Broadsoft (BSFT) 10-K 29 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 25, 2016	Jun. 30, 2015
Document Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Trading Symbol	BSFT
Entity Registrant Name	BROADSOFT, INC.
Entity Central Index Key	1,086,909
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		29,125,129
Entity Public Float			$ 1,000,199,083

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 175,857	$ 101,543
Short-term investments	72,531	68,923
Accounts receivable, net of allowance for doubtful accounts of $85 and $286 at December 31, 2015 and December 31, 2014, respectively	108,113	81,794
Other current assets	13,155	12,272
Total current assets	369,656	264,532
Long-term assets:
Property and equipment, net	19,481	14,363
Long-term investments	102,385	52,030
Intangible assets, net	18,835	15,568
Goodwill	72,275	65,303
Deferred tax assets	1,661	17,074
Other long-term assets	8,081	7,281
Total long-term assets	222,718	171,619
Total assets	592,374	436,151
Current liabilities:
Accounts payable and accrued expenses	28,667	20,787
Deferred revenue, current portion	106,483	87,423
Total current liabilities	135,150	108,210
Convertible senior notes	188,331	95,628
Deferred revenue	4,571	14,033
Other long-term liabilities	7,289	5,319
Total liabilities	$ 335,341	$ 223,190
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $0.01 par value per share; 5,000,000 shares authorized at December 31, 2015 and December 31, 2014; no shares issued and outstanding at December 31, 2015 and December 31, 2014	$ 0	$ 0
Common stock, par value $0.01 per share; 100,000,000 shares authorized at December 31, 2015 and December 31, 2014; 29,080,197 and 28,943,336 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively	291	290
Additional paid-in capital	333,153	258,169
Accumulated other comprehensive loss	(13,810)	(7,712)
Accumulated deficit	(62,601)	(37,786)
Total stockholders’ equity	257,033	212,961
Total liabilities and stockholders’ equity	$ 592,374	$ 436,151

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 85	$ 286
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	29,080,197	28,943,336
Common stock, shares outstanding (in shares)	29,080,197	28,943,336

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue:
License software									$ 119,808	$ 103,311	$ 94,408
Subscription and maintenance support									112,836	92,492	69,357
Professional services and other									46,199	21,054	14,728
Total revenue	$ 89,591	$ 69,097	$ 64,484	$ 55,671	$ 65,826	$ 54,629	$ 52,484	$ 43,918	278,843	216,857	178,493
Cost of revenue:
License software									10,231	9,755	8,867
Subscription and maintenance support									38,602	32,984	20,359
Professional services and other									28,925	14,955	10,415
Total cost of revenue									77,758	57,694	39,641
Gross profit	69,724	47,451	44,249	39,661	51,035	39,420	37,607	31,101	201,085	159,163	138,852
Operating expenses:
Sales and marketing									83,806	69,471	56,822
Research and development									60,749	50,125	45,271
General and administrative									41,287	32,993	29,992
Total operating expenses									185,842	152,589	132,085
Income from operations	20,624	822	(4,928)	(1,275)	11,260	1,879	564	(7,129)	15,243	6,574	6,767
Other expense:
Interest expense, net									9,386	7,177	6,946
Other, net									5,714	1,300	(148)
Total other expense, net									15,100	8,477	6,798
Income (loss) before income taxes									143	(1,903)	(31)
Benefit from income taxes									(36)	(2,199)	(406)
Net income	$ 11,622	$ (3,250)	$ (5,288)	$ (2,905)	$ 7,687	$ (2,758)	$ 1,506	$ (6,139)	$ 179	$ 296	$ 375
Net income per common share:
Basic (in dollars per share)	$ 0.40	$ (0.11)	$ (0.18)	$ (0.10)	$ 0.27	$ (0.10)	$ 0.05	$ (0.22)	$ 0.01	$ 0.01	$ 0.01
Diluted (in dollars per share)	$ 0.39	$ (0.11)	$ (0.18)	$ (0.10)	$ 0.26	$ (0.10)	$ 0.05	$ (0.22)	$ 0.01	$ 0.01	$ 0.01
Weighted average common shares outstanding:
Basic (in shares)									29,113	28,654	28,116
Diluted (in shares)									29,818	29,365	28,711
Stock-based compensation expense included above:
Stock-based compensation expense									$ 40,444	$ 30,273	$ 27,432
Cost of revenue
Stock-based compensation expense included above:
Stock-based compensation expense									7,227	3,862	3,122
Sales and marketing
Stock-based compensation expense included above:
Stock-based compensation expense									13,821	9,856	8,984
Research and development
Stock-based compensation expense included above:
Stock-based compensation expense									11,844	10,164	8,800
General and administrative
Stock-based compensation expense included above:
Stock-based compensation expense									$ 7,552	$ 6,391	$ 6,526

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 179	$ 296	$ 375
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(5,418)	(6,061)	1,478
Unrealized gain (loss) on investments	(680)	(126)	5
Total other comprehensive income (loss), net of tax	(6,098)	(6,187)	1,483
Comprehensive income (loss)	$ (5,919)	$ (5,891)	$ 1,858

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Par Value $0.01 Per Share	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance at beginning of period at Dec. 31, 2012	$ 158,585	$ 279	$ 199,771	$ (3,008)	$ (38,457)
Balance at beginning of period, shares at Dec. 31, 2012		27,913
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for exercise of stock options and vesting of RSUs, net of effect of early exercise of stock options and withholding tax	(1,691)	$ 4	(1,695)
Issuance of common stock for exercise of stock options and vesting of RSUs, net of effect of early exercise of stock options and withholding tax (in shares)		392
Stock-based compensation expense	27,432		27,432
Tax windfall benefits on exercises of stock options	6,675		6,675
Foreign currency translation adjustment	1,478			1,478
Unrealized gain (loss) on investments	5			5
Net income	375				375
Balance at end of period at Dec. 31, 2013	192,859	$ 283	232,183	(1,525)	(38,082)
Balance at end of period, shares at Dec. 31, 2013		28,305
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for exercise of stock options and vesting of RSUs, net of effect of early exercise of stock options and withholding tax	(7,085)	$ 7	(7,092)
Issuance of common stock for exercise of stock options and vesting of RSUs, net of effect of early exercise of stock options and withholding tax (in shares)		638
Stock-based compensation expense	30,225		30,225
Tax windfall benefits on exercises of stock options	2,853		2,853
Foreign currency translation adjustment	(6,061)			(6,061)
Unrealized gain (loss) on investments	(126)			(126)
Net income	296				296
Balance at end of period at Dec. 31, 2014	$ 212,961	$ 290	258,169	(7,712)	(37,786)
Balance at end of period, shares at Dec. 31, 2014		28,943
Common stock, par value (in dollars per share)	$ 0.01
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for exercise of stock options and vesting of RSUs, net of effect of early exercise of stock options and withholding tax	$ (4,110)	$ 9	(4,119)
Issuance of common stock for exercise of stock options and vesting of RSUs, net of effect of early exercise of stock options and withholding tax (in shares)		928
Repurchase of common stock	(25,002)	$ (8)			(24,994)
Repurchase of common stocks, shares		(791)
Equity component of 2022 convertible senior notes issuance, net of issuance costs	67,792		67,792
Equity component of 2018 convertible senior notes repurchase	(6,751)		(6,751)
Deferred tax liability related to convertible senior notes, net	(23,503)		(23,503)
Stock-based compensation expense	40,938		40,938
Tax windfall benefits on exercises of stock options	627		627
Foreign currency translation adjustment	(5,418)			(5,418)
Unrealized gain (loss) on investments	(680)			(680)
Net income	179				179
Balance at end of period at Dec. 31, 2015	$ 257,033	$ 291	$ 333,153	$ (13,810)	$ (62,601)
Balance at end of period, shares at Dec. 31, 2015		29,080
Common stock, par value (in dollars per share)	$ 0.01

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 179	$ 296	$ 375
Adjustment to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	15,836	12,391	7,822
Amortization of software licenses	2,848	3,342	2,987
Stock-based compensation expense	40,444	30,273	27,432
Provision for doubtful accounts	4	274	149
Provision for (benefit from) deferred income taxes	(2,741)	(3,477)	(2,055)
Excess tax benefits related to stock-based compensation	(1,809)	(2,950)	(7,492)
Payment of original notes issuance discount	(1,094)	0	0
Non-cash interest expense on convertible senior notes	8,617	5,906	5,504
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(23,935)	(14,806)	(16,334)
Other current and long-term assets	(4,896)	(4,056)	(1,128)
Accounts payable, accrued expenses and other long-term liabilities	2,234	4,655	(1,799)
Current and long-term deferred revenue	9,099	22,911	16,473
Net cash provided by operating activities	44,786	54,759	31,934
Cash flows from investing activities:
Purchases of property and equipment	(12,876)	(10,523)	(5,789)
Payments for acquisitions, net of cash acquired	(21,172)	(3,650)	(37,793)
Purchases of marketable securities	(252,467)	(122,991)	(117,067)
Proceeds from sale of marketable securities	128,827	10,000	0
Proceeds from maturities of marketable securities	69,677	109,042	103,240
Change in restricted cash		564	3
Net cash used in investing activities	(88,011)	(17,558)	(57,406)
Cash flows from financing activities:
Proceeds from the exercise of stock options	6,187	710	1,285
Taxes paid on vesting of RSUs	(10,297)	(7,795)	(2,977)
Excess tax benefits related to stock-based compensation	1,809	2,950	7,492
Repurchase of common stock	(25,002)	0	0
Proceeds from issuance of 2022 convertible senior notes, net of issuance costs	194,822	0	0
Repurchase of 2018 convertible senior notes	(48,601)	0	0
Notes payable and bank loans—payments	0	0	(969)
Net cash provided by (used in) financing activities	118,918	(4,135)	4,831
Effect of exchange rate changes on cash and cash equivalents	(1,379)	(1,389)	(38)
Net increase (decrease) in cash and cash equivalents	74,314	31,677	(20,679)
Cash and cash equivalents, beginning of period	101,543	69,866	90,545
Cash and cash equivalents, end of period	175,857	101,543	69,866
Supplemental disclosures:
Cash paid for interest	1,418	1,801	1,895
Cash paid for income taxes	2,377	1,678	422
Change in accounts payable and accrued expenses for purchase of property and equipment	$ 2,153	$ 688	$ 528

