,973	$	(106,944	)	$	35,029
	Developed technology	134,542		(113,303		)	21,239
	Trade name	14,629		(9,198		)	5,431
	Non-compete agreements	1,337		(981		)	356
	Total	$	292,481	$	(230,426	)	$	62,055
	At December 31, 2013, other intangibles consisted of the following:
		Definite – Lived Intangible Assets
		Gross		Accumulated Amortization			Net
		Carrying Value					Carrying Value
		(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
Allocation Of Amortization Expense For Other Intangible Assets	Intangible amortization expense is classified in each of the operating expense categories as follows:
		Years Ended December 31,
		2014		2013			2012
		(In thousands)
	Cost of revenue	$	8,206	$	8,136		$	10,369
	Sales and marketing	14,195		14,198			14,175
	General and administrative	1,390		1,310			1,230
	Total	$	23,791	$	23,644		$	25,774
Schedule of Expected Amortization Expense	At December 31, 2014, amortization expense on an annual basis for the succeeding five years and thereafter is estimated to be as follows:
	For the years ending December 31,	Amount
		(In thousands)
	2015	$	23,949
	2016	23,866
	2017	11,799
	2018	1,629
	2019	716
	Thereafter	96
	Total	$	62,055

Fixed_Assets_Tables

Fixed Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Property Plant and Equipment Income Statement Disclosures [Abstract]
Property, Plant and Equipment	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, ranging from 3 to 11 years
	Fixed assets consisted of the following:
			December 31,
			2014			2013
			(In thousands)
	Computer equipment and software		$	29,029		$	30,605
	Furniture, fixtures and office equipment		3,683			3,222
	Leasehold improvements		6,948			6,884
	Total fixed assets		39,660			40,711
	Less: Accumulated depreciation and amortization		(23,415		)	(26,611		)
	Fixed assets, net		$	16,245		$	14,100
Schedule of Depreciation Expense by Statement of Financial Performance Location	Depreciation expense is classified in each of the operating expense categories as follows:
			Years Ended December 31,
			2014			2013			2012
			(In thousands)
	Cost of revenue		$	3,543		$	2,860		$	1,909
	Sales and marketing		1,206			799			1,143
	General and administrative		1,030			758			887
	Product development		819			731			1,072
	Total		$	6,598		$	5,148		$	5,011

Capitalized_Software_Tables

Capitalized Software (Tables)	12 Months Ended
	Dec. 31, 2014
Research and Development [Abstract]
Capitalized Software	Capitalized software consisted of the following:
		December 31,
		2014			2013
		(In thousands)
	Capitalized internal-use software development costs	$	120,268		$	96,478
	Less: Accumulated amortization	(80,470		)	(64,137		)
	Capitalized software, net	$	39,798		$	32,341
Schedule of Amortization by Statement of Financial Performance Location	Amortization expense is classified in each of the operating expense categories as follows:
		Years Ended December 31,
		2014			2013			2012
		(In thousands)
	Cost of revenue	$	17,730		$	14,777		$	12,583
	Sales and marketing	323			206			215
	General and administrative	976			733			758
	Total	$	19,029		$	15,716		$	13,556

Accrued_Expenses_and_Other_Cur1

Accrued Expenses and Other Current Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Accrued Liabilities, Current [Abstract]
Schedule of Accrued Liabilities	Accrued expenses and other current liabilities consisted of the following:
		December 31,
		2014		2013
		(In thousands)
	Accrued employee compensation and related expenses	$	15,687	$	15,601
	Other accrued expenses	11,287		11,066
	Total accrued expenses and other current liabilities	$	26,974	$	26,667