Nature of Business

Nature of Business	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	Nature of Business BroadSoft, Inc. (“BroadSoft” or the “Company”), a Delaware corporation, was formed in 1998. The Company is the leading global provider of software and services that enable telecommunications service providers to deliver hosted, cloud-based Unified Communications, or UC, to their enterprise customers.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Principles of Consolidation The accompanying consolidated financial statements include the accounts and results of operations of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in the accompanying consolidated financial statements. Use of Estimates The preparation of financial statements in conformity with United States generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual amounts could differ from these estimates. Cash Equivalents and Restricted Cash The Company considers all highly liquid instruments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents are held in money market accounts. Restricted cash consists primarily of certificates of deposit that are securing letters of credit related to operating leases for office space. The Company had an immaterial amount of long-term restricted cash at December 31, 2015 and December 31, 2014 . Investments in Marketable Securities Marketable debt securities that the Company does not intend to hold to maturity are classified as available-for-sale, are carried at fair value and are included on the Company’s consolidated balance sheet as either short-term or long-term investments depending on their maturity. Investments with original maturities greater than three months that mature less than one year from the consolidated balance sheet date are classified as short-term investments. Investments with maturities greater than one year from the consolidated balance sheet date are classified as long-term investments. Available-for-sale investments are marked-to-market at the end of each reporting period, with unrealized holding gains or losses, which represent temporary changes in the fair value of the investment, reflected in accumulated other comprehensive income (loss), a separate component of stockholders’ equity. The Company’s primary objective when investing excess cash is preservation of principal. The following table summarizes the Company's investments: December 31, 2015 December 31, 2014 Contracted Maturity Carrying Value Contracted Maturity Carrying Value (in thousands) (in thousands) Money market funds demand $ 123,170 demand $ 56,847 Total cash equivalents 123,170 56,847 U.S. agency notes 50 - 365 days 39,467 77 - 240 days 14,078 Corporate bonds 12 - 319 days 33,064 42 - 357 days 54,845 Total short-term investments 72,531 68,923 U.S. agency notes 486 - 851 days 44,175 415 - 868 days 37,178 Corporate bonds 376 - 846 days 58,210 377 - 502 days 14,852 Total long-term investments $ 102,385 $ 52,030 The following table summarizes the Company's investments at December 31, 2015 (in thousands): Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. agency notes $ 83,977 $ — $ (334 ) $ 83,643 Corporate bonds 91,537 2 (266 ) 91,273 Total investments $ 175,514 $ 2 $ (600 ) $ 174,916 The following table summarizes the Company's investments at December 31, 2014 (in thousands): Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. agency notes $ 51,270 $ 13 $ (26 ) $ 51,257 Corporate bonds 69,786 4 (94 ) 69,696 Total investments $ 121,056 $ 17 $ (120 ) $ 120,953 Fair Value Measurements The following table summarizes the carrying and fair value of the Company’s financial assets (in thousands): December 31, 2015 December 31, 2014 Carrying Value Fair Value Carrying Value Fair Value Assets Cash equivalents and certificates of deposit * $ 123,170 $ 123,170 $ 56,864 $ 56,864 Short and long-term investments 174,916 174,916 120,953 120,953 Total assets $ 298,086 $ 298,086 $ 177,817 $ 177,817 * Excludes $52.7 million and $21.6 million of operating cash balances as of December 31, 2015 and 2014 , respectively. The carrying amounts of the Company’s other financial instruments, accounts receivable, accounts payable and accrued expenses, approximate their respective fair values due to their short term nature. (See Note 9 Borrowings for additional information on fair value of debt.) The Company uses a three-tier fair value measurement hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis, as well as assets and liabilities measured at fair value on a non-recurring basis, in periods subsequent to their initial measurement. The three tiers are defined as follows: • Level 1 . Observable inputs based on unadjusted quoted prices in active markets for identical instruments and include the Company’s investments in money market funds and certificates of deposit; • Level 2 . Inputs valued using quoted market prices for similar instruments, nonbinding market prices that are corroborated by observable market data and include the Company’s investments and marketable securities in U.S. agency notes, commercial paper and corporate bonds; and • Level 3 . Unobservable inputs for which there is little or no market data, which require the Company to develop its own assumptions. Assets Measured at Fair Value on a Recurring Basis The Company evaluates its financial assets subject to fair value measurements on a recurring basis to determine the appropriate level of classification for each reporting period. This determination requires significant judgments to be made. There were no transfers between classification levels during the periods. The following table summarizes the values (in thousands): December 31, Level 1 Level 2 Level 3 Money market funds $ 123,170 $ 123,170 $ — $ — Total cash equivalents and certificates of deposit * 123,170 123,170 — — U.S. agency notes 83,643 — 83,643 — Corporate bonds 91,273 — 91,273 — Total investments 174,916 — 174,916 — Total cash equivalents, certificates of deposit and investments $ 298,086 $ 123,170 $ 174,916 $ — December 31, Level 1 Level 2 Level 3 Money market funds $ 56,847 $ 56,847 $ — $ — Certificates of deposit 17 17 — — Total cash equivalents and certificates of deposit * 56,864 56,864 — — U.S. agency notes 51,257 — 51,257 — Corporate bonds 69,696 — 69,696 — Total investments 120,953 — 120,953 — Total cash equivalents, certificates of deposit and investments $ 177,817 $ 56,864 $ 120,953 $ — * Excludes $52.7 million and $21.6 million of operating cash balances as of December 31, 2015 and 2014 , respectively. Assets Measured at Fair Value on a Nonrecurring Basis The Company measures certain assets, including property and equipment, goodwill and intangible assets, at fair value on a nonrecurring basis. These assets are recognized at fair value when they are deemed to be impaired. During the years ended December 31, 2015 , 2014 and 2013 , there were no assets or liabilities measured at fair value on a nonrecurring basis subsequent to their initial recognition. Concentration of Credit Risk Financial instruments that subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities and accounts receivable. All of the Company’s cash and cash equivalents and marketable securities are held at financial institutions that management believes to be of high credit quality. The Company’s cash and cash equivalent accounts may exceed federally insured limits at times. The Company has not experienced any losses on cash and cash equivalents to date. To manage accounts receivable risk, the Company evaluates the creditworthiness of its customers and maintains an allowance for doubtful accounts. The following customer represented 10% or more of revenue for the periods presented: Year Ended December 31, 2015 2014 2013 Revenue Company A * 13 % * * Represented less than 10% Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable are derived from sales to customers. Each customer is evaluated for creditworthiness through a credit review process at the time of each order. Accounts receivable are stated at realizable value, net of an allowance for doubtful accounts that is maintained for estimated losses that would result from the inability of some customers to make payments as they become due. The allowance is based on an analysis of past due amounts and ongoing credit evaluations. Collection experience has been consistent with the Company’s estimates. Property and Equipment Property and equipment are stated at cost, less accumulated depreciation and amortization. Replacements and major improvements are capitalized; maintenance and repairs are charged to expense as incurred. Depreciation is calculated using the straight-line method over the estimated useful lives of the related assets per the table below: Equipment 3 years Software 1.5 - 3 years Furniture and fixtures 5 years Leasehold improvements are amortized over the shorter of the term of the lease and the estimated useful life of the assets. Business Combinations In a business combination, the Company allocates the purchase price to the acquired business’ identifiable assets and liabilities at their acquisition date fair values. The excess of the purchase price over the amount allocated to the identifiable assets and liabilities, if any, is recorded as goodwill. The excess, if any, of the fair value of the identifiable assets acquired and liabilities assumed over the consideration transferred is recognized as a gain within other income in the consolidated statement of operations as of the acquisition date. To date, the assets acquired and liabilities assumed in the Company’s business combinations have primarily consisted of acquired working capital, definite-lived intangible assets and goodwill. The carrying value of acquired working capital approximates its fair value, given the short-term nature of these assets and liabilities. The Company estimates the fair value of definite-lived intangible assets acquired using a discounted cash flow approach, which includes an analysis of the future cash flows expected to be generated by such assets and the risk associated with achieving such cash flows. The key assumptions used in the discounted cash flow model include the discount rate that is applied to the discretely forecasted future cash flows to calculate the present value of those cash flows and the estimate of future cash flows attributable to the acquired intangible, which include revenue, operating expenses and taxes. The Company's estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the fair value of assets acquired and liabilities assumed, with the corresponding offset to goodwill. Goodwill Goodwill represents the excess of (a) the aggregate of the fair value of consideration transferred in a business combination, over (b) the fair value of assets acquired, net of liabilities assumed. Goodwill is not amortized, but is subject to annual impairment tests as described below. The Company tests goodwill for impairment annually on December 31, or more frequently if events or changes in business circumstances indicate the asset might be impaired. The Company may first assess qualitative factors to determine if it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test included in U.S. GAAP. To the extent the assessment identifies adverse conditions, or if the Company elects to bypass the qualitative assessment, goodwill is tested for impairment at the reporting unit level using a two-step approach. The first step is to compare the fair value of the reporting unit to the carrying value of the net assets assigned to the reporting unit. If the fair value of the reporting unit is greater than the carrying value of the net assets assigned to the reporting unit, the assigned goodwill is not considered impaired. If the fair value is less than the reporting unit’s carrying value, step two is performed to measure the amount of the impairment, if any. In the second step, the fair value of goodwill is determined by deducting the fair value of the reporting unit’s identifiable assets and liabilities from the fair value of the reporting unit as a whole, as if the reporting unit had just been acquired and the purchase price were being initially allocated. If the carrying value of goodwill exceeds the implied fair value, an impairment charge would be recorded to operating expenses in the consolidated statement of operations in the period the determination is made. The Company has determined that it has one reporting unit, BroadSoft, Inc., which is the consolidated entity. Based on the Company’s completion of the first step of the two-step goodwill impairment test, there was no indication of impairment as of December 31, 2015 , 2014 or 2013 . (See Note 4 Goodwill and Intangibles. ) Identifiable Intangible Assets The Company acquired intangible assets in connection with certain of its business acquisitions. These assets were recorded at their estimated fair values at the acquisition date and are amortized over their respective estimated useful lives using a method of amortization that reflects the pattern in which the economic benefits of the intangible assets are used. Estimated useful lives are determined based on the Company’s historical use of similar assets and the expectation of future realization of revenue attributable to the intangible assets. In those cases where the Company determines that the useful life of an intangible asset should be shortened, the Company amortizes the net book value in excess of the estimated salvage value over its revised remaining useful life. The Company did not revise the useful life estimates attributed to any of the Company’s intangible assets during the years ended December 31, 2015 , 2014 or 2013 . (See Note 4 Goodwill and Intangibles .) The estimated useful lives used in computing amortization are as follows: Customer relationships 3 - 8 years Developed technology 2 - 6 years Tradenames 1 - 7 years Impairment of Long-Lived Assets The Company reviews long-lived assets, including property and equipment and definite-lived intangible assets, for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of the assets to future undiscounted net cash flows expected to be generated by the assets. Recoverability measurement and estimating of undiscounted cash flows for assets to be held and used is done at the lowest possible levels for which there are identifiable cash flows. If such assets are considered impaired, the amount of impairment recognized would be equal to the amount by which the carrying amount of the assets exceeds the fair value of the assets, which the Company would compute using a discounted cash flow approach. Assets to be disposed of are recorded at the lower of the carrying amount or fair value less costs to sell. There was no impairment of long-lived assets during the years ended December 31, 2015 , 2014 or 2013 . Deferred Financing Costs The Company amortizes deferred financing costs using the effective-interest method and records such amortization as interest expense. Revenue Recognition The Company’s revenue is generated from the sales of software licenses and related maintenance for those licenses, subscription and usage fees related to the cloud offering and professional services. The Company’s software licenses, subscription and maintenance contracts and professional services are sold directly through its own sales force and indirectly through distribution partners. License Software Revenue from software licenses is recognized when the following four basic criteria are met as follows: • Persuasive evidence of an arrangement. For direct sales, an agreement signed by the Company and by the customer, in conjunction with a non-cancelable purchase order or executed sales quote from the customer, is deemed to represent persuasive evidence of an arrangement. For sales through distribution partners, a purchase order or executed sales quote, in conjunction with a reseller agreement with the distribution partner and evidence of the distribution partner's customer, is deemed to represent persuasive evidence of an arrangement. Revenue is deferred for sales through a distribution partner without proof of the distribution partner's customer. • Delivery has occurred. Delivery is deemed to have occurred when the customer is given electronic access to the licensed software and a license key for the software has been delivered or made available. If an arrangement contains a requirement to deliver additional elements essential to the functionality of the delivered element, revenue associated with the arrangement is recognized when delivery of the final element has occurred. • Fees are fixed or determinable. The Company considers the fee to be fixed or determinable unless the fee is subject to refund or adjustment or is not payable within normal payment terms. If the fee is subject to refund or adjustment, revenue is recognized when the refund or adjustment right lapses. If payment terms exceed the Company’s normal terms, revenue is recognized as the amounts become due and payable or upon the receipt of cash if collection is not probable. • Collection is probable. Each customer is evaluated for creditworthiness through a credit review process at the inception of an arrangement. Collection is deemed probable if, based upon the Company’s evaluation, the Company expects that the customer will be able to pay amounts under the arrangement as payments become due. If it is determined that collection is not probable, revenue is deferred and recognized upon cash collection. The warranty period for the Company’s licensed software is generally 90 days . The Company delivers its licensed software primarily by utilizing electronic media. Revenue includes amounts billed for shipping and handling and such amounts represent an immaterial amount of revenue. Cost of license software revenue includes shipping and handling costs. Subscription and Maintenance Support The Company typically sells annual maintenance support contracts in combination with license software sales. Maintenance support enables the customer to continue receiving software maintenance and support after the warranty period has expired. Maintenance support is renewable at the option of the customer. When customers prepay for annual maintenance support, the related revenue is deferred and recognized ratably over the term of the maintenance period. Generally, rates for maintenance support, including subsequent renewal rates, are established based upon a specific percentage of net license fees as set forth in the arrangement. Maintenance support typically includes the right to unspecified product upgrades on an if-and-when available basis. The Company’s subscription revenue is generated from a recurring fee and/or a usage based fee from customers purchasing the Company's cloud offering. Under these arrangements, the Company is generally paid a recurring fee calculated based on the number of seats and type of service purchased or a usage fee based on the actual number of transactions. Revenue related to the recurring fee is recognized ratably over the contract term beginning with the date our service is made available to the customer. The usage fee is recognized as revenue in the period in which the transactions occur. Subscription agreements do not provide customers with the right to take possession of the underlying software at any time. Professional Services and Other Revenue from professional services includes implementation, training and consulting fees. Professional services are generally either daily-rate or fixed-fee arrangements. Revenue from daily-rate arrangements is typically recognized as services are performed. Revenue related to fixed-fee arrangements are typically recognized upon completion of all of the deliverables. Services are generally not considered essential to the functionality of the licensed software. Costs related to shipping and handling and billable travel expenses are included in cost of revenue. Multiple Element Arrangements The Company accounts for multiple element arrangements that consist of software and software-related services, collectively referred to as “software elements,” in accordance with industry specific accounting guidance for software and software-related transactions. For such transactions, the Company generally allocates revenue to the software license by determining the fair value of the undelivered elements, which is usually maintenance support and professional services. The Company establishes vendor-specific objective evidence ("VSOE") of the fair value of the maintenance support based on the renewal price as stated in the agreement and as charged in the first optional renewal period under the arrangement. VSOE for professional services is determined based on an analysis of our historical daily rates when these professional services are sold separately from the software license. For the Company's cloud offering with multiple element arrangements that include subscription and professional services, the Company allocates revenue to all deliverables based on their relative selling prices. In such circumstances, the Company uses the following hierarchy to determine the selling price to be used for allocating revenue to deliverables (a) vendor-specific objective evidence of fair value, (b) third-party evidence of selling price and (c) best estimate of the selling price. Best estimate of selling price reflects the Company’s estimates of what the selling prices of elements would be if they were sold on a stand-alone basis. Factors considered by the Company in developing relative selling prices for products and services include the discounting practices, price lists, go-to-market strategy, historical standalone sales and contract prices. Research and Development Research and development expenses consist primarily of personnel and related expenses for the Company's research and development staff, including salaries, benefits, bonuses and stock-based compensation and the cost of certain third-party contractors. Research and development costs, other than software development expenses qualifying for capitalization, are expensed as incurred. Software Development Costs Software development costs for software to be sold, leased or marketed that is incurred prior to the establishment of technological feasibility are expensed as incurred as research and development expense. Software development costs incurred subsequent to the establishment of technological feasibility, if any, are capitalized until the software is available for general release to customers. The Company has determined that technological feasibility has been established at approximately the same time as the general release of such software to customers. Therefore, to date, the Company has not capitalized any related software development costs. Internal-Use Software Development Costs The Company capitalizes costs associated with customized internal-use software systems that have reached the application development stage. Such capitalized costs include costs directly associated with the development of the applications. Capitalization of such costs begins when the preliminary project stage is complete and ceases at the point the project is substantially complete and is ready for its intended purpose. Internal-use software is amortized on a straight-line basis over the estimated useful life. Costs incurred during the preliminary development stage, as well as maintenance and training costs, are expensed as incurred. The Company capitalized $2.2 million and $1.9 million in internal-use software during the years ended December 31, 2015 and 2014 , respectively. Capitalized internal-use software is included in property and equipment. The Company recorded amortization expense related to these assets of approximately $1.5 million , $0.7 million and $0.2 million during the years ended December 31, 2015 , 2014 and 2013 , respectively. Deferred Revenue Deferred revenue represents amounts billed to or collected from customers for which the related revenue has not been recognized because one or more of the revenue recognition criteria have not been met. The current portion of deferred revenue is expected to be recognized as revenue within 12 months from the balance sheet date. Deferred revenue consists of the following (in thousands): December 31, December 31, License software $ 33,200 $ 26,495 Subscription and maintenance support 61,399 52,764 Professional services and other 16,455 22,197 Total $ 111,054 $ 101,456 Current portion $ 106,483 $ 87,423 Non-current portion 4,571 14,033 Total $ 111,054 $ 101,456 Cost of Revenue Cost of revenue includes (a) royalties and other fees paid to third parties whose technology or products are sold as part of the Company’s products, (b) direct costs to manufacture and distribute product, (c) direct costs to provide product support and professional support services, (d) direct costs associated with delivery of the Company's cloud offering and (e) amortization expense related to acquired intangible assets. Income Taxes The Company uses the liability method of accounting for income taxes as set forth in the authoritative guidance for accounting for income taxes. This method requires an asset and liability approach for the recognition of deferred tax assets and liabilities for the expected future tax consequences attributable to temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and their respective tax bases, and for operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured by applying enacted statutory tax rates applicable to the future years in which deferred amounts are expected to be settled or realized. The Company currently has significant deferred tax assets, primarily resulting from net operating loss carryforwards, deferred revenue and stock-based compensation expense. The Company has a valuation allowance of approximately $0.3 million against its net deferred tax assets. Management weighs the positive and negative evidence to determine if it is more likely than not that some or all of the deferred tax assets will be realized. The Company accounts for uncertainty in income taxes using a two-step approach to recognize and measure tax benefits when the realization of the benefits is uncertain. The first step is to determine whether the benefit is to be recognized; the second step is to determine the amount to be recognized. Income tax benefits should be recognized when, based on the technical merits of a tax position, the entity believes that if a dispute arose with the taxing authority and were taken to a court of last resort, it is more likely than not (i.e., a probability of greater than 50 percent) that the tax position would be sustained as filed. If a position is determined to be more likely than not of being sustained, the reporting enterprise should recognize the largest amount of tax benefit that is greater than 50 percent likely of being realized upon ultimate settlement with the taxing authority. The Company’s practice is to recognize interest and penalties related to income tax matters in income tax expense. Stock-Based Compensation The Company applies the fair value method for determining the cost of stock-based compensation for employees, directors and consultants. Under this method, the total cost of a stock option grant is measured based on the estimated fair value of the stock option award at the date of the grant, using a binomial options pricing model, or binomial lattice model. The fair value of a restricted stock unit ("RSU") is based on the market value of the Company’s common stock on the date of grant. The fair value of a performance stock unit ("PSU") is based on the market price of the Company’s stock on the date of grant and assumes that the performance criteria will be met and the target payout level will be achieved. Compensation cost is adjusted for subsequent changes in the outcome of performance-related conditions until the award vests. The fair value of a performance stock unit with a market condition is estimated on the date of award, using a Monte Carlo simulation model to estimate the total return ranking of the Company’s stock in relation to the target index of companies over each performance period. Compensation cost on performance shares with a market condition is not adjusted for subsequent changes regardless of the level of ultimate vesting. For service only awards, the total cost related to the portion of awards granted that is ultimately expected to vest is recognized as stock-based compensation expense on a straight-line basis over the requisite service period of the grant. For performance based awards, the total cost related to the portion of the awards granted that is ultimately expected to vest is recognized as stock-based compensation expense on a graded basis over the requisite service period of the grant. Estimated Fair Value of Share-Based Payments The binomial lattice model considers certain characteristics of fair value option pricing that are not considered under the Black-Scholes model. Stock-based awards are combined into one grouping for purposes of valuation assumptions. Fair value of the stock options was estimated at the grant date, using the following weighted average assumptions: Year ended December 31, 2015 2014 2013 Average assumptions: Risk-free interest rate 1.5 % 1.7 % 1.5 % Expected dividend yield — % — % — % Expected volatility 52 % 53 % 56 % Expected term (years) 6.9 years 7.6 years 7.5 years The Company has assumed no dividend yield because dividends are not expected to be paid in the near future, which is consistent with the Company’s history of not paying dividends. The risk-free interest rate assumption is based upon observed interest rates for constant maturity U.S. Treasury securities appropriate for the term of the Company’s employee stock options. The expected life of an option is derived from the binomial lattice model, and is based on several factors, including the contract life, exercise factor, post-vesting termination rate and volatility. The expected exercise factor, which is the ratio of the fair value of common stock on the expected exercise date to the exercise price, and expected post-vesting termination rate, which is the expected rate at which employees are likely to terminate after vesting occurs, are based on an analysis of actual historical and expected behavior by option holders and analysis of comparable public companies. Expected volatility is based on the historical volatility of the Company and comparable public companies. The Company’s estimate of pre-vesting forfeitures, or forfeiture rate, is based on an analysis of historical behavior by option holders. The estimated forfeiture rate is applied to the total estimated fair value of the awards, as derived from the binomial lattice model, to compute the stock-based compensation expense, net of pre-vesting forfeitures, to be recognized in the consolidated statements of operations. Net Income Per Common Share Basic net income per common share is computed based on the weighted average number of outstanding shares of common stock. Diluted income per common share adjusts the basic weighted average common shares outstanding for the potential dilution that could occur if stock options, RSUs and convertible securities were exercised or converted into common stock. The following table presents a reconciliation of the numerator and denominator of the basic and diluted earnings per share computation. In the table below, net income represents the numerator and weighted average common shares outstanding represents the denominator: Year Ended December 31, 2015 2014 2013 (in thousands, except per share data) Net income $ 179 $ 296 $ 375 Weighted average basic common shares outstanding 29,113 28,654 28,116 Dilutive effect of stock-based awards 705 711 595 Weighted average diluted common shares outstanding 29,818 29,365 28,711 Earnings per share: Basic $ 0.01 $ 0.01 $ 0.01 Diluted $ 0.01 $ 0.01 $ 0.01 Due to the cash settlement feature of the principal a