Income_Tax_Tables

Income Tax (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of income before income tax, domestic and foreign	The following is a summary of the Company's U.S. and non-U.S. net (loss) income before income tax:
		Years Ended December 31,
		2014			2013			2012
		(In thousands)
	U.S.	$	(29,065	)	$	(21,375	)	$	(28,325	)
	Non-U.S.	804			748			720
	Net loss before income tax	$	(28,261	)	$	(20,627	)	$	(27,605	)
Schedule of components of income tax expense	The components of the Company's income tax benefit are as follows:
		Years Ended December 31,
		2014			2013			2012
		(In thousands)
	Current:
	Federal	$	181		$	220		$	52
	State and local	(42		)	626			726
	Foreign	2,804			2,143			1,852
	Total current income tax expense	2,943			2,989			2,630
	Deferred:
	Federal	(4,248		)	(6,640		)	(10,396		)
	State and local	(487		)	(1,483		)	(2,410		)
	Foreign	27			(215		)	(49		)
	Total deferred income tax benefit	(4,708		)	(8,338		)	(12,855		)
	Total income tax benefit	$	(1,765	)	$	(5,349	)	$	(10,225	)
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,
		2014			2013			2012
		(In thousands)
	Tax at U.S. Federal statutory rate of 35%	$	(9,891	)	$	(7,219	)	$	(9,662	)
	State taxes, net of federal income tax effect	(1,186		)	(557		)	(1,356		)
	Stock-based compensation expense	622			1,886			(440		)
	Non-deductible expenses	759			438			212
	Foreign taxes	2,043			1,348			1,251
	Research and development credit	(647		)	(1,008		)	(78		)
	Other	88			(237		)	(152		)
	Valuation allowance	6,447			—			—
	Total	$	(1,765	)	$	(5,349	)	$	(10,225	)
	Effective tax rate	6.2		%	25.9		%	37		%
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, 2014 and 2013:
		Years Ended December 31,
		2014			2013
		(In thousands)
	Deferred tax assets:
	Net operating loss carryforwards	$	10,008		$	13,673
	Research and development tax credit carryforwards	8,185			7,244
	Stock-based compensation	5,529			4,249
	Accrued expenses	4,108			3,948
	AMT tax credit carryforwards	1,727			1,546
	Allowance for doubtful accounts	1,264			1,255
	Other	4,275			3,595
	Total deferred tax assets	35,096			35,510
	Valuation allowance	(6,447		)	—
	Deferred tax assets, net of valuation allowance	28,649			35,510
	Deferred tax liabilities:
	Depreciation and amortization	(28,649		)	(40,351		)
	Total deferred tax liabilities	(28,649		)	(40,351		)
	Net deferred tax assets (liabilities), net of valuation allowance	$	—		$	(4,841	)
Schedule of unrecognized tax benefits	The following table summarizes changes to the Company's unrecognized tax benefits, excluding interest and penalties:
		Years Ended December 31,
		2014			2013			2012
		(In thousands)
	Balance as of January 1	$	3,945		$	3,335		$	3,161
	Additions based on tax positions related to the current year	540			389			168
	Additions for prior year tax positions	289			221			6
	Reductions from expirations of applicable statutes of limitations	(86		)	—			—
	Balance as of December 31	$	4,688		$	3,945		$	3,335

Debt_Tables

Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Long-term debt consisted of the following:
		December 31,
		2014			2013
		(In thousands)
	Term Loan Credit Facility	$	79,400		$	—
	Term Loan Credit Facility original issue discount	(667		)	—
	First Lien Credit Agreement (the “Prior Credit Facility”)	—			74,898
	Other financing arrangements	106			315
	Total debt	78,839			75,213
	Less: current portion (Term Loan Credit Facility)	(800		)	—
	Less: current portion (Other financing arrangements)	(106		)	(209		)
	Total long-term debt	$	77,933		$	75,004

Employee_Stock_Plans_Tables

Employee Stock Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	Stock-based compensation expense related to all of the Company’s stock awards is included in operating expense categories, as follows:
			Years Ended December 31,
			2014				2013			2012
			(In thousands)
	Cost of revenue		$	523			$	692		$	445
	Sales and marketing		1,920				1,320			1,080
	General and administrative		6,390				4,998			3,596
	Product development		1,551				1,276			1,440
	Total		$	10,384			$	8,286		$	6,561
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 stock options granted during the period presented:
			Years Ended December 31,
			2014		2013		2012
	Expected volatility		51.10%		52.10%		59.10%
	Expected life of option		6.21 years		6.09 years		6.09 years
	Risk free interest rate		1.90%		1.30%		0.90%
	Expected dividend yield		0.00%		0.00%		0.00%
Schedule of Share-based Compensation, Stock Options, Activity	The following table summarizes non-vested stock option activity for the year ended December 31, 2014:
			Shares			Weighted Average Grant Date Fair Value
	Non-vested options outstanding at December 31, 2013		2,897,828			$	3.52
	Granted		419,699			4.86
	Vested		(1,156,724	)		3.74
	Forfeited		(298,016	)		3.95
	Non-vested options outstanding at December 31, 2014		1,862,787			$	3.62
	The following table summarizes stock option activity for the year ended December 31, 2014:
			Shares			Weighted Average Exercise Price
	Outstanding at December 31, 2013		5,210,384			$	6.74
	Granted		419,699			9.59
	Exercised		(525,999	)		4.61
	Forfeited		(415,828	)		10.71
	Outstanding at December 31, 2014		4,688,256			$	6.87
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, 2014:
			Options Outstanding					Options Exercisable
			Number of			Remaining		Number Exercisable		Remaining Weighted Average Life
			Options Outstanding			Weighted
						Average Life
	Exercise Prices:
	$1.59 - $4.73		1,186,726			6.67		771,054		6.18
	$5.14 - $7.89		2,559,540			7.29		1,673,864		7.17
	$8.08 - $11.57		606,999			9.23		70,857		8.75
	$12.00 - $25.89		334,991			5.87		309,694		5.82
			4,688,256					2,825,469
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,
		2014				2013			2012
	Weighted average grant date fair value for options granted during the period	$	4.86			$	3.55		$	2.68
	Total fair value of options vested (in thousands)	$	4,325			$	4,968		$	5,968
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	The following table summarizes RSA activity for the year ended December 31, 2014:
			Shares			Weighted Average Grant Date Fair Value
	Non-vested RSAs at December 31, 2013		557,982			$	4.79
	Granted		86,205			8.12
	Vested and exchanged for common stock		(79,535	)		8.62
	Non-vested RSAs at December 31, 2014		564,652			$	4.69
	The following table summarizes RSU activity for the year ended December 31, 2014:
			Shares			Weighted Average Grant Date Fair Value
	Non-vested RSUs at December 31, 2013		1,198,290			$	7.24
	Granted		1,228,649			9.22
	Vested		(458,363	)		7.25
	Forfeited		(202,671	)		8.47
	Non-vested RSUs at December 31, 2014		1,765,905			$	8.47