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Acquisitions	Acquisitions mPortal Inc. On June 3, 2015, the Company completed its acquisition of all of the stock of mPortal Inc. ("mPortal"), a professional services company, renamed BroadSoft Design, Inc. The acquisition enabled the Company to offer its customers the ability to deliver customizable UC experiences to a wide range of business end users. The total consideration paid for mPortal was $ 14.8 million . The Company funded the acquisition with $14.3 million of cash on hand and $0.5 million of restricted stock units. The Company incurred $0.7 million of transaction costs for financial advisory and legal services related to the acquisition that are included in general and administrative expenses as incurred, in the Company’s consolidated statements of operations for the year ended December 31, 2015. The consolidated financial statements include the results of mPortal from the date of acquisition. The purchase price has been allocated to the assets acquired and liabilities assumed based on fair values as of the acquisition date. The following table summarizes the fair value of the assets acquired and liabilities assumed at the acquisition date of June 3, 2015 (in thousands): Cash and cash equivalents $ 2,748 Accounts receivable 1,920 Prepaid and other assets 293 Deferred tax assets 2,404 Property and equipment 15 Customer relationships 5,600 Goodwill 2,497 Accounts payable and accrued expenses (677 ) Total consideration $ 14,800 Customer relationships represent the fair value of the underlying relationships and agreements with mPortal customers. The customer relationships intangible asset is being amortized on a straight-line basis over a period of eight years, which in general reflects the cash flows generated. The excess of purchase consideration over the fair value of the net tangible and identifiable intangible assets acquired of $2.5 million was recorded as goodwill. The goodwill balance is attributable to the assembled workforce and the synergies expected as a result of the acquisition. In accordance with U.S. GAAP, goodwill associated with this acquisition will not be amortized but will be tested for impairment on an annual basis. Goodwill associated with this acquisition is not deductible for tax purposes. finocom AG On December 16, 2013, the Company completed its acquisition of all outstanding shares of finocom AG ("finocom"), a provider of cloud-delivered IP-based communication services. The acquisition enabled the Company to extend its BroadCloud delivery platform to customers in Germany, and other select European markets. The total cash consideration paid for finocom was $9.7 million . The Company funded the acquisition with cash on hand. The Company incurred $0.5 million of transaction costs for financial advisory and legal services related to the acquisition that are included in general and administrative expenses as incurred, in the Company’s consolidated statements of operations for the year ended December 31, 2013. The consolidated financial statements include the results of finocom from the date of acquisition. The purchase price has been allocated to the assets acquired and liabilities assumed based on fair values as of the acquisition date. The following table summarizes the fair value of the assets acquired and liabilities assumed at the acquisition date of December 16, 2013 (in thousands): Accounts receivable $ 243 Prepaid expenses and other assets 7 Deferred tax asset 1,080 Property and equipment 64 Trade name 275 Customer relationships 2,610 Developed technology 1,236 Goodwill 5,686 Deferred tax liability (1,322 ) Accounts payable and accrued expenses (199 ) Total consideration $ 9,680 The trade name represents the fair value of the finocom trade name that the Company intends to use for a fixed period of time. Customer relationships represent the fair value of the underlying relationships and agreements with finocom customers. Developed technology represents the fair value of finocom's intellectual property. The trade name, customer relationships and developed technology are being amortized on a straight-line basis over a period of seven years, eight years and five years, respectively, which in general reflects the cash flows generated from such assets. The weighted-average amortization period for depreciable intangible assets acquired is approximately seven years. The excess of purchase consideration over the fair value of the net tangible and identifiable intangible assets acquired of $5.7 million was recorded as goodwill. The goodwill balance is attributable to the assembled workforce and the expected synergies, including complementary products that enhance the Company's overall product portfolio. In accordance with U.S. GAAP, goodwill associated with this acquisition will not be amortized but will be tested for impairment on an annual basis. Goodwill associated with this acquisition is not deductible for tax purposes. HIPCOM On August 12, 2013, the Company completed its acquisition of all outstanding shares of Hosted IP Communications (Europe) Limited ("HIPCOM"), a provider of hosted business VoIP services. The acquisition enabled the Company to extend its BroadCloud delivery platform to customers in the United Kingdom, and other select European markets. The total cash consideration paid for HIPCOM was $26.3 million . The Company funded the acquisition with cash on hand. The Company incurred $0.5 million of transaction costs for financial advisory and legal services related to the acquisition that are included in general and administrative expenses as incurred, in the Company’s consolidated statements of operations for the year ended December 31, 2013 . The consolidated financial statements include the results of HIPCOM from the date of acquisition. The purchase price has been allocated to the assets acquired and liabilities assumed based on fair values as of the acquisition date. The following table summarizes the fair value of the assets acquired and liabilities assumed at the acquisition date of August 12, 2013 (in thousands): Cash and cash equivalents $ 215 Accounts receivable 1,187 Other current assets 289 Property and equipment 311 Trade name 310 Customer relationships 7,128 Developed technology 465 Goodwill 18,280 Deferred tax liability, net (966 ) Accounts payable and accrued expenses (876 ) Total consideration $ 26,343 The trade name represents the fair value of the HIPCOM trade name that the Company intends to use for a fixed period of time. Customer relationships represent the fair value of the underlying relationships and agreements with HIPCOM customers. Developed technology represents the fair value of HIPCOM's intellectual property. The trade name, customer relationships and developed technology are being amortized on a straight-line basis over a period of one year, seven years and two years, respectively, which in general reflects the estimated cash flows to be generated from such assets. The weighted-average amortization period for depreciable intangible assets acquired is approximately six years. The excess of purchase consideration over the fair value of the net tangible and identifiable intangible assets acquired of $18.3 million was recorded as goodwill. The goodwill balance is attributable to the assembled workforce and the expected synergies, including complementary products that enhance the Company's overall product portfolio. In accordance with U.S. GAAP, goodwill associated with this acquisition will not be amortized but will be tested for impairment on an annual basis. Goodwill associated with this acquisition is not deductible for tax purposes. Pro Forma Financial Information for Acquisitions of mPortal, finocom and HIPCOM (unaudited) The businesses acquired in 2015 contributed aggregate revenue of $7.6 million and net losses of $0.8 million for the period from the relevant acquisition date to December 31, 2015. The businesses acquired in 2013 contributed aggregate revenue of $2.8 million and net losses of $0.3 million for the period from the acquisition date to December 31, 2013. The acquisitions the Company completed in 2014 were not considered to be material, individually or in the aggregate. The unaudited pro forma statements of operations data below gives effect to the acquisitions as if they had occurred as of the beginning of the comparable prior annual reporting period. The following data includes adjustments for amortization of intangibles and acquisition costs. The pro forma information as presented below is for informational purposes only and is not necessarily indicative of the results of operations that would have been achieved if the acquisitions had been in effect for the periods presented. Year ended December 31, 2015 2014 2013 (In thousands except per share data) Revenue $ 284,292 $ 233,576 $ 184,383 Net income (loss) 1,852 (1,311 ) (98 ) Net income (loss) per common share, basic $ 0.06 $ (0.05 ) $ 0.00 Net income (loss) per common share, diluted $ 0.06 $ (0.05 ) $ 0.00

Goodwill and Intangibles

Goodwill and Intangibles	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangibles	Goodwill and Intangibles The Company has concluded it has a single reporting unit. Accordingly, on an annual basis management performs the impairment assessment required under FASB guidelines at the consolidated enterprise level. The Company performed an impairment test of the Company’s goodwill and determined that no impairment of goodwill existed at December 31, 2015 , 2014 or 2013 . The following table provides a summary of the changes in the carrying amounts of goodwill (in thousands): Balance, December 31, 2013 $ 65,192 Increase in goodwill related to acquisitions 2,974 Foreign currency translations (2,863 ) Balance, December 31, 2014 65,303 Increase in goodwill related to acquisitions 9,123 Foreign currency translations (2,151 ) Balance, December 31, 2015 $ 72,275 For the year ended December 31, 2015 , the increase in "goodwill related to acquisitions" consists of $3.3 million of goodwill related to the immaterial acquisition of a hosted voice over IP (VoIP) OSS provider in January 2015, $2.5 million of goodwill related to the acquisition of mPortal in June 2015 and $3.3 million of goodwill related to the immaterial acquisition of a cloud-based communications provider in Japan in November 2015. For the year ended December 31, 2014, the increase in "goodwill related to acquisitions" consists of $3.0 million of goodwill related to the immaterial acquisition of a software and services provider to the hospitality industry in August 2014. The Company’s acquired intangible assets are subject to amortization. The following is a summary of intangible assets (in thousands): December 31, 2015 December 31, 2014 Gross Carrying Amount Accumulated Amortization Net Amount Gross Carrying Amount Accumulated Amortization Net Amount Customer relationships $ 17,571 $ 3,721 $ 13,850 $ 14,532 $ 5,281 $ 9,251 Developed technology 13,277 8,489 4,788 13,072 7,031 6,041 Trade name 298 101 197 323 47 276 Total $ 31,146 $ 12,311 $ 18,835 $ 27,927 $ 12,359 $ 15,568 Amortization expense on intangible assets was approximately $5.8 million , $5.4 million and $3.9 million in 2015 , 2014 and 2013 , respectively. In addition, in 2015 , 2014 and 2013 , the Company retired $5.9 million , $1.3 million and $1.1 million of fully amortized intangible assets, respectively, impacting both the gross carrying amount and accumulated amortization by this amount. As of December 31, 2015 , future amortization expense on intangible assets is expected to be as follows (in thousands): 2016 $ 5,177 2017 4,098 2018 2,767 2019 2,389 2020 1,924 2021 and thereafter 2,480 Total amortization expense $ 18,835

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment consists of the following (in thousands): December 31, 2015 2014 Equipment $ 26,767 $ 18,754 Software 11,460 7,580 Furniture and fixtures 1,645 1,213 Leasehold improvements 5,605 4,437 45,477 31,984 Less accumulated depreciation and amortization (25,996 ) (17,621 ) Property and equipment, net $ 19,481 $ 14,363 Depreciation and amortization expense related to property and equipment for the years ended December 31, 2015 , 2014 and 2013 was approximately $9.8 million , $7.0 million and $3.9 million , respectively.