Net_Loss_per_Share_Tables

Net Loss per Share (Tables)	12 Months Ended
	Dec. 31, 2014
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,
		2014				2013			2012
	Numerator:
	Net loss (in thousands)	$	(26,496	)		$	(15,278	)	$	(17,380	)
	Denominator:
	Weighted-average shares used to compute basic net loss per share	55,932,641				55,135,657			54,352,536
	Effect of potentially dilutive securities:
	Options to purchase common stock	—				—			—
	Unvested shares of RSAs	—				—			—
	Unvested shares of RSUs	—				—			—
	Weighted-average shares used to compute diluted net income loss per share	55,932,641				55,135,657			54,352,536
	Net loss per share:
	Basic	$	(0.47	)		$	(0.28	)	$	(0.32	)
	Diluted	$	(0.47	)		$	(0.28	)	$	(0.32	)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The following outstanding options to purchase Common Stock, unvested shares under RSAs and unvested shares issuable upon settlement of RSUs were excluded from the computation of diluted net loss per share for the periods presented as their effect would have been anti-dilutive:
		Years Ended December 31,
		2014			2013			2012
	Options to purchase common stock	4,688,256			5,210,384			5,541,130
	Unvested shares of restricted stock awards	564,652			557,982			625,800
	Unvested shares of restricted stock units	1,765,905			1,198,290			446,456

Segment_and_Geographic_Informa1

Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2014
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,
		2014		2013		2012
		(In thousands)
	M&A	$	130,471	$	110,456	$	91,606
	Enterprise	96,711		95,246		94,616
	DCM	28,639		28,794		30,445
	Total revenue	$	255,821	$	234,496	$	216,667
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,
		2014		2013		2012
		(In thousands)
	Revenue:
	U.S.	$	146,317	$	137,603	$	131,487
	All other countries	109,504		96,893		85,180
	Total	$	255,821	$	234,496	$	216,667
		Years Ended December 31,
		2014		2013
		(In thousands)
	Long-lived assets (fixed assets and capitalized software):
	U.S.	$	54,380	$	45,702
	All other countries	1,663		739
	Total	$	56,043	$	46,441

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	At December 31, 2014, future minimum payments under non-cancelable operating leases were as follows over the next five years and thereafter:
	Years Ending December 31,	Amount
		(In thousands)
	2015	$	6,026
	2016	4,988
	2017	4,971
	2018	4,862
	2019	4,818
	Thereafter	15,305
	Total	$	40,970

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Sales commissions and fees	$19,200,000	$17,000,000	$13,400,000
Foreign currency transaction losses	1,900,000	300,000	-300,000
Impairment of capitalized software	$0	$0	$8,715,000
Computers and software
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Office equipment
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Minimum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Maximum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	11 years

Summary_of_Significant_Account4

Summary of Significant Accounting Policies-Goodwill and Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2014
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	12 years
Non-compete agreement
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Minimum | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 years
Maximum | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years

Investments_and_Fair_Value_Mea2

Investments and Fair Value Measurements (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Amortized Cost	24,455	34,886
Corporate Securities | Investments (current)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Amortized Cost	11,825	28,095
Corporate Securities | Investments (current) | Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held To Maturity Securities Maturity In Days	9 days	229 days
Corporate Securities | Investments (current) | Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held To Maturity Securities Maturity In Days	349 days	354 days
Corporate Securities | Investments (non-current)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Amortized Cost	12,630
Corporate Securities | Investments (non-current) | Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held To Maturity Securities Maturity In Days	380 days
Corporate Securities | Investments (non-current) | Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held To Maturity Securities Maturity In Days	567 days
Commercial Paper | Investments (current)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity Securities, Amortized Cost		6,791
Commercial Paper | Investments (current) | Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held To Maturity Securities Maturity In Days		176 days
Commercial Paper | Investments (current) | Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held To Maturity Securities Maturity In Days		354 days

Investments_and_Fair_Value_Mea3

Investments and Fair Value Measurements (Level 1, 2 and 3 Inputs) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost method investments	$3,500,000
Assets | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money Market Funds	13,851,000	5,031,000
Level 1 | Assets | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money Market Funds	13,851,000	5,031,000
Level 2 | Assets | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money Market Funds	0	0
Level 3 | Assets | Fair Value, Measurements, Recurring
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 (Acquisitions) (Details) (USD $)	12 Months Ended	0 Months Ended
	Dec. 31, 2014	Apr. 23, 2014
		installment
Goodwill [Roll Forward]
Balance as of December 31, 2013	$215,869,000
Acquisition of docTrackr, Inc.	8,514,000
Balance as of December 31, 2014	224,383,000
Business Acquisition [Line Items]
Goodwill	224,383,000
DocTrackr, Inc.
Goodwill [Roll Forward]
Balance as of December 31, 2014		8,500,000
Business Acquisition [Line Items]
Total consideration		10,500,000
Amount subject to holdback		1,500,000
Number of installments to release holdback		2
Holdback amount released, initial installment		500,000
Holdback amount released, second installment		1,000,000
Net tangible assets		100,000
Deferred tax liabilities		300,000
Goodwill		8,500,000
Weighted average useful life		4 years 8 months 12 days
Developed technology | DocTrackr, Inc.
Business Acquisition [Line Items]
Intangible assets acquired		1,900,000
Estimated useful life		5 years
Non-compete agreement
Business Acquisition [Line Items]
Estimated useful life	3 years
Non-compete agreement | DocTrackr, Inc.
Business Acquisition [Line Items]
Intangible assets acquired		$300,000
Estimated useful life		3 years

Goodwill_and_Other_Intangibles3

Goodwill and Other Intangibles (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other intangible assets [Line Items]
Goodwill	$224,383	$215,869
Components of Intangible Assets [Abstract]
Gross Carrying Value	292,481	290,283
Accumulated Amortization	-230,426	-206,635
Net Carrying Amount	62,055	83,648
Amortization of intangible assets	23,791	23,644	25,774
Customer relationships
Components of Intangible Assets [Abstract]
Gross Carrying Value	141,973	141,973
Accumulated Amortization	-106,944	-92,750
Net Carrying Amount	35,029	49,223
Developed technology
Components of Intangible Assets [Abstract]
Gross Carrying Value	134,542	132,642
Accumulated Amortization	-113,303	-105,096
Net Carrying Amount	21,239	27,546
Trade name
Components of Intangible Assets [Abstract]
Gross Carrying Value	14,629	14,629
Accumulated Amortization	-9,198	-7,980
Net Carrying Amount	5,431	6,649
Non-compete agreement
Components of Intangible Assets [Abstract]
Gross Carrying Value	1,337	1,039
Accumulated Amortization	-981	-809
Net Carrying Amount	356	230
Cost of revenue
Components of Intangible Assets [Abstract]
Amortization of intangible assets	8,206	8,136	10,369
Sales and marketing
Components of Intangible Assets [Abstract]
Amortization of intangible assets	14,195	14,198	14,175
General and administrative
Components of Intangible Assets [Abstract]
Amortization of intangible assets	$1,390	$1,310	$1,230

Goodwill_and_Other_Intangibles4

Goodwill and Other Intangibles (Future Amortization Expense) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
2015	$23,949
2016	23,866
2017	11,799
2018	1,629
2019	716
Thereafter	96
Net Carrying Amount	$62,055	$83,648

Fixed_Assets_Details

Fixed Assets (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Total fixed assets	$39,660	$40,711
Less: Accumulated depreciation and amortization	-23,415	-26,611
Fixed assets, net	16,245	14,100
Depreciation expense	6,598	5,148	5,011
Computer and office equipment and software [Member]
Property, Plant and Equipment [Line Items]
Total fixed assets	29,029	30,605
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total fixed assets	3,683	3,222
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Total fixed assets	$6,948	$6,884

Fixed_Assets_Depreciation_Expe

Fixed Assets Depreciation Expense (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Depreciation	$6,598	$5,148	$5,011
Cost of revenue
Property, Plant and Equipment [Line Items]
Depreciation	3,543	2,860	1,909
Sales and marketing
Property, Plant and Equipment [Line Items]
Depreciation	1,206	799	1,143
General and administrative
Property, Plant and Equipment [Line Items]
Depreciation	1,030	758	887
Product development
Property, Plant and Equipment [Line Items]
Depreciation	$819	$731	$1,072

Capitalized_Software_Details

Capitalized Software (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Research and Development [Abstract]
Capitalized software	$120,268	$96,478
Less: Accumulated amortization	-80,470	-64,137
Capitalized software, net	39,798	32,341
Finite-Lived Intangible Assets [Line Items]
Amortization computer software expense	19,029	15,716	13,556
Cost of revenue
Finite-Lived Intangible Assets [Line Items]
Amortization computer software expense	17,730	14,777	12,583
Sales and marketing
Finite-Lived Intangible Assets [Line Items]
Amortization computer software expense	323	206	215
General and administrative
Finite-Lived Intangible Assets [Line Items]
Amortization computer software expense	$976	$733	$758