Accounts payable and other curr

Accounts payable and other current liabilities	12 Months Ended
	Dec. 31, 2015
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accounts payable and other current liabilities	Accounts payable and other current liabilities Accounts payable and other current liabilities consist of the following (in thousands): December 31, 2015 2014 Accounts payable and accrued expenses $ 12,102 $ 8,038 Accrued compensation 11,670 9,428 Other 4,895 3,321 $ 28,667 $ 20,787

Software Licenses

Software Licenses	12 Months Ended
	Dec. 31, 2015
Deferred Revenue Disclosure [Abstract]
Software Licenses	Software Licenses The Company has entered into an agreement with a third-party that provides the Company the right to distribute its software on an unlimited basis through May 2016. In May 2015, the Company amended this agreement to extend the term of the agreement from May 2016 to December 2020. For the period from June 2012 to May 2016, the Company has a fixed cost associated with these distribution rights of $10.2 million , which is being amortized to cost of revenue over the four -year period beginning in June 2012, based on the straight line method. For the period from June 2016 to December 2020, the Company will have a fixed cost associated with these distribution rights of $17.3 million , and to the extent annual billed license software revenue over the extended term exceeds $850 million , the Company would be required to pay additional fees. The cost of $17.3 million will be amortized to cost of revenue over the extended term beginning June 2016 (the expiration date of the previous agreement), based on the straight line method. Amortization expense related to these agreements was approximately $2.6 million , $2.6 million and $2.6 million for each of the years ended December 31, 2015 , 2014 and 2013 , respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The following table presents the components of the income before income taxes and the provision for (benefit from) income taxes (in thousands): Year ended December 31, 2015 2014 2013 Income (loss) before income taxes: United States $ (1,488 ) $ (4,769 ) $ (974 ) Foreign 1,631 2,866 943 Income (loss) before income taxes $ 143 $ (1,903 ) $ (31 ) Provision for (benefit from) income taxes: Current: Federal and state $ 965 $ 4,718 $ 7,718 Foreign 3,244 1,726 1,423 Total current $ 4,209 $ 6,444 $ 9,141 Deferred: Federal and state $ (4,018 ) $ (5,360 ) $ (10,249 ) Foreign (227 ) (3,283 ) 702 Total deferred $ (4,245 ) $ (8,643 ) $ (9,547 ) Provision for (benefit from) income taxes $ (36 ) $ (2,199 ) $ (406 ) The following table presents the components of net deferred tax assets (liabilities) and the related valuation allowance (in thousands): December 31, 2015 2014 Deferred tax assets: Net operating loss carry-forward $ 2,509 $ 4,004 Deferred revenue 8,296 10,149 Depreciation and amortization 1,428 1,847 Research tax credit carry-forward 2,869 417 Accrued expenses 2,927 2,720 Stock based compensation 8,181 6,066 Other 7,726 4,077 Total deferred tax assets $ 33,936 $ 29,280 Valuation allowance (312 ) (264 ) Net deferred tax assets $ 33,624 $ 29,016 Deferred tax liabilities: Acquired intangibles $ (6,181 ) $ (4,448 ) Convertible debt discount (28,213 ) (8,717 ) Other (537 ) (69 ) Total deferred tax liabilities $ (34,931 ) $ (13,234 ) Net deferred tax assets $ (1,307 ) $ 15,782 The Company has $35.9 million and $39.2 million of U.S. net operating loss carryforwards as of December 31, 2015 and 2014, respectively. Additionally, the Company has $11.1 million and $6.0 million of tax credit carryforwards for tax return purposes as of December 31, 2015 and 2014, respectively. The U.S. net operating loss and tax credit carryforwards are scheduled to begin to expire in 2018 and 2019, respectively. The Company has excluded certain U.S. net operating loss carryforwards from the calculation of deferred tax assets presented above, as they represent excess stock option deductions that do not reduce the Company’s income taxes payable. The excess tax benefits associated with stock option exercises and restricted stock vesting are recorded directly to stock holders equity when realized. The Company uses a “with-and-without” method to determine the tax benefit realized from excess stock option deductions under the FASB's updated authoritative guidance on share-based payments. Accordingly, the Company recognizes the benefits of carryforwards in the following order: (a) net operating losses from items other than excess stock option deductions; (b) other tax credit carryforwards from items other than excess stock option deductions; and (c) net operating losses from excess stock option deductions. The amount of excess tax benefits not included in the deferred tax assets were $17.9 million and $16.7 million as of December 31, 2015 and 2014, respectively. As of December 31, 2015, the excess tax benefits not recognized are related to net operating losses of $35.9 million (tax effect of $13.9 million ), foreign tax credits of $2.5 million and research and development tax credits of $1.5 million . The tax effect of these unrealized excess tax benefits, when realized in the future, will result in an increase to additional paid-in capital rather than a reduction to the results of operations. Utilization of net operating loss and tax credit carryforwards may be subject to annual limitations due to the ownership change limitations as provided by the Internal Revenue Code of 1986, as amended. The Company has not recorded a deferred tax liability for undistributed earnings of $8.8 million of certain foreign subsidiaries, since such earnings are considered to be reinvested indefinitely. If the earnings were distributed, the Company would be subject to federal income and foreign withholding taxes. Determination of an unrecognized deferred income tax liability with respect to such earnings is not practicable. A deferred tax asset should be reduced by a valuation allowance if, based on the weight of all available evidence, it is more likely than not (a likelihood of more than 50%) that some portion or the entire deferred tax asset will not be realized. The valuation allowance should be sufficient to reduce the deferred tax asset to the amount that is more likely than not to be realized. The determination of whether a deferred tax asset is realizable is based on weighting all available evidence, including both positive and negative evidence. The realization of deferred tax assets, including carryforwards and deductible temporary differences, depends upon the existence of sufficient taxable income of the same character during the carryback or carryforward period. The accounting guidance requires the consideration of all sources of taxable income available to realize the deferred tax asset, including the future reversal of existing temporary differences, future taxable income exclusive of reversing temporary differences and carryforwards, taxable income in carryback years and tax-planning strategies. As of December 31, 2015 , the Company has a remaining valuation allowance of approximately $0.3 million , which primarily relates to certain foreign NOLs and capital losses that are not more likely than not to be realized. The Company will continue to evaluate the need for a valuation allowance in foreign jurisdictions and may remove the valuation allowance in subsequent periods, which may have an impact on the results of operations. The following table presents the provisions for income taxes compared with income taxes based on the federal statutory tax rate of 35% (in thousands): Year ended December 31, 2015 2014 2013 Tax provision (benefit) based on federal statutory rate $ 50 $ (666 ) $ (11 ) State taxes 490 430 617 Impact of foreign operations 201 (508 ) (157 ) Other permanent items 144 193 697 IRC 162(m) add back 222 456 — Stock based compensation 1,096 1,002 (132 ) Change in income tax valuation allowance 16 (2,804 ) 333 Business tax credits (2,302 ) (2,314 ) (1,829 ) Finland intellectual property transfer (324 ) (81 ) — Meals and entertainment 432 198 168 Acquisition costs 248 128 188 Change in tax rates (309 ) 1,767 (280 ) Provision for (benefit from) income taxes $ (36 ) $ (2,199 ) $ (406 ) The Company has separately disclosed the tax effect of items in excess of $0.2 million . Accounting for Uncertainty in Income Taxes The Company applies guidance for uncertainty in income taxes that requires the application of a more likely than not threshold to the recognition and de-recognition of uncertain tax positions. If the recognition threshold is met, this guidance permits the Company to recognize a tax benefit measured at the largest amount of the tax benefit that, in the Company’s judgment, is more likely than not to be realized upon settlement. During the year ended December 31, 2013, the Company's unrecognized income tax benefits increased primarily due to tax exposures in certain foreign jurisdictions. Such exposures, if realized, would be offset by foreign tax credits in the U.S. During the years ended December 31, 2014 and 2012, there was no material adjustment in the liability for unrecognized income tax benefits and no new material tax positions for which the tax benefit was not recognized. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands): Year ended December 31, 2015 2014 2013 Unrecognized tax benefits balance at January 1, $ 4,619 $ 4,875 $ 821 Additions for tax positions of prior years 866 243 4,054 Settlements of tax positions of prior years (558 ) (499 ) — Unrecognized tax benefits balance at December 31, $ 4,927 $ 4,619 $ 4,875 The Company records interest and penalties as a component of its income tax provision. The Company recorded interest and penalties of $0.1 million for the year ended December 31, 2015 and 2013. The Company had not accrued interest with respect to uncertain tax positions in the prior years because unfavorable resolution of those positions would not result in cash tax due for those prior years. The Company files income tax returns in the United States and in various foreign jurisdictions. The Company is no longer subject to U.S. Federal income tax examinations for years prior to 2010, with the exception that operating loss or tax credit carryforwards generated prior to 2009 may be subject to tax audit adjustment. The Company is no longer subject to state and local or foreign income tax examinations by tax authorities for years prior to 2008.

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Borrowings	Borrowings 2022 Convertible Senior Notes In September 2015, the Company issued $201.3 million aggregate principal amount of 1.00% convertible senior notes due in 2022 (the “2022 Notes”). The 2022 Notes are general unsecured obligations of the Company, with interest payable semi-annually in cash at a rate of 1.00% per annum, and will mature on September 1, 2022 , unless earlier converted, redeemed or repurchased. The 2022 Notes may be converted by the holders at their option on any day prior to the close of business on the business day immediately preceding June 1, 2022 only under the following circumstances: (a) during any calendar quarter commencing after the calendar quarter ending on December 31, 2015 (and only during such calendar quarter), if the last reported sale price of the common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (b) during the five business day period after any ten consecutive trading day period (the “measurement period”) in which the trading price, as defined in the indenture governing the 2022 Notes (the "2022 Indenture"), per $1,000 principal amount of 2022 Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company's common stock and the conversion rate on each such trading day; (c) if the Company calls any or all of the 2022 Notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the relevant redemption date; or (d) upon the occurrence of specified corporate events. The 2022 Notes will be convertible, regardless of the foregoing circumstances, at any time from, and including, June 1, 2022 through the second scheduled trading day immediately preceding the maturity date. The initial conversion rate for the 2022 Notes is 25.8249 shares of the Company’s common stock per $1,000 principal amount of 2022 Notes, equivalent to a conversion price of approximately $38.72 per share of common stock. The conversion rate will be subject to adjustment in some events, but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date or if the Company issues a notice of redemption on or after September 1, 2019 as described below, the Company will increase the conversion rate for a holder who elects to convert its 2022 Notes in connection with such a corporate event or during the related redemption period in certain circumstances. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company's common stock or a combination of cash and shares of the Company's common stock, at the Company's election. It is the Company's current intent to settle conversions through combination settlement with a specified dollar amount per $1,000 principal amount of 2022 Notes of $1,000 . While the 2022 Notes were not convertible as of December 31, 2015 , if the 2022 Notes were convertible, no shares would have been distributed upon conversion because the conversion price was above the stock price as of such date. Holders of the 2022 Notes may require the Company to repurchase some or all of the 2022 Notes for cash upon a fundamental change, as defined in the 2022 Indenture, at a repurchase price equal to 100% of the principal amount of the 2022 Notes being repurchased, plus any accrued and unpaid interest up to, but excluding, the relevant repurchase date. The Company may not redeem the 2022 Notes prior to September 1, 2019. Beginning September 1, 2019, the Company may redeem for cash all or a portion of the 2022 Notes, at the Company's option, if the last reported sale price of the common stock is equal to or greater than 140% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending within the five trading days immediately preceding the date on which the Company provides notice of redemption, at a redemption price equal to 100% of the principal amount of the 2022 Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the 2022 Notes. The Company has separately accounted for the liability and equity components of the convertible debt instrument by allocating the gross proceeds from the issuance of the 2022 Notes between the liability component and the embedded conversion option, or equity component. This allocation was done by first estimating an interest rate at the time of issuance for similar notes that do not include the embedded conversion option. This interest rate, estimated at 7.4% , was used to compute the initial fair value of the liability component of $131.3 million . The excess of the gross proceeds received from the issuance of the 2022 Notes over the initial amount allocated to the liability component of $70.0 million was allocated to the embedded conversion option, or equity component. This excess is reported as a debt discount and will be subsequently amortized as interest expense, using the interest method, through September 2022, the maturity date of the 2022 Notes. Offering costs, consisting of the initial purchasers’ discount and offering expenses payable by the Company, were $6.4 million . These offering costs were allocated to the liability component and the equity component based on the relative valuations of such components. As a result, $4.2 million of the offering costs were classified as debt issuance costs and recorded on the balance sheet as a deduction from the carrying amount of the 2022 Notes liability. The remaining $2.2 million of offering costs were allocated to the equity component. The fair value of the 2022 Notes as of December 31, 2015 was $221.1 million . The carrying amount of the equity component of the 2022 Notes was $67.6 million at December 31, 2015 . The unamortized offering costs classified as debt issuance costs and recorded as a direct deduction to the carrying amount of the debt liability at December 31, 2015 were $4.0 million , which are being amortized as interest expense through the September 2022 maturity date of the 2022 Notes. 2018 Convertible Senior Notes In June 2011, the Company issued $120.0 million aggregate principal amount of 1.50% convertible senior notes due in 2018 (the “2018 Notes”). The 2018 Notes are senior unsecured obligations of the Company, with interest payable semi-annually in cash at a rate of 1.50% per annum, and will mature on July 1, 2018 , unless earlier repurchased, redeemed or converted. The 2018 Notes may be converted by the holders at their option on any day prior to the close of business on the scheduled trading day immediately preceding April 1, 2018 only under the following circumstances: (a) during the five business-day period after any ten consecutive trading-day period (the “measurement period”) in which the trading price per Note for each day of that measurement period was less than 98% of the product of the last reported sale price of the common stock and the applicable conversion rate on each such day; (b) during any calendar quarter (and only during such quarter) after the calendar quarter ended September 30, 2011, if the last reported sale price of the common stock for 20 or more trading days in a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter exceeds 130% of the applicable conversion price in effect on the last trading day of the immediately preceding calendar quarter; (c) upon the occurrence of specified corporate events; or (d) if the Company calls the 2018 Notes for redemption. The 2018 Notes will be convertible, regardless of the foregoing circumstances, at any time from, and including, April 1, 2018 through the second scheduled trading day immediately preceding the maturity date. The initial conversion rate for the 2018 Notes is 23.8126 shares of the Company’s common stock per $1,000 principal amount of 2018 Notes, equivalent to a conversion price of approximately $41.99 per share of the common stock. The conversion price will be subject to adjustment in some events, but will not be adjusted for accrued interest. In addition, if a make-whole fundamental change, as defined in the indenture governing the 2018 Notes (the “2018 Indenture”), occurs prior to the maturity date, the Company will in some cases increase the conversion rate for a holder that elects to convert its 2018 Notes in connection with such make-whole fundamental change. Upon conversion, the Company will pay cash up to the aggregate principal amount of the 2018 Notes to be converted and deliver shares of the common stock in respect of the remainder, if any, of the conversion obligation in excess of the aggregate principal amount of the 2018 Notes being converted. While the 2018 Notes were not convertible as of December 31, 2015 , if the 2018 Notes were convertible, no shares would have been distributed upon conversion because the conversion price was above the stock price as of such date. Holders of the 2018 Notes may require the Company to repurchase some or all of the 2018 Notes for cash, subject to certain exceptions, upon a fundamental change, as defined in the 2018 Indenture, at a repurchase price equal to 100% of the principal amount of the 2018 Notes being repurchased, plus any accrued and unpaid interest up to but excluding the relevant repurchase date. The Company may not redeem the 2018 Notes prior to July 1, 2015. Beginning July 1, 2015, the Company may redeem for cash all or part of the 2018 Notes (except for the 2018 Notes that the Company is required to repurchase as described above) if the last reported sale price of the common stock exceeds 140% of the applicable conversion price for 20 or more trading days in a period of 30 consecutive trading days ending on the trading day immediately prior to the date of the redemption notice. The redemption price will equal the sum of 100% of the principal amount of the 2018 Notes to be redeemed, plus accrued and unpaid interest, plus a “make-whole premium” payment. The Company must make the make-whole premium payments on all 2018 Notes called for redemption prior to the maturity date, including 2018 Notes converted after the date the Company delivered the notice of redemption. The Company has separately accounted for the liability and equity components of the convertible debt instrument by allocating the gross proceeds from the issuance of the 2018 Notes between the liability component and the embedded conversion option, or equity component. This allocation was done by first estimating an interest rate at the time of issuance for similar notes that do not include the embedded conversion option. This interest rate, estimated at 8% , was used to compute the initial fair value of the liability component of $79.4 million . The excess of the gross proceeds received from the issuance of the 2018 Notes over the initial amount allocated to the liability component of $40.6 million , was allocated to the embedded conversion option, or equity component. This excess is reported as a debt discount and subsequently amortized as interest expense, using the effective interest method, through July 2018, the maturity date of the 2018 Notes. Offering costs, consisting of the initial purchasers’ discount and offering expenses payable by the Company, were $4.3 million . These offering costs were allocated to the liability component and the equity component based on the relative valuations of such components. As a result, $2.9 million of the offering costs were classified as debt issuance costs and recorded on the balance sheet as a deduction from the carrying amount of the 2018 Notes liability. The remaining $1.4 million of offering costs were allocated to the equity component. Concurrently with the closing of the 2022 Notes offering, the Company repurchased $50.9 million principal amount of the 2018 Notes in privately negotiated transactions for an aggregate purchase price of $53.4 million . The Company recorded an extinguishment loss of $4.2 million on the repurchase, including $0.5 million associated with unamortized issuance costs. This loss was recorded in other expense within the consolidated statement of operations. The remaining purchase price was allocated between the liability component and the equity component based upon the fair value of the debt immediately prior to the repurchase at $42.4 million and $6.8 million , respectively. The fair value of the 2018 Notes as of December 31, 2015 and 2014 was $75.3 million and $125.1 million , respectively. The carrying amount of the equity component of the Notes was $9.5 million at December 31, 2015 . The unamortized offering costs at December 31, 2015 were $0.6 million which are being amortized as interest expense through the July 2018 maturity date of the Notes. The following table shows the amounts recorded within the Company’s financial statements with respect to the combined 2022 Notes and 2018 Notes (collectively, the "Notes") (in thousands): December 31, December 31, Convertible debt principal $ 270,355 $ 120,000 Unamortized debt discount (77,440 ) (22,951 ) Unamortized debt issuance costs (4,584 ) (1,421 ) Net carrying amount of convertible debt $ 188,331 $ 95,628 The following table presents the interest expense recognized related to the Notes (in thousands): Year ended December 31, 2015 2014 Contractual interest expense $ 2,039 $ 1,800 Amortization of debt issuance costs 1,022 406 Accretion of debt discount 7,547 5,500 Interest expense $ 10,608 $ 7,706 The net proceeds from the 2018 Note and 2022 Note offerings were approximately $115.7 million and $194.8 million , respectively, after deducting discounts to the initial purchasers and offering expenses payable by the Company. Fair Value of Borrowings Fair value for the Company’s borrowings is estimated using quoted market price of the Notes at December 31, 2015 and 2014 , quoted market prices for similar instruments and by observable market data. The Company believes its creditworthiness and the financial market in which it operates has not materially changed since entering into the arrangements. If measured at fair value in the financial statements, long-term debt (including the current portion) would be classified as Level 2 in the fair value hierarchy. The aggregate maturities of borrowings as of December 31, 2015 were as follows (in thousands): 2016 - 2017 $ — 2018 69,105 2019 and thereafter 201,250 $ 270,355 Installment Bank Loans In connection with the acquisition of Movial Applications Oy in October 2011, the Company assumed five installment loans with Tekes, the Finnish Funding Agency for Technology and Innovation, which loans were repaid in full by the Company during 2013. The loans were governed by the Finnish Act on State Lending and State Guarantees, Government Decree on Research, Development and Innovation Funding and were used to fund approved research and development projects. The repayment terms were determined on a per project basis and the interest rate on each loan was variable, with the interest rate equal to three percent at the time of repayment.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity Preferred Stock Pursuant to the Company’s amended and restated certificate of incorporation filed on June 21, 2010, the Company is authorized to issue 5,000,000 shares of preferred stock. The board of directors has the authority, without action by its stockholders, to designate and issue shares of preferred stock in one or more series and to fix the rights, preferences, privileges and restrictions thereof. These rights, preferences and privileges could include dividend rights, conversion rights, voting rights, terms of redemption, liquidation preferences, sinking fund terms and the number of shares constituting any series or the designation of such series, any or all of which may be greater than the rights of common stock. The issuance of the Company’s preferred stock could adversely affect the voting power of holders of common stock and the likelihood that such holders will receive dividend payments and payments upon liquidation and could have the effect of delaying, preventing or deterring a change in control. To date, the board of directors has not designated any rights, preference or powers of any preferred stock and no shares of preferred stock have been issued.