Accrued_Expenses_and_Other_Cur2

Accrued Expenses and Other Current Liabilities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accrued Liabilities, Current [Abstract]
Sales commissions and bonuses	$15,687	$15,601
Other accrued expenses	11,287	11,066
Total accrued expenses and other current liabilities	$26,974	$26,667

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, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
U.S.	($29,065)	($21,375)	($28,325)
Non-U.S.	804	748	720
Net loss before income tax	($28,261)	($20,627)	($27,605)

Income_Tax_Income_Tax_Expense_

Income Tax (Income Tax Expense (Benefit)) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$181	$220	$52
State and local	-42	626	726
Foreign	2,804	2,143	1,852
Total current income tax expense	2,943	2,989	2,630
Deferred:
Federal	-4,248	-6,640	-10,396
State and local	-487	-1,483	-2,410
Foreign	27	-215	-49
Total deferred income tax benefit	-4,708	-8,338	-12,855
Total income tax benefit	($1,765)	($5,349)	($10,225)

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, 2014	Dec. 31, 2013	Dec. 31, 2012
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 of 35%	($9,891)	($7,219)	($9,662)
State taxes, net of federal income tax effect	-1,186	-557	-1,356
Stock-based compensation expense	622	1,886	-440
Non-deductible expenses	759	438	212
Foreign taxes	2,043	1,348	1,251
Research and development credit	-647	-1,008	-78
Other	88	-237	-152
Valuation allowance	6,447	0	0
Total income tax benefit	($1,765)	($5,349)	($10,225)
Effective tax rate	6.20%	25.90%	37.00%

Income_Tax_Component_of_Deferr

Income Tax (Component of Deferred Tax Assets and Liabilities) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets:
Net operating loss carryforwards	$10,008	$13,673
Research and development tax credit carryforwards	8,185	7,244
Stock-based compensation	5,529	4,249
Accrued expenses	4,108	3,948
AMT tax credit carryforwards	1,727	1,546
Allowance for doubtful accounts	1,264	1,255
Other	4,275	3,595
Total deferred tax assets	35,096	35,510
Valuation allowance	-6,447	0
Deferred tax assets, net of valuation allowance	28,649	35,510
Deferred tax liabilities:
Depreciation and amortization	-28,649	-40,351
Total deferred tax liabilities	-28,649	-40,351
Net deferred tax assets (liabilities), net of valuation allowance	$0	($4,841)

Income_Tax_Unrecognized_Tax_Be

Income Tax (Unrecognized Tax Benefits) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning balance	$3,945	$3,335	$3,161
Additions based on tax positions related to the current year	540	389	168
Additions for prior year tax positions	289	221	6
Reductions from expirations of applicable statutes of limitations	-86	0	0
Ending balance	$4,688	$3,945	$3,335

Income_Tax_Narrative_Details

Income Tax (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$40.90
Net operating loss carryforwards, attributable to windfall tax benefits related to equity compensation	13.4
Unrecognized tax benefits that would impact effective tax rate	4
Accrued Penalties and Interest	0.5
Penalties and Interest Expense	0.3	0.03	0.03
Income tax examination, foreign losses disallowed		58.3
Research Tax Credit Carryforward [Member] | Internal Revenue Service (IRS) [Member]
Income Tax [Line Items]
Tax credit carryforward	8.9
Research Tax Credit Carryforward [Member] | State and Local Jurisdiction [Member]
Income Tax [Line Items]
Tax credit carryforward	$4.80

Debt_Details

Debt (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Jun. 15, 2007	Jun. 30, 2011
In Thousands, unless otherwise specified
Long-term Debt, by Current and Noncurrent [Abstract]
Other financing arrangements	$106	$315
Total debt	78,839	75,213
Total long-term debt	77,933	75,004
Term Loan
Long-term Debt, by Current and Noncurrent [Abstract]
First Lien Agreement (First Lien Credit Facility)	79,400	0
Term Loan Credit Facility original issue discount	-667	0
First Lien Credit Facility
Long-term Debt, by Current and Noncurrent [Abstract]
First Lien Agreement (First Lien Credit Facility)	0	74,898	135,000
Less: current portion	-800	0
Other Financing Arrangements
Long-term Debt, by Current and Noncurrent [Abstract]
Other financing arrangements				1,200
Less: current portion	($106)	($209)

Debt_Narrative_Details

Debt (Narrative) (Details) (USD $)	12 Months Ended	1 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2011	Jun. 30, 2011	Feb. 24, 2014	Jun. 20, 2014	Dec. 31, 2013	Jun. 15, 2007	Jun. 19, 2014	Jun. 30, 2014	Jun. 30, 2013
Long-term Debt, Other Disclosures [Abstract]
Fair value of long-term debt	$78,700,000					$75,000,000
Letters of credit outstanding, amount	3,200,000
Determination period after fiscal year for covent compliance	90 days
Payment period	105 days
Other financing arrangements	106,000					315,000
First Lien Credit Facility
Long-term Debt, Other Disclosures [Abstract]
Basis spread	4.50%
Interest rate percentage at end of period						6.00%
First Lien Agreement (First Lien Credit Facility)	0					74,898,000	135,000,000
Minimum interest rate	1.50%
Other Financing Arrangements
Long-term Debt, Other Disclosures [Abstract]
Debt Issuance Cost	2,800,000
Other financing arrangements			1,200,000
Amortization of financing costs and discounts		200,000	100,000
Financing arrangement terms		25 months	50 months
Term Loan | First Lien Credit Facility
Long-term Debt, Other Disclosures [Abstract]
Face amount				80,000,000
Debt instrument, term				5 years
Principal payment percentage				0.25%
LIBOR | Term Loan | First Lien Credit Facility
Long-term Debt, Other Disclosures [Abstract]
Minimum variable rate (as a percent)				2.00%
Basis spread				5.25%
Interest rate percentage at end of period				7.25%
Revolving Credit Facility
Long-term Debt, Other Disclosures [Abstract]
Revolving line of credit maximum					15,000,000			10,000,000
Revolving Credit Facility | First Lien Credit Facility
Long-term Debt, Other Disclosures [Abstract]
Line of credit, borrowing base, percentage of accounts receivable				85.00%
Commitment fee percentage				0.50%
Revolving Credit Facility | Amended Revolving Credit Facility [Member]
Long-term Debt, Other Disclosures [Abstract]
Line of credit, borrowing base, percentage of accounts receivable					50.00%
Revolving Credit Facility | Eurodollar | First Lien Credit Facility
Long-term Debt, Other Disclosures [Abstract]
Basis spread				2.50%
Secured Debt
Long-term Debt, Other Disclosures [Abstract]
Revolving line of credit maximum										2,500,000
Collateral amount									2,400,000
Other assets (current) | Other Financing Arrangements
Long-term Debt, Other Disclosures [Abstract]
Unamortized debt issuance expense	600,000
Other assets (non-current) | Other Financing Arrangements
Long-term Debt, Other Disclosures [Abstract]
Unamortized debt issuance expense	$1,800,000

Common_Stock_Details

Common Stock (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Shareholder vote needed to increase shares authorized, minimum, percent of issued and outstanding shares	75.00%
Shares held by entities associated with TA Associates, L.P. and Rho Capital Partners, Inc.	15,849,337
Common Stock
Class of Stock [Line Items]
Shares authorized	300,000,000	300,000,000
Common stock par value	0.001	$0.00
Issued shares, common	57,084,340	56,054,484
Shares outstanding	57,084,340	56,054,484

Employee_Stock_Plans_Stock_Bas

Employee Stock Plans (Stock Based Compensation) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$10,384	$8,286	$6,561
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	523	692	445
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1,920	1,320	1,080
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	6,390	4,998	3,596
Product development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$1,551	$1,276	$1,440

Employee_Stock_Plans_Black_Sch

Employee Stock Plans (Black Scholes Pricing Model - Options) (Details) (Stock Options)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	51.10%	52.10%	59.10%
Expected life of option	6 years 2 months 15 days	6 years 1 month 2 days	6 years 1 month 2 days
Risk free interest rate	1.90%	1.30%	0.90%
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, 2014	Dec. 31, 2013	Dec. 31, 2012
Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value, options granted	$4.86	$3.55	$2.68
Vested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, beginning balance (in shares)	5,210,384
Options granted (in shares)	419,699
Options exercised (in shares)	-525,999
Options forfeited (in shares)	-415,828
Options outstanding, ending balance (in shares)	4,688,256
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, beginning balance	$6.74
Weighted average exercise price, options granted	$9.59
Weighted average exercise price, options exercised	$4.61
Weighted average exercise price, options forfeited	$10.71
Weighted average exercise price, ending balance	$6.87
Non-Vested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, beginning balance (in shares)	2,897,828
Options granted (in shares)	419,699
Options vested (in shares)	-1,156,724
Options forfeited (in shares)	-298,016
Options outstanding, ending balance (in shares)	1,862,787
Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value, beginning balance	$3.52
Weighted average grant date fair value, options granted	$4.86
Weighted average grant date fair value, options vested	$3.74
Weighted average grant date fair value, options forfeited	$3.95
Weighted average grant date fair value, ending balance	$3.62