Stock-based Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation	Stock-based Compensation Equity Incentive Plans In 1999, the Company adopted the 1999 Stock Incentive Plan (the “1999 Plan”). The 1999 Plan provided for the grant of incentive stock options, nonqualified stock options, restricted stock awards and stock appreciation rights. The 1999 Plan terminated in June 2009 whereby no new options or awards are permitted to be granted. In April 2009, the Company adopted the 2009 Equity Incentive Plan. This plan provides for the grant of incentive stock options, nonqualified stock options, restricted stock awards, RSUs and stock appreciation rights. In June 2010, the 2009 Equity Incentive Plan was amended and restated to provide for, among other things, annual increases in the share reserve (as amended and restated, the “2009 Plan”). The term of stock-based grants is up to ten years , except that certain stock-based grants made after 2005 have a term of five years . For grants made under the 2009 Plan prior to January 1, 2015, the requisite vesting period is typically four years and for grants made subsequent to January 1, 2015, the requisite vesting period is typically three years . On each of January 1, 2014 and 2015, 1,250,000 shares were added to the 2009 Plan. At December 31, 2015 , the Company had 917,388 shares of common stock available for issuance under the 2009 Plan. Stock-based compensation expense recognized by the Company is as follows (in thousands): Year ended December 31, 2015 2014 2013 Stock options $ 7,572 $ 6,814 $ 5,963 Restricted stock units 31,719 19,585 16,449 Performance stock units 1,153 3,874 5,020 Total recognized stock-based compensation expense $ 40,444 $ 30,273 $ 27,432 Stock Options The following table presents a summary related to stock options for the following periods: Number of Options Outstanding Weighted Average Exercise Price Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value (in thousands) Balance, December 31, 2014 1,678,996 $ 26.73 Granted 782,050 32.22 Exercised (310,419 ) 19.94 Forfeited (106,513 ) 31.15 Expired (44,239 ) 36.41 Balance, December 31, 2015 1,999,875 $ 29.48 7.41 $ 13,744 Vested and exercisable at December 31, 2015 1,019,299 $ 28.13 6.13 $ 9,172 In 2015 , 2014 and 2013 , the Company granted stock options with a weighted-average grant date fair value of $15.75 , $12.91 and $18.09 , respectively. The intrinsic value of stock options exercised in 2015 , 2014 and 2013 was $5.2 million , $1.6 million and $5.0 million , respectively, and cash received from stock options exercised was $6.2 million , $0.7 million and $1.3 million , respectively. At December 31, 2015 , unrecognized stock-based compensation expense, net of estimated forfeitures, relating to unvested stock options was $14.0 million which amount is scheduled to be recognized as stock-based compensation expense over a weighted average period of 2.2 years . To the extent the actual forfeiture rate is different than what the Company has anticipated at December 31, 2015 , stock-based compensation expense will be different from expectations. Restricted Stock Units The following table presents a summary of activity for RSUs (excluding RSUs that are subject to performance-based vesting conditions (“PSUs”)): Number of RSUs Weighted Average Grant Date Fair Value Balance, December 31, 2014 1,029,787 $ 32.09 Granted 1,466,985 34.02 Vested (923,517 ) 33.36 Forfeited (61,233 ) 33.31 Balance, December 31, 2015 1,512,022 $ 33.14 The RSUs generally vest over three or four years from the vesting commencement date and on vesting the holder receives one share of common stock for each RSU. At December 31, 2015 , unrecognized stock-based compensation expense related to unvested RSUs was $42.1 million , which is scheduled to be recognized over a weighted average period of 1.83 years. To the extent the actual forfeiture rate is different than what the Company has anticipated at December 31, 2015 , stock-based compensation expense will be different from expectations. Performance Stock Units The following table presents a summary of activity for PSUs: Number of PSUs Weighted Average Grant Date Fair Value Balance, December 31, 2014 557,588 $ 26.88 Granted — — Vested — — Forfeited (7,500 ) 27.19 Balance, December 31, 2015 550,088 $ 26.87 The PSUs generally vest over three or four years from the vesting commencement date, subject to the satisfaction of certain performance conditions, and on vesting the holder receives one share of common stock for each PSU. During 2014, the Company granted an aggregate of 205,088 PSUs to certain employees hired in connection with an acquisition. These PSUs vest over a period of three years , subject to the satisfaction of certain financial performance conditions related to the business acquired by the Company. At December 31, 2015 , unrecognized stock-based compensation expense related to unvested PSUs was $0.8 million , which is scheduled to be recognized over a weighted average period of 0.93 years . To the extent the actual forfeiture rate is different than what the Company has anticipated at December 31, 2015 , stock-based compensation expense will be different from expectations. Tax Benefits Upon adoption of the FASB’s guidance on stock-based compensation, the Company elected the alternative transition method (short cut method) provided for calculating the tax effects of stock-based compensation. The alternative transition method includes simplified methods to establish the beginning balance of the additional paid-in capital pool (“APIC pool”) related to the tax effects of employee stock-based compensation, and to determine the subsequent impact on the APIC pool and consolidated statements of cash flows related to the tax effect of employee stock-based compensation awards that are outstanding upon adoption. As of December 31, 2015 , the Company’s APIC pool balance was $10.7 million . The Company applies a with-and-without approach in determining its intra-period allocation of tax expense or benefit attributable to stock-based compensation deductions. Tax deductions in excess of previously recorded benefits (windfalls) included in net operating loss carryforwards but not reflected in deferred tax assets for the years ended December 31, 2015 and 2014 are $50.4 million and $49.9 million , respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Leases The Company leases office space under non-cancelable operating leases with various expiration dates through 2024. Rent expense was approximately $4.7 million , $3.6 million and $3.2 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. The following table presents future minimum lease payments under the non-cancelable operating leases (in thousands): Operating Leases Years Ending December 31: 2016 $ 4,743 2017 4,599 2018 4,159 2019 2,558 2020 and thereafter 5,782 Total future minimum lease payments $ 21,841 Indemnifications and Contingencies In the normal course of business, the Company enters into contracts and agreements that may contain representations and warranties and provide for general indemnifications. The Company’s exposure under these agreements is unknown because it involves claims that may be made in the future, but have not yet been made. The Company has not paid any claims related to indemnification obligations to date. In accordance with its bylaws and certain agreements, the Company has indemnification obligations to its officers and directors for certain events or occurrences, subject to certain limits, while they are serving at the Company’s request in such capacity. There have been no claims to date under these indemnification obligations. In addition, the Company is involved in litigation incidental to the conduct of its business. The Company is not a party to any lawsuit or proceeding that, in the opinion of management, is reasonably possible to have a material adverse effect on its financial position, results of operations or cash flows.

Segment and Geographic Informat

Segment and Geographic Information	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Segment and Geographic Information	Segment and Geographic Information Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, in deciding how to allocate resources and in assessing performance. The Company’s chief operating decision maker is its Chief Executive Officer (“CEO”). The CEO reviews financial information presented on a consolidated basis, along with information about revenue by geographic region for purposes of allocating resources and evaluating financial performance. Discrete information on a geographic basis, except for revenue, is not provided below the consolidated level to the CEO. The Company has concluded that it operates in one segment and has provided the required enterprise-wide disclosures. Revenue by geographic area is based on the location of the end-user carrier. The following table presents revenue and long-lived assets, net, by geographic area (in thousands): Year Ended December 31, 2015 2014 2013 Revenues: United States $ 172,027 $ 106,008 $ 100,857 EMEA 61,114 54,950 44,235 APAC 26,156 41,188 20,990 Other 19,546 14,711 12,411 Total revenue $ 278,843 $ 216,857 $ 178,493 December 31, December 31, Long-Lived Assets, net United States $ 20,862 $ 19,049 EMEA 5,008 2,206 APAC 1,172 379 Other 272 397 Total long-lived assets, net $ 27,314 $ 22,031

401(k) Defined Contribution Pla

401(k) Defined Contribution Plan	12 Months Ended
	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
401(k) Defined Contribution Plan	401(k) Defined Contribution Plan The Company maintains a tax-qualified 401(k) retirement plan that provides eligible U.S. employees with an opportunity to save for retirement on a tax advantaged basis. The Company has a 401(k) plan covering all eligible employees. Beginning January 1, 2012, the Company matches a portion of the employees’ eligible contributions according to the 401(k) plan document. Matching contributions to the plan during the years ended December 31, 2015 , 2014 and 2013 were $3.0 million , $2.0 million and $1.8 million , respectively.

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	Quarterly Financial Data (Unaudited) (in thousands, except per share data): March 31, June 30, September 30, December 31, Total revenue $ 55,671 $ 64,484 $ 69,097 $ 89,591 Gross profit 39,661 44,249 47,451 69,724 Income (loss) from operations (1,275 ) (4,928 ) 822 20,624 Net income (loss) (2,905 ) (5,288 ) (3,250 ) 11,622 Net income (loss) per share: Basic $ (0.10 ) $ (0.18 ) $ (0.11 ) $ 0.40 Diluted $ (0.10 ) $ (0.18 ) $ (0.11 ) $ 0.39 March 31, June 30, September 30, December 31, Total revenue $ 43,918 $ 52,484 $ 54,629 $ 65,826 Gross profit 31,101 37,607 39,420 51,035 Income (loss) from operations (7,129 ) 564 1,879 11,260 Net income (loss) (6,139 ) 1,506 (2,758 ) 7,687 Net income (loss) per share: Basic $ (0.22 ) $ 0.05 $ (0.10 ) $ 0.27 Diluted $ (0.22 ) $ 0.05 $ (0.10 ) $ 0.26

Subsequent Event

Subsequent Event	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event In February 2016, the Company completed its acquisition of all of the stock of Transera Communications, Inc. ("Transera"), a provider of cloud-based contact center software. The acquisition enables the Company to enhance its call center capabilities. The total consideration paid for Transera was $19.8 million . The Company is in the process of gathering information to prepare the purchase price allocation and accordingly has not presented here.

Schedule II - Consolidated Valu

Schedule II - Consolidated Valuation Allowance and Qualifying Accounts	12 Months Ended
	Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]
Schedule II - Consolidated Valuation Allowance and Qualifying Accounts	SCHEDULE II—CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS (In thousands) Balance at Beginning of Year Amounts Charged to Operations (1) Deductions (2) Additions Acquired from Business Combinations Balance at End of Year Allowance for doubtful accounts: Year Ended December 31, 2013 139 149 (160 ) — 128 Year Ended December 31, 2014 128 274 (116 ) — 286 Year Ended December 31, 2015 286 4 (205 ) — 85 Allowance for deferred tax assets: Year Ended December 31, 2013 5,558 — (2,261 ) — 3,297 Year Ended December 31, 2014 3,297 (3,033 ) — — 264 Year Ended December 31, 2015 264 5 — 43 312 _______________________ (1) Amount represents charges to bad debt and increase to or (release of) our valuation allowance. (2) Amount represents recoveries of accounts receivable previously charged to the allowance and utilization of net operating losses against the valuation allowance.

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements include the accounts and results of operations of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in the accompanying consolidated financial statements.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with United States generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual amounts could differ from these estimates.
Cash Equivalents and Restricted Cash	Cash Equivalents and Restricted Cash The Company considers all highly liquid instruments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents are held in money market accounts. Restricted cash consists primarily of certificates of deposit that are securing letters of credit related to operating leases for office space.
Investments in Marketable Securities	Investments in Marketable Securities Marketable debt securities that the Company does not intend to hold to maturity are classified as available-for-sale, are carried at fair value and are included on the Company’s consolidated balance sheet as either short-term or long-term investments depending on their maturity. Investments with original maturities greater than three months that mature less than one year from the consolidated balance sheet date are classified as short-term investments. Investments with maturities greater than one year from the consolidated balance sheet date are classified as long-term investments. Available-for-sale investments are marked-to-market at the end of each reporting period, with unrealized holding gains or losses, which represent temporary changes in the fair value of the investment, reflected in accumulated other comprehensive income (loss), a separate component of stockholders’ equity. The Company’s primary objective when investing excess cash is preservation of principal.
Fair Value Measurements	Fair Value Measurements The carrying amounts of the Company’s other financial instruments, accounts receivable, accounts payable and accrued expenses, approximate their respective fair values due to their short term nature. (See Note 9 Borrowings for additional information on fair value of debt.) The Company uses a three-tier fair value measurement hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis, as well as assets and liabilities measured at fair value on a non-recurring basis, in periods subsequent to their initial measurement. The three tiers are defined as follows: • Level 1 . Observable inputs based on unadjusted quoted prices in active markets for identical instruments and include the Company’s investments in money market funds and certificates of deposit; • Level 2 . Inputs valued using quoted market prices for similar instruments, nonbinding market prices that are corroborated by observable market data and include the Company’s investments and marketable securities in U.S. agency notes, commercial paper and corporate bonds; and • Level 3 . Unobservable inputs for which there is little or no market data, which require the Company to develop its own assumptions. Assets Measured at Fair Value on a Recurring Basis The Company evaluates its financial assets subject to fair value measurements on a recurring basis to determine the appropriate level of classification for each reporting period. This determination requires significant judgments to be made. There were no transfers between classification levels during the periods. Assets Measured at Fair Value on a Nonrecurring Basis The Company measures certain assets, including property and equipment, goodwill and intangible assets, at fair value on a nonrecurring basis. These assets are recognized at fair value when they are deemed to be impaired.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities and accounts receivable. All of the Company’s cash and cash equivalents and marketable securities are held at financial institutions that management believes to be of high credit quality. The Company’s cash and cash equivalent accounts may exceed federally insured limits at times. The Company has not experienced any losses on cash and cash equivalents to date. To manage accounts receivable risk, the Company evaluates the creditworthiness of its customers and maintains an allowance for doubtful accounts.
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable are derived from sales to customers. Each customer is evaluated for creditworthiness through a credit review process at the time of each order. Accounts receivable are stated at realizable value, net of an allowance for doubtful accounts that is maintained for estimated losses that would result from the inability of some customers to make payments as they become due. The allowance is based on an analysis of past due amounts and ongoing credit evaluations. Collection experience has been consistent with the Company’s estimates.
Property and Equipment	Property and Equipment Property and equipment are stated at cost, less accumulated depreciation and amortization. Replacements and major improvements are capitalized; maintenance and repairs are charged to expense as incurred. Depreciation is calculated using the straight-line method over the estimated useful lives of the related assets per the table below: Equipment 3 years Software 1.5 - 3 years Furniture and fixtures 5 years Leasehold improvements are amortized over the shorter of the term of the lease and the estimated useful life of the assets.
Business Combinations	Business Combinations In a business combination, the Company allocates the purchase price to the acquired business’ identifiable assets and liabilities at their acquisition date fair values. The excess of the purchase price over the amount allocated to the identifiable assets and liabilities, if any, is recorded as goodwill. The excess, if any, of the fair value of the identifiable assets acquired and liabilities assumed over the consideration transferred is recognized as a gain within other income in the consolidated statement of operations as of the acquisition date. To date, the assets acquired and liabilities assumed in the Company’s business combinations have primarily consisted of acquired working capital, definite-lived intangible assets and goodwill. The carrying value of acquired working capital approximates its fair value, given the short-term nature of these assets and liabilities. The Company estimates the fair value of definite-lived intangible assets acquired using a discounted cash flow approach, which includes an analysis of the future cash flows expected to be generated by such assets and the risk associated with achieving such cash flows. The key assumptions used in the discounted cash flow model include the discount rate that is applied to the discretely forecasted future cash flows to calculate the present value of those cash flows and the estimate of future cash flows attributable to the acquired intangible, which include revenue, operating expenses and taxes. The Company's estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the fair value of assets acquired and liabilities assumed, with the corresponding offset to goodwill.
Goodwill	Goodwill Goodwill represents the excess of (a) the aggregate of the fair value of consideration transferred in a business combination, over (b) the fair value of assets acquired, net of liabilities assumed. Goodwill is not amortized, but is subject to annual impairment tests as described below. The Company tests goodwill for impairment annually on December 31, or more frequently if events or changes in business circumstances indicate the asset might be impaired. The Company may first assess qualitative factors to determine if it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test included in U.S. GAAP. To the extent the assessment identifies adverse conditions, or if the Company elects to bypass the qualitative assessment, goodwill is tested for impairment at the reporting unit level using a two-step approach. The first step is to compare the fair value of the reporting unit to the carrying value of the net assets assigned to the reporting unit. If the fair value of the reporting unit is greater than the carrying value of the net assets assigned to the reporting unit, the assigned goodwill is not considered impaired. If the fair value is less than the reporting unit’s carrying value, step two is performed to measure the amount of the impairment, if any. In the second step, the fair value of goodwill is determined by deducting the fair value of the reporting unit’s identifiable assets and liabilities from the fair value of the reporting unit as a whole, as if the reporting unit had just been acquired and the purchase price were being initially allocated. If the carrying value of goodwill exceeds the implied fair value, an impairment charge would be recorded to operating expenses in the consolidated statement of operations in the period the determination is made. The Company has determined that it has one reporting unit, BroadSoft, Inc., which is the consolidated entity. Based on the Company’s completion of the first step of the two-step goodwill impairment test, there was no indication of impairment as of December 31, 2015 , 2014 or 2013 . (See Note 4 Goodwill and Intangibles. )
Identifiable Intangible Assets	Identifiable Intangible Assets The Company acquired intangible assets in connection with certain of its business acquisitions. These assets were recorded at their estimated fair values at the acquisition date and are amortized over their respective estimated useful lives using a method of amortization that reflects the pattern in which the economic benefits of the intangible assets are used. Estimated useful lives are determined based on the Company’s historical use of similar assets and the expectation of future realization of revenue attributable to the intangible assets. In those cases where the Company determines that the useful life of an intangible asset should be shortened, the Company amortizes the net book value in excess of the estimated salvage value over its revised remaining useful life. The Company did not revise the useful life estimates attributed to any of the Company’s intangible assets during the years ended December 31, 2015 , 2014 or 2013 . (See Note 4 Goodwill and Intangibles .) The estimated useful lives used in computing amortization are as follows: Customer relationships 3 - 8 years Developed technology 2 - 6 years Tradenames 1 - 7 years
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company reviews long-lived assets, including property and equipment and definite-lived intangible assets, for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of the assets to future undiscounted net cash flows expected to be generated by the assets. Recoverability measurement and estimating of undiscounted cash flows for assets to be held and used is done at the lowest possible levels for which there are identifiable cash flows. If such assets are considered impaired, the amount of impairment recognized would be equal to the amount by which the carrying amount of the assets exceeds the fair value of the assets, which the Company would compute using a discounted cash flow approach. Assets to be disposed of are recorded at the lower of the carrying amount or fair value less costs to sell.
Deferred Financing Costs	Deferred Financing Costs The Company amortizes deferred financing costs using the effective-interest method and records such amortization as interest expense.
Revenue Recognition	Revenue Recognition The Company’s revenue is generated from the sales of software licenses and related maintenance for those licenses, subscription and usage fees related to the cloud offering and professional services. The Company’s software licenses, subscription and maintenance contracts and professional services are sold directly through its own sales force and indirectly through distribution partners.
License Software	License Software Revenue from software licenses is recognized when the following four basic criteria are met as follows: • Persuasive evidence of an arrangement. For direct sales, an agreement signed by the Company and by the customer, in conjunction with a non-cancelable purchase order or executed sales quote from the customer, is deemed to represent persuasive evidence of an arrangement. For sales through distribution partners, a purchase order or executed sales quote, in conjunction with a reseller agreement with the distribution partner and evidence of the distribution partner's customer, is deemed to represent persuasive evidence of an arrangement. Revenue is deferred for sales through a distribution partner without proof of the distribution partner's customer. • Delivery has occurred. Delivery is deemed to have occurred when the customer is given electronic access to the licensed software and a license key for the software has been delivered or made available. If an arrangement contains a requirement to deliver additional elements essential to the functionality of the delivered element, revenue associated with the arrangement is recognized when delivery of the final element has occurred. • Fees are fixed or determinable. The Company considers the fee to be fixed or determinable unless the fee is subject to refund or adjustment or is not payable within normal payment terms. If the fee is subject to refund or adjustment, revenue is recognized when the refund or adjustment right lapses. If payment terms exceed the Company’s normal terms, revenue is recognized as the amounts become due and payable or upon the receipt of cash if collection is not probable. • Collection is probable. Each customer is evaluated for creditworthiness through a credit review process at the inception of an arrangement. Collection is deemed probable if, based upon the Company’s evaluation, the Company expects that the customer will be able to pay amounts under the arrangement as payments become due. If it is determined that collection is not probable, revenue is deferred and recognized upon cash collection. The warranty period for the Company’s licensed software is generally 90 days . The Company delivers its licensed software primarily by utilizing electronic media. Revenue includes amounts billed for shipping and handling and such amounts represent an immaterial amount of revenue. Cost of license software revenue includes shipping and handling costs.
Subscription and Maintenance Support	Subscription and Maintenance Support The Company typically sells annual maintenance support contracts in combination with license software sales. Maintenance support enables the customer to continue receiving software maintenance and support after the warranty period has expired. Maintenance support is renewable at the option of the customer. When customers prepay for annual maintenance support, the related revenue is deferred and recognized ratably over the term of the maintenance period. Generally, rates for maintenance support, including subsequent renewal rates, are established based upon a specific percentage of net license fees as set forth in the arrangement. Maintenance support typically includes the right to unspecified product upgrades on an if-and-when available basis. The Company’s subscription revenue is generated from a recurring fee and/or a usage based fee from customers purchasing the Company's cloud offering. Under these arrangements, the Company is generally paid a recurring fee calculated based on the number of seats and type of service purchased or a usage fee based on the actual number of transactions. Revenue related to the recurring fee is recognized ratably over the contract term beginning with the date our service is made available to the customer. The usage fee is recognized as revenue in the period in which the transactions occur. Subscription agreements do not provide customers with the right to take possession of the underlying software at any time.
Professional Services and Other	Professional Services and Other Revenue from professional services includes implementation, training and consulting fees. Professional services are generally either daily-rate or fixed-fee arrangements. Revenue from daily-rate arrangements is typically recognized as services are performed. Revenue related to fixed-fee arrangements are typically recognized upon completion of all of the deliverables. Services are generally not considered essential to the functionality of the licensed software. Costs related to shipping and handling and billable travel expenses are included in cost of revenue.
Multiple Element Arrangements	Multiple Element Arrangements The Company accounts for multiple element arrangements that consist of software and software-related services, collectively referred to as “software elements,” in accordance with industry specific accounting guidance for software and software-related transactions. For such transactions, the Company generally allocates revenue to the software license by determining the fair value of the undelivered elements, which is usually maintenance support and professional services. The Company establishes vendor-specific objective evidence ("VSOE") of the fair value of the maintenance support based on the renewal price as stated in the agreement and as charged in the first optional renewal period under the arrangement. VSOE for professional services is determined based on an analysis of our historical daily rates when these professional services are sold separately from the software license. For the Company's cloud offering with multiple element arrangements that include subscription and professional services, the Company allocates revenue to all deliverables based on their relative selling prices. In such circumstances, the Company uses the following hierarchy to determine the selling price to be used for allocating revenue to deliverables (a) vendor-specific objective evidence of fair value, (b) third-party evidence of selling price and (c) best estimate of the selling price. Best estimate of selling price reflects the Company’s estimates of what the selling prices of elements would be if they were sold on a stand-alone basis. Factors considered by the Company in developing relative selling prices for products and services include the discounting practices, price lists, go-to-market strategy, historical standalone sales and contract prices.
Research and Development	Research and Development Research and development expenses consist primarily of personnel and related expenses for the Company's research and development staff, including salaries, benefits, bonuses and stock-based compensation and the cost of certain third-party contractors. Research and development costs, other than software development expenses qualifying for capitalization, are expensed as incurred.
Software Development Costs and Internal-Use Software Development Costs	Software Development Costs Software development costs for software to be sold, leased or marketed that is incurred prior to the establishment of technological feasibility are expensed as incurred as research and development expense. Software development costs incurred subsequent to the establishment of technological feasibility, if any, are capitalized until the software is available for general release to customers. The Company has determined that technological feasibility has been established at approximately the same time as the general release of such software to customers. Therefore, to date, the Company has not capitalized any related software development costs. Internal-Use Software Development Costs The Company capitalizes costs associated with customized internal-use software systems that have reached the application development stage. Such capitalized costs include costs directly associated with the development of the applications. Capitalization of such costs begins when the preliminary project stage is complete and ceases at the point the project is substantially complete and is ready for its intended purpose. Internal-use software is amortized on a straight-line basis over the estimated useful life. Costs incurred during the preliminary development stage, as well as maintenance and training costs, are expensed as incurred.
Deferred Revenue	Deferred Revenue Deferred revenue represents amounts billed to or collected from customers for which the related revenue has not been recognized because one or more of the revenue recognition criteria have not been met. The current portion of deferred revenue is expected to be recognized as revenue within 12 months from the balance sheet date.
Cost of Revenue	Cost of Revenue Cost of revenue includes (a) royalties and other fees paid to third parties whose technology or products are sold as part of the Company’s products, (b) direct costs to manufacture and distribute product, (c) direct costs to provide product support and professional support services, (d) direct costs associated with delivery of the Company's cloud offering and (e) amortization expense related to acquired intangible assets.
Income Taxes	Income Taxes The Company uses the liability method of accounting for income taxes as set forth in the authoritative guidance for accounting for income taxes. This method requires an asset and liability approach for the recognition of deferred tax assets and liabilities for the expected future tax consequences attributable to temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and their respective tax bases, and for operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured by applying enacted statutory tax rates applicable to the future years in which deferred amounts are expected to be settled or realized. The Company currently has significant deferred tax assets, primarily resulting from net operating loss carryforwards, deferred revenue and stock-based compensation expense. The Company has a valuation allowance of approximately $0.3 million against its net deferred tax assets. Management weighs the positive and negative evidence to determine if it is more likely than not that some or all of the deferred tax assets will be realized. The Company accounts for uncertainty in income taxes using a two-step approach to recognize and measure tax benefits when the realization of the benefits is uncertain. The first step is to determine whether the benefit is to be recognized; the second step is to determine the amount to be recognized. Income tax benefits should be recognized when, based on the technical merits of a tax position, the entity believes that if a dispute arose with the taxing authority and were taken to a court of last resort, it is more likely than not (i.e., a probability of greater than 50 percent) that the tax position would be sustained as filed. If a position is determined to be more likely than not of being sustained, the reporting enterprise should recognize the largest amount of tax benefit that is greater than 50 percent likely of being realized upon ultimate settlement with the taxing authority. The Company’s practice is to recognize interest and penalties related to income tax matters in income tax expense.
Stock-Based Compensation	Stock-Based Compensation The Company applies the fair value method for determining the cost of stock-based compensation for employees, directors and consultants. Under this method, the total cost of a stock option grant is measured based on the estimated fair value of the stock option award at the date of the grant, using a binomial options pricing model, or binomial lattice model. The fair value of a restricted stock unit ("RSU") is based on the market value of the Company’s common stock on the date of grant. The fair value of a performance stock unit ("PSU") is based on the market price of the Company’s stock on the date of grant and assumes that the performance criteria will be met and the target payout level will be achieved. Compensation cost is adjusted for subsequent changes in the outcome of performance-related conditions until the award vests. The fair value of a performance stock unit with a market condition is estimated on the date of award, using a Monte Carlo simulation model to estimate the total return ranking of the Company’s stock in relation to the target index of companies over each performance period. Compensation cost on performance shares with a market condition is not adjusted for subsequent changes regardless of the level of ultimate vesting. For service only awards, the total cost related to the portion of awards granted that is ultimately expected to vest is recognized as stock-based compensation expense on a straight-line basis over the requisite service period of the grant. For performance based awards, the total cost related to the portion of the awards granted that is ultimately expected to vest is recognized as stock-based compensation expense on a graded basis over the requisite service period of the grant. Estimated Fair Value of Share-Based Payments The binomial lattice model considers certain characteristics of fair value option pricing that are not considered under the Black-Scholes model. Stock-based awards are combined into one grouping for purposes of valuation assumptions. Fair value of the stock options was estimated at the grant date, using the following weighted average assumptions: Year ended December 31, 2015 2014 2013 Average assumptions: Risk-free interest rate 1.5 % 1.7 % 1.5 % Expected dividend yield — % — % — % Expected volatility 52 % 53 % 56 % Expected term (years) 6.9 years 7.6 years 7.5 years The Company has assumed no dividend yield because dividends are not expected to be paid in the near future, which is consistent with the Company’s history of not paying dividends. The risk-free interest rate assumption is based upon observed interest rates for constant maturity U.S. Treasury securities appropriate for the term of the Company’s employee stock options. The expected life of an option is derived from the binomial lattice model, and is based on several factors, including the contract life, exercise factor, post-vesting termination rate and volatility. The expected exercise factor, which is the ratio of the fair value of common stock on the expected exercise date to the exercise price, and expected post-vesting termination rate, which is the expected rate at which employees are likely to terminate after vesting occurs, are based on an analysis of actual historical and expected behavior by option holders and analysis of comparable public companies. Expected volatility is based on the historical volatility of the Company and comparable public companies. The Company’s estimate of pre-vesting forfeitures, or forfeiture rate, is based on an analysis of historical behavior by option holders. The estimated forfeiture rate is applied to the total estimated fair value of the awards, as derived from the binomial lattice model, to compute the stock-based compensation expense, net of pre-vesting forfeitures, to be recognized in the consolidated statements of operations.
Net Income Per Common Share	Net Income Per Common Share Basic net income per common share is computed based on the weighted average number of outstanding shares of common stock. Diluted income per common share adjusts the basic weighted average common shares outstanding for the potential dilution that could occur if stock options, RSUs and convertible securities were exercised or converted into common stock. Due to the cash settlement feature of the principal amount of the convertible senior notes, the Company only includes the impact of the premium feature in the diluted earnings per common share calculation when the average stock price exceeds the conversion price of the Notes, which did not occur during the years ended December 31, 2015 , 2014 or 2013 .
Foreign Currency	Foreign Currency The functional currency of operations located outside the United States is the respective local currency. The financial statements of each operation are translated into U.S. dollars using period-end exchange rates for assets and liabilities and average exchange rates during the period for revenue and expenses. Translation effects are included in accumulated other comprehensive income.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers: Topic 606 ("ASU 2014-09"), which supersede nearly all existing revenue recognition guidance under U.S. GAAP. The standard's core principle is to recognize revenue when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. The standard defines a five step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than are required under existing U.S. GAAP, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The standard allows entities to apply either of two adoption methods: (a) retrospective application to each prior reporting period presented with the option to elect certain practical expedients as defined within ASU 2014-09; or (b) retrospective application with the cumulative effect of initially applying the standard recognized at the date of initial application and providing certain additional disclosures as defined per ASU 2014-09. In August 2015, the FASB issued Accounting Standards Update 2015-14, Revenue from Contracts with Customers: Topic 606 ("ASU 2015-14"), which defers the effective date for ASU 2014-09 to annual reporting periods beginning after December 15, 2017, including interim reporting periods within that reporting period. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The Company is evaluating the impact of adopting this new standard on its financial statements and the method of adoption. In April 2015, the FASB issued Accounting Standards Update 2015-03, Interest-Imputation of Interest ("ASU 2015-03"), which provides updated guidance for accounting for debt issuance costs. The update is intended to simplify and standardize the presentation of debt issuance costs. ASU 2015-03 requires that the Company present debt issuance costs in the balance sheet as a direct deduction from the carrying amount of the debt liability, consistent with the treatment of debt discounts. The Company adopted the new guidance effective July 1, 2015 and reclassified its unamortized debt issuance costs from "other current assets" and "other long-term assets" to "convertible senior notes" on the consolidated balance sheets for all periods presented. The balances of unamortized debt issuance costs reclassified as of December 31, 2014 were $0.4 million and $1.0 million from other current assets and other long-term assets, respectively. In September 2015, the FASB issued Accounting Standards Update 2015-16, Business Combinations: Topic 805 ("ASU 2015-16"), which provides updated guidance on recognizing adjustments to provisional amounts for items in a business combination. ASU 2015-16 requires that the Company recognize adjustments to provisional amounts during the reporting period in which the adjustment amounts are determined. The Company will adopt ASU 2015-16 upon its effective date, which is for annual reporting periods beginning after December 15, 2015, including interim reporting periods within that reporting period. The guidance will be applied prospectively. In November 2015, the FASB issued Accounting Standards Update 2015-17, Income Taxes: Topic 740 ("ASU 2015-17"), which provides updated guidance for the presentation of deferred income taxes. ASU 2015-17 requires that the Company present deferred income taxes as non-current in the balance sheet. The Company adopted the new guidance effective December 31, 2015 and reclassified its current deferred tax assets and deferred tax liabilities to non-current on the consolidated balance sheet for all periods presented. The balances of current deferred tax assets and current deferred tax liabilities reclassified to non-current as of December 31, 2014 were $14.3 million and an immaterial amount, respectively.