Employee_Stock_Plans_Exercise_

Employee Stock Plans (Exercise Price Range) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number of Options Outstanding	4,688,256
Options Exerciseable, Number Exercisable	2,825,469
$1.59 - $4.73
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$1.59
Exercise Price Range, Upper Range Limit	$4.73
Options Outstanding, Number of Options Outstanding	1,186,726
Options Outstanding, Remaining Weighted Average Life	6 years 8 months 1 day
Options Exerciseable, Number Exercisable	771,054
Options Exerciseable, Remaining Weighted Average Life	6 years 2 months 5 days
$5.14 - $7.89
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$5.14
Exercise Price Range, Upper Range Limit	$7.89
Options Outstanding, Number of Options Outstanding	2,559,540
Options Outstanding, Remaining Weighted Average Life	7 years 3 months 15 days
Options Exerciseable, Number Exercisable	1,673,864
Options Exerciseable, Remaining Weighted Average Life	7 years 2 months 1 day
$8.08 - $11.57
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$8.08
Exercise Price Range, Upper Range Limit	$11.57
Options Outstanding, Number of Options Outstanding	606,999
Options Outstanding, Remaining Weighted Average Life	9 years 2 months 23 days
Options Exerciseable, Number Exercisable	70,857
Options Exerciseable, Remaining Weighted Average Life	8 years 9 months
$12.00 - $25.89
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range Limit	$12
Exercise Price Range, Upper Range Limit	$25.89
Options Outstanding, Number of Options Outstanding	334,991
Options Outstanding, Remaining Weighted Average Life	5 years 10 months 13 days
Options Exerciseable, Number Exercisable	309,694
Options Exerciseable, Remaining Weighted Average Life	5 years 9 months 26 days

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, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted average grant date fair value for options granted during the period (usd per share)	$4.86	$3.55	$2.68
Total fair value of options vested	$4,325	$4,968	$5,968

Employee_Stock_Plans_Restricte

Employee Stock Plans (Restricted Stock) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock Awards (RSAs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Non-vested oustanding, beginning balance (in shares)	557,982
Granted (in shares)	86,205
Vested (in shares)	-79,535
Non-vested oustanding, ending balance (in shares)	564,652	557,982
Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value, beginning balance	$4.79
Weighted average grant date fair value, granted	$8.12	$9.19	$4.24
Weighted average grant date fair value, vested	$8.62
Weighted average grant date fair value, ending balance	$4.69	$4.79
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Non-vested oustanding, beginning balance (in shares)	1,198,290
Granted (in shares)	1,228,649
Vested (in shares)	-458,363
Forfeited (in shares)	-202,671
Non-vested oustanding, ending balance (in shares)	1,765,905	1,198,290
Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value, beginning balance	$7.24
Weighted average grant date fair value, granted	$9.22	$7.36	$4.70
Weighted average grant date fair value, vested	$7.25
Weighted average grant date fair value, forfeited	$8.47
Weighted average grant date fair value, ending balance	$8.47	$7.24

Employee_Stock_Plans_Disclosur

Employee Stock Plans (Disclosure) (Details) (USD $)	12 Months Ended			36 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 28, 2013	Apr. 23, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit from compensation expense	$3,700,000	$2,800,000	$1,800,000
Intrinsic value of options exercised	2,500,000	1,000,000	1,500,000
Stock-based compensation expense	10,384,000	8,286,000	6,561,000
Issuance of restricted common stock	86,205	76,167	709,292
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value outstanding	25,500,000	31,000,000
Aggregate intrinsic value exercisable	16,000,000	14,100,000
Unrecognized compensation cost, options	6,000,000	9,200,000
Weighted average period of recognizing share based compensation expenses (years)	2 years 2 months 10 days	2 years 8 months 10 days
Cash received from exercise of stock options	2,400,000	1,600,000	600,000
Tax benefit realized from exercise of stock options	900,000	400,000	600,000
Expected life of option	6 years 2 months 15 days	6 years 1 month 2 days	6 years 1 month 2 days
Expected volatility	51.10%	52.10%	59.10%
Risk free interest rate	1.90%	1.30%	0.90%
Expected dividend yield	0.00%	0.00%	0.00%
Restricted Stock Awards (RSAs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value outstanding	6,700,000	6,800,000
Unrecognized compensation costs	500,000	1,200,000
Weighted average period of recognizing share based compensation expenses (years)	0 years 8 months	1 year
Weighted average grant date fair value, granted	$8.12	$9.19	$4.24
Fair value of vested shares	700,000	700,000	900,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value outstanding	21,000,000	14,500,000
Weighted average period of recognizing share based compensation expenses (years)	2 years 8 months 15 days	3 years 2 months 13 days
Weighted average grant date fair value, granted	$9.22	$7.36	$4.70
Fair value of vested shares	4,600,000	1,500,000	1,100,000
Fair Value of market based award					2,100,000
Unrecognized compensation expense	$11,300,000	$7,000,000
2010 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	3,631,173
2010 Equity Incentive Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years			10 years
Award vesting period	4 years			4 years 6 months
Award vesting percentage	25.00%			25.00%