Summary of Significant Accoun26

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Long-Term Investments	The following table summarizes the Company's investments: December 31, 2015 December 31, 2014 Contracted Maturity Carrying Value Contracted Maturity Carrying Value (in thousands) (in thousands) Money market funds demand $ 123,170 demand $ 56,847 Total cash equivalents 123,170 56,847 U.S. agency notes 50 - 365 days 39,467 77 - 240 days 14,078 Corporate bonds 12 - 319 days 33,064 42 - 357 days 54,845 Total short-term investments 72,531 68,923 U.S. agency notes 486 - 851 days 44,175 415 - 868 days 37,178 Corporate bonds 376 - 846 days 58,210 377 - 502 days 14,852 Total long-term investments $ 102,385 $ 52,030
Schedule of Unrealized Loss on Investments	The following table summarizes the Company's investments at December 31, 2015 (in thousands): Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. agency notes $ 83,977 $ — $ (334 ) $ 83,643 Corporate bonds 91,537 2 (266 ) 91,273 Total investments $ 175,514 $ 2 $ (600 ) $ 174,916 The following table summarizes the Company's investments at December 31, 2014 (in thousands): Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. agency notes $ 51,270 $ 13 $ (26 ) $ 51,257 Corporate bonds 69,786 4 (94 ) 69,696 Total investments $ 121,056 $ 17 $ (120 ) $ 120,953
Summary of Carrying and Fair Value of Company's Financial Assets	The following table summarizes the carrying and fair value of the Company’s financial assets (in thousands): December 31, 2015 December 31, 2014 Carrying Value Fair Value Carrying Value Fair Value Assets Cash equivalents and certificates of deposit * $ 123,170 $ 123,170 $ 56,864 $ 56,864 Short and long-term investments 174,916 174,916 120,953 120,953 Total assets $ 298,086 $ 298,086 $ 177,817 $ 177,817 * Excludes $52.7 million and $21.6 million of operating cash balances as of December 31, 2015 and 2014 , respectively.
Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table summarizes the values (in thousands): December 31, Level 1 Level 2 Level 3 Money market funds $ 123,170 $ 123,170 $ — $ — Total cash equivalents and certificates of deposit * 123,170 123,170 — — U.S. agency notes 83,643 — 83,643 — Corporate bonds 91,273 — 91,273 — Total investments 174,916 — 174,916 — Total cash equivalents, certificates of deposit and investments $ 298,086 $ 123,170 $ 174,916 $ — December 31, Level 1 Level 2 Level 3 Money market funds $ 56,847 $ 56,847 $ — $ — Certificates of deposit 17 17 — — Total cash equivalents and certificates of deposit * 56,864 56,864 — — U.S. agency notes 51,257 — 51,257 — Corporate bonds 69,696 — 69,696 — Total investments 120,953 — 120,953 — Total cash equivalents, certificates of deposit and investments $ 177,817 $ 56,864 $ 120,953 $ — * Excludes $52.7 million and $21.6 million of operating cash balances as of December 31, 2015 and 2014 , respectively.
Customers Represented Percentage of Revenue or Accounts Receivable	The following customer represented 10% or more of revenue for the periods presented: Year Ended December 31, 2015 2014 2013 Revenue Company A * 13 % * * Represented less than 10%
Estimated Useful Lives of Related Assets	Depreciation is calculated using the straight-line method over the estimated useful lives of the related assets per the table below: Equipment 3 years Software 1.5 - 3 years Furniture and fixtures 5 years
Estimated Useful Lives Used in Computing Amortization	The estimated useful lives used in computing amortization are as follows: Customer relationships 3 - 8 years Developed technology 2 - 6 years Tradenames 1 - 7 years
Deferred Revenue	Deferred revenue consists of the following (in thousands): December 31, December 31, License software $ 33,200 $ 26,495 Subscription and maintenance support 61,399 52,764 Professional services and other 16,455 22,197 Total $ 111,054 $ 101,456 Current portion $ 106,483 $ 87,423 Non-current portion 4,571 14,033 Total $ 111,054 $ 101,456
Fair Value of Stock Options Estimated at Weighted Average Assumptions	Fair value of the stock options was estimated at the grant date, using the following weighted average assumptions: Year ended December 31, 2015 2014 2013 Average assumptions: Risk-free interest rate 1.5 % 1.7 % 1.5 % Expected dividend yield — % — % — % Expected volatility 52 % 53 % 56 % Expected term (years) 6.9 years 7.6 years 7.5 years
Net (Loss) Income Per Common Share	The following table presents a reconciliation of the numerator and denominator of the basic and diluted earnings per share computation. In the table below, net income represents the numerator and weighted average common shares outstanding represents the denominator: Year Ended December 31, 2015 2014 2013 (in thousands, except per share data) Net income $ 179 $ 296 $ 375 Weighted average basic common shares outstanding 29,113 28,654 28,116 Dilutive effect of stock-based awards 705 711 595 Weighted average diluted common shares outstanding 29,818 29,365 28,711 Earnings per share: Basic $ 0.01 $ 0.01 $ 0.01 Diluted $ 0.01 $ 0.01 $ 0.01
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	The following tables present the effect of the change in accounting policy and its impact on key components of the Company’s consolidated financial statements (in thousands) : Year ended December 31, 2015 As Computed Under Graded Attribution Method As Reported Under Straight-line Attribution Method Effect of Change Revenue: License software $ 119,808 $ 119,808 $ — Subscription and maintenance support 112,836 112,836 — Professional services and other 46,199 46,199 — Total revenue 278,843 278,843 — Cost of revenue: License software 10,429 10,231 (198 ) Subscription and maintenance support 38,896 38,602 (294 ) Professional services and other 30,744 28,925 (1,819 ) Total cost of revenue 80,069 77,758 (2,311 ) Gross profit 198,774 201,085 2,311 Operating expenses: Sales and marketing 86,092 83,806 (2,286 ) Research and development 61,218 60,749 (469 ) General and administrative 41,207 41,287 80 Total operating expenses 188,517 185,842 (2,675 ) Income from operations 10,257 15,243 4,986 Other expense: Interest expense, net 9,386 9,386 — Other, net 5,714 5,714 — Total other expense, net 15,100 15,100 — Income (loss) before income taxes (4,843 ) 143 4,986 Benefit from income taxes (1,687 ) (36 ) 1,651 Net income $ (3,156 ) $ 179 $ 3,335 Net income per common share: Basic $ (0.11 ) $ 0.01 $ 0.12 Diluted $ (0.11 ) $ 0.01 $ 0.12 Weighted average common shares outstanding: Basic 29,113 29,113 Diluted 29,113 29,818 Stock-based compensation expense included above: Cost of revenue $ 9,538 $ 7,227 $ (2,311 ) Sales and marketing 16,107 13,821 (2,286 ) Research and development 12,313 11,844 (469 ) General and administrative 7,472 7,552 80 Year ended December 31, 2014 As Originally Reported As Adjusted Effect of Change Revenue: License software $ 103,311 $ 103,311 $ — Subscription and maintenance support 92,492 92,492 — Professional services and other 21,054 21,054 — Total revenue 216,857 216,857 — Cost of revenue: License software 9,667 9,755 88 Subscription and maintenance support 33,232 32,984 (248 ) Professional services and other 14,814 14,955 141 Total cost of revenue 57,713 57,694 (19 ) Gross profit 159,144 159,163 19 Operating expenses: Sales and marketing 69,681 69,471 (210 ) Research and development 49,515 50,125 610 General and administrative 32,729 32,993 264 Total operating expenses 151,925 152,589 664 Income from operations 7,219 6,574 (645 ) Other expense: Interest expense, net 7,177 7,177 — Other, net 1,300 1,300 — Total other expense, net 8,477 8,477 — Income (loss) before income taxes (1,258 ) (1,903 ) (645 ) Benefit from income taxes (2,270 ) (2,199 ) 71 Net income $ 1,012 $ 296 $ (716 ) Net income per common share: Basic $ 0.04 $ 0.01 $ (0.03 ) Diluted $ 0.03 $ 0.01 $ (0.02 ) Weighted average common shares outstanding: Basic 28,654 28,654 Diluted 29,917 29,365 Stock-based compensation expense included above: Cost of revenue $ 3,881 $ 3,862 $ (19 ) Sales and marketing 10,066 9,856 (210 ) Research and development 9,554 10,164 610 General and administrative 6,127 6,391 264 Year ended December 31, 2013 As Originally Reported As Adjusted Effect of Change Revenue: License software $ 94,408 $ 94,408 $ — Subscription and maintenance support 69,357 69,357 — Professional services and other 14,728 14,728 — Total revenue 178,493 178,493 — Cost of revenue: License software 9,241 8,867 (374 ) Subscription and maintenance support 21,368 20,359 (1,009 ) Professional services and other 10,771 10,415 (356 ) Total cost of revenue 41,380 39,641 (1,739 ) Gross profit 137,113 138,852 1,739 Operating expenses: Sales and marketing 62,174 56,822 (5,352 ) Research and development 49,696 45,271 (4,425 ) General and administrative 32,728 29,992 (2,736 ) Total operating expenses 144,598 132,085 (12,513 ) Income from operations (7,485 ) 6,767 14,252 Other expense: Interest expense, net 6,946 6,946 — Other, net (148 ) (148 ) — Total other expense, net 6,798 6,798 — Income (loss) before income taxes (14,283 ) (31 ) 14,252 Benefit from income taxes (5,409 ) (406 ) 5,003 Net income $ (8,874 ) $ 375 $ 9,249 Net income per common share: Basic $ (0.32 ) $ 0.01 $ 0.33 Diluted $ (0.32 ) $ 0.01 $ 0.33 Weighted average common shares outstanding: Basic 28,116 28,116 Diluted 28,116 28,711 Stock-based compensation expense included above: Cost of revenue $ 4,861 $ 3,122 $ (1,739 ) Sales and marketing 14,336 8,984 (5,352 ) Research and development 13,225 8,800 (4,425 ) General and administrative 9,262 6,526 (2,736 ) Year ended December 31, 2015 As Computed Under Graded Attribution Method As Reported Under Straight-line Attribution Method Effect of Change Deferred tax assets $ 11,035 $ 1,661 $ (9,374 ) Accounts payable and accrued expenses 29,498 28,667 (831 ) Stockholders’ equity: Common stock 291 291 — Additional paid-in capital 359,216 333,153 (26,063 ) Accumulated other comprehensive loss (13,810 ) (13,810 ) — Accumulated deficit (80,121 ) (62,601 ) 17,520 Total stockholders’ equity $ 265,576 $ 257,033 $ (8,543 ) Year ended December 31, 2014 As Originally Reported As Adjusted Effect of Change Deferred tax assets $ 24,797 $ 17,074 $ (7,723 ) Accounts payable and accrued expenses 21,222 20,787 (435 ) Stockholders’ equity: Common stock 290 290 — Additional paid-in capital 279,642 258,169 (21,473 ) Accumulated other comprehensive loss (7,712 ) (7,712 ) — Accumulated deficit (51,971 ) (37,786 ) 14,185 Total stockholders’ equity $ 220,249 $ 212,961 $ (7,288 ) As a result of the change in accounting policy, additional paid-in capital and accumulated deficit as of January 1, 2013 decreased from $208.1 million and $44.1 million , respectively, as originally reported using the graded attribution method, to $199.8 million and $38.1 million , respectively, using the straight-line method. Year ended December 31, 2015 As Computed Under Graded Attribution Method As Reported Under Straight-line Attribution Method Effect of Change Cash flows from operating activities: Net income (loss) $ (3,156 ) $ 179 $ 3,335 Adjustment to reconcile net income to net cash provided by operating activities: Depreciation and amortization 15,836 15,836 — Amortization of software licenses 2,848 2,848 — Stock-based compensation expense 45,430 40,444 (4,986 ) Provision for (recoveries of) doubtful accounts 4 4 — Provision for deferred income taxes (4,392 ) (2,741 ) 1,651 Tax windfall benefits from stock option exercises (1,809 ) (1,809 ) — Payment of original notes issuance discount (1,094 ) (1,094 ) — Non-cash interest expense on convertible senior notes 8,617 8,617 — Changes in operating assets and liabilities, net of acquisitions: Accounts receivable (23,935 ) (23,935 ) — Other current and long-term assets (4,896 ) (4,896 ) — Accounts payable, accrued expenses and other long-term liabilities 2,234 2,234 — Current and long-term deferred revenue 9,099 9,099 — Net cash provided by operating activities $ 44,786 $ 44,786 $ — Year ended December 31, 2014 As Originally Reported As Adjusted Effect of Change Cash flows from operating activities: Net income $ 1,012 $ 296 $ (716 ) Adjustment to reconcile net income to net cash provided by operating activities: Depreciation and amortization 12,391 12,391 — Amortization of software licenses 3,342 3,342 — Stock-based compensation expense 29,628 30,273 645 Provision for doubtful accounts 274 274 — Benefit from deferred income taxes (3,548 ) (3,477 ) 71 Excess tax benefit related to stock-based compensation (2,950 ) (2,950 ) — Non-cash interest expense on convertible senior notes 5,906 5,906 — Changes in operating assets and liabilities, net of acquisitions: Accounts receivable (14,806 ) (14,806 ) — Other current and long-term assets (4,056 ) (4,056 ) — Accounts payable, accrued expenses and other long-term liabilities 4,655 4,655 — Current and long-term deferred revenue 22,911 22,911 — Net cash provided by operating activities $ 54,759 $ 54,759 $ — Year ended December 31, 2013 As Originally Reported As Adjusted Effect of Change Cash flows from operating activities: Net income (loss) $ (8,874 ) $ 375 $ 9,249 Adjustment to reconcile net income (loss) to net cash provided by operating activities: Depreciation and amortization 7,822 7,822 — Amortization of software licenses 2,987 2,987 — Stock-based compensation expense 41,684 27,432 (14,252 ) Provision for doubtful accounts 149 149 — Provision for (benefit from) deferred income taxes (7,058 ) (2,055 ) 5,003 Excess tax benefit related to stock-based compensation (7,492 ) (7,492 ) — Non-cash interest expense on convertible senior notes 5,504 5,504 — Changes in operating assets and liabilities, net of acquisitions: Accounts receivable (16,334 ) (16,334 ) — Other current and long-term assets (1,128 ) (1,128 ) — Accounts payable, accrued expenses and other long-term liabilities (1,799 ) (1,799 ) — Current and long-term deferred revenue 16,473 16,473 — Net cash provided by operating activities $ 31,934 $ 31,934 $ —