Employee_Stock_Plans_Disclosur1

Employee Stock Plans (Disclosure CEO Stock Awards) (Details) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 01, 2012	Feb. 04, 2014	Apr. 23, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of restricted common stock	86,205	76,167	709,292
Stock-based compensation expense	$10,384,000	$8,286,000	$6,561,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of market based award						2,100,000
Chief Executive Officer | Market Based Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of market based award				2,100,000
Expected life				3 years 9 months 18 days
Expected volatility	60.32%
Risk free interest rate	0.72%
Expected dividend yield	0.00%
Chief Executive Officer | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value of market based award					$1,300,000
Expected life					1 year 3 months 17 days
Expected volatility					46.48%
Risk free interest rate					1.46%
Expected dividend yield					0.00%
Non-Employee | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of restricted common stock						83,914

Employee_Stock_Plans_Disclosur2

Employee Stock Plans (Disclosure Continued) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$10,384,000	$8,286,000	$6,561,000
Modified Awards
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 | Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	1,000,000
Purchase price, percentage of fair value	85.00%
Shares reserved for future issuance	1,000,000
Shares issued	546,644
Shares available for future issuance	453,356

Net_Loss_per_Share_Details

Net Loss per Share (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Weighted Average Number Diluted Shares Outstanding Adjustment Abstract [Line Items]
Net (loss)	($26,496)	($15,278)	($17,380)
Weighted-average shares used to compute basic net (loss) income per share	55,932,641	55,135,657	54,352,536
Weighted-average shares used to compute diluted net (loss) income per share	55,932,641	55,135,657	54,352,536
Earnings Per Share, Basic [Abstract]
Basic (in dollars per share)	($0.47)	($0.28)	($0.32)
Diluted (in dollars per share)	($0.47)	($0.28)	($0.32)
Options to purchase common stock
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	4,688,256	5,210,384	5,541,130
Unvested shares of RSAs
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	564,652	557,982	625,800
Unvested shares of RSUs
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	1,765,905	1,198,290	446,456

Segment_and_Geographic_Informa2

Segment and Geographic Information (Narrative) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$255,821	$234,496	$216,667
U.S.
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	57.20%
Revenues	146,317	137,603	131,487
All other countries
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	42.80%
Revenues	109,504	96,893	85,180
United Kingdom
Segment Reporting Information [Line Items]
Revenues	$34,800	$31,100	$25,400
United Kingdom | Geographic Concentration Risk | Revenue
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	13.60%	13.20%	11.70%

Segment_and_Geographic_Informa3

Segment and Geographic Information (Products and Services) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue from External Customer [Line Items]
Revenues	$255,821	$234,496	$216,667
U.S.
Revenue from External Customer [Line Items]
Revenues	146,317	137,603	131,487
All other countries
Revenue from External Customer [Line Items]
Revenues	109,504	96,893	85,180
M&A
Revenue from External Customer [Line Items]
Revenues	130,471	110,456	91,606
Enterprise
Revenue from External Customer [Line Items]
Revenues	96,711	95,246	94,616
DCM
Revenue from External Customer [Line Items]
Revenues	$28,639	$28,794	$30,445

Segment_and_Geographic_Informa4

Segment and Geographic Information (Geographic Location) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$56,043	$46,441
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	54,380	45,702
All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$1,663	$739

Related_Party_Transactions_Det

Related Party Transactions (Details) (Affiliates of TA Associates, Inc., USD $)	Dec. 31, 2014
Affiliates of TA Associates, Inc.
Related Party Transaction [Line Items]
Due from Related Parties	$0

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	$6,026,000
2016	4,988,000
2017	4,971,000
2018	4,862,000
2019	4,818,000
Thereafter	15,305,000
Total	40,970,000
Operating leases, expense	6,600,000	5,500,000	5,200,000
Lease with New York Landlord
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating leases, period of free rent	12 months
Allowance from landlord for office improvements and other payments, utilized	1,900,000
Lease with New York Landlord | Office Building
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Area leased (in sq. ft.)	43,304
Leases term	10 years
Lease with Massachusetts Landlord
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating leases, period of free rent	3 months
Allowance from landlord for office improvements and other payments, utilized	$2,300,000
Lease with Massachusetts Landlord | Office Building
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Area leased (in sq. ft.)	51,325
Leases term	10 years 3 months

Schedule_II_Valudation_and_Qua1

Schedule II - Valudation and Qualifying Accounts (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$3,152	$2,927	$2,149
Additions Charged to Expenses/Against Revenue	17,147	7,722	8,061
Deductions	-10,694	-7,497	-7,283
Balance at End of Period	9,605	3,152	2,927
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	1,252	1,502	724
Additions Charged to Expenses/Against Revenue	2,126	1,028	1,713
Deductions	-2,120	-1,278	-935
Balance at End of Period	1,258	1,252	1,502
Credit reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	1,900	1,425	1,425
Additions Charged to Expenses/Against Revenue	8,574	6,694	6,348
Deductions	-8,574	-6,219	-6,348
Balance at End of Period	1,900	1,900	1,425
Deferred tax asset valuation allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	0
Additions Charged to Expenses/Against Revenue	6,447
Deductions	0
Balance at End of Period	$6,447