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Estimated Fair Value of Assets Acquired and Liabilities Assumed	The following table summarizes the fair value of the assets acquired and liabilities assumed at the acquisition date of December 16, 2013 (in thousands): Accounts receivable $ 243 Prepaid expenses and other assets 7 Deferred tax asset 1,080 Property and equipment 64 Trade name 275 Customer relationships 2,610 Developed technology 1,236 Goodwill 5,686 Deferred tax liability (1,322 ) Accounts payable and accrued expenses (199 ) Total consideration $ 9,680 The following table summarizes the fair value of the assets acquired and liabilities assumed at the acquisition date of August 12, 2013 (in thousands): Cash and cash equivalents $ 215 Accounts receivable 1,187 Other current assets 289 Property and equipment 311 Trade name 310 Customer relationships 7,128 Developed technology 465 Goodwill 18,280 Deferred tax liability, net (966 ) Accounts payable and accrued expenses (876 ) Total consideration $ 26,343 The following table summarizes the fair value of the assets acquired and liabilities assumed at the acquisition date of June 3, 2015 (in thousands): Cash and cash equivalents $ 2,748 Accounts receivable 1,920 Prepaid and other assets 293 Deferred tax assets 2,404 Property and equipment 15 Customer relationships 5,600 Goodwill 2,497 Accounts payable and accrued expenses (677 ) Total consideration $ 14,800
Schedule of Pro Forma Information of Acquisitions	The pro forma information as presented below is for informational purposes only and is not necessarily indicative of the results of operations that would have been achieved if the acquisitions had been in effect for the periods presented. Year ended December 31, 2015 2014 2013 (In thousands except per share data) Revenue $ 284,292 $ 233,576 $ 184,383 Net income (loss) 1,852 (1,311 ) (98 ) Net income (loss) per common share, basic $ 0.06 $ (0.05 ) $ 0.00 Net income (loss) per common share, diluted $ 0.06 $ (0.05 ) $ 0.00

Goodwill and Intangibles (Table

Goodwill and Intangibles (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Changes in Carrying Amounts of Goodwill	The following table provides a summary of the changes in the carrying amounts of goodwill (in thousands): Balance, December 31, 2013 $ 65,192 Increase in goodwill related to acquisitions 2,974 Foreign currency translations (2,863 ) Balance, December 31, 2014 65,303 Increase in goodwill related to acquisitions 9,123 Foreign currency translations (2,151 ) Balance, December 31, 2015 $ 72,275
Schedule of Company's Acquired Intangible Assets Subject to Amortization	The Company’s acquired intangible assets are subject to amortization. The following is a summary of intangible assets (in thousands): December 31, 2015 December 31, 2014 Gross Carrying Amount Accumulated Amortization Net Amount Gross Carrying Amount Accumulated Amortization Net Amount Customer relationships $ 17,571 $ 3,721 $ 13,850 $ 14,532 $ 5,281 $ 9,251 Developed technology 13,277 8,489 4,788 13,072 7,031 6,041 Trade name 298 101 197 323 47 276 Total $ 31,146 $ 12,311 $ 18,835 $ 27,927 $ 12,359 $ 15,568
Schedule of Future Expected Amortization Expense on Intangible Assets	As of December 31, 2015 , future amortization expense on intangible assets is expected to be as follows (in thousands): 2016 $ 5,177 2017 4,098 2018 2,767 2019 2,389 2020 1,924 2021 and thereafter 2,480 Total amortization expense $ 18,835

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment at Cost	Property and equipment consists of the following (in thousands): December 31, 2015 2014 Equipment $ 26,767 $ 18,754 Software 11,460 7,580 Furniture and fixtures 1,645 1,213 Leasehold improvements 5,605 4,437 45,477 31,984 Less accumulated depreciation and amortization (25,996 ) (17,621 ) Property and equipment, net $ 19,481 $ 14,363

Accounts payable and other cu30

Accounts payable and other current liabilities (Tables)	12 Months Ended
	Dec. 31, 2015
Accounts Payable and Accrued Liabilities, Current [Abstract]
Schedule of Accounts Payable and Other Current Liabilities	Accounts payable and other current liabilities consist of the following (in thousands): December 31, 2015 2014 Accounts payable and accrued expenses $ 12,102 $ 8,038 Accrued compensation 11,670 9,428 Other 4,895 3,321 $ 28,667 $ 20,787

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Components of Income Before Income Taxes and Provision for (Benefit From) Income Taxes	The following table presents the components of the income before income taxes and the provision for (benefit from) income taxes (in thousands): Year ended December 31, 2015 2014 2013 Income (loss) before income taxes: United States $ (1,488 ) $ (4,769 ) $ (974 ) Foreign 1,631 2,866 943 Income (loss) before income taxes $ 143 $ (1,903 ) $ (31 ) Provision for (benefit from) income taxes: Current: Federal and state $ 965 $ 4,718 $ 7,718 Foreign 3,244 1,726 1,423 Total current $ 4,209 $ 6,444 $ 9,141 Deferred: Federal and state $ (4,018 ) $ (5,360 ) $ (10,249 ) Foreign (227 ) (3,283 ) 702 Total deferred $ (4,245 ) $ (8,643 ) $ (9,547 ) Provision for (benefit from) income taxes $ (36 ) $ (2,199 ) $ (406 )
Components of Net Deferred Tax Assets (Liabilities) and Related Valuation Allowance	The following table presents the components of net deferred tax assets (liabilities) and the related valuation allowance (in thousands): December 31, 2015 2014 Deferred tax assets: Net operating loss carry-forward $ 2,509 $ 4,004 Deferred revenue 8,296 10,149 Depreciation and amortization 1,428 1,847 Research tax credit carry-forward 2,869 417 Accrued expenses 2,927 2,720 Stock based compensation 8,181 6,066 Other 7,726 4,077 Total deferred tax assets $ 33,936 $ 29,280 Valuation allowance (312 ) (264 ) Net deferred tax assets $ 33,624 $ 29,016 Deferred tax liabilities: Acquired intangibles $ (6,181 ) $ (4,448 ) Convertible debt discount (28,213 ) (8,717 ) Other (537 ) (69 ) Total deferred tax liabilities $ (34,931 ) $ (13,234 ) Net deferred tax assets $ (1,307 ) $ 15,782
Provisions for Income Taxes Compared with Income Taxes Based on Federal Statutory Tax Rate	The following table presents the provisions for income taxes compared with income taxes based on the federal statutory tax rate of 35% (in thousands): Year ended December 31, 2015 2014 2013 Tax provision (benefit) based on federal statutory rate $ 50 $ (666 ) $ (11 ) State taxes 490 430 617 Impact of foreign operations 201 (508 ) (157 ) Other permanent items 144 193 697 IRC 162(m) add back 222 456 — Stock based compensation 1,096 1,002 (132 ) Change in income tax valuation allowance 16 (2,804 ) 333 Business tax credits (2,302 ) (2,314 ) (1,829 ) Finland intellectual property transfer (324 ) (81 ) — Meals and entertainment 432 198 168 Acquisition costs 248 128 188 Change in tax rates (309 ) 1,767 (280 ) Provision for (benefit from) income taxes $ (36 ) $ (2,199 ) $ (406 )
Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands): Year ended December 31, 2015 2014 2013 Unrecognized tax benefits balance at January 1, $ 4,619 $ 4,875 $ 821 Additions for tax positions of prior years 866 243 4,054 Settlements of tax positions of prior years (558 ) (499 ) — Unrecognized tax benefits balance at December 31, $ 4,927 $ 4,619 $ 4,875

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Summary of Company's Financial Statements	The following table shows the amounts recorded within the Company’s financial statements with respect to the combined 2022 Notes and 2018 Notes (collectively, the "Notes") (in thousands): December 31, December 31, Convertible debt principal $ 270,355 $ 120,000 Unamortized debt discount (77,440 ) (22,951 ) Unamortized debt issuance costs (4,584 ) (1,421 ) Net carrying amount of convertible debt $ 188,331 $ 95,628
Summary of Interest Expense Recognized	The following table presents the interest expense recognized related to the Notes (in thousands): Year ended December 31, 2015 2014 Contractual interest expense $ 2,039 $ 1,800 Amortization of debt issuance costs 1,022 406 Accretion of debt discount 7,547 5,500 Interest expense $ 10,608 $ 7,706
Aggregate Maturities of Borrowings	The aggregate maturities of borrowings as of December 31, 2015 were as follows (in thousands): 2016 - 2017 $ — 2018 69,105 2019 and thereafter 201,250 $ 270,355

Stock-based Compensation (Table

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock-based Compensation Expense Recognized by Company	Stock-based compensation expense recognized by the Company is as follows (in thousands): Year ended December 31, 2015 2014 2013 Stock options $ 7,572 $ 6,814 $ 5,963 Restricted stock units 31,719 19,585 16,449 Performance stock units 1,153 3,874 5,020 Total recognized stock-based compensation expense $ 40,444 $ 30,273 $ 27,432
Summary of Information Related to Stock Options	The following table presents a summary related to stock options for the following periods: Number of Options Outstanding Weighted Average Exercise Price Weighted Average Remaining Contractual Term (years) Aggregate Intrinsic Value (in thousands) Balance, December 31, 2014 1,678,996 $ 26.73 Granted 782,050 32.22 Exercised (310,419 ) 19.94 Forfeited (106,513 ) 31.15 Expired (44,239 ) 36.41 Balance, December 31, 2015 1,999,875 $ 29.48 7.41 $ 13,744 Vested and exercisable at December 31, 2015 1,019,299 $ 28.13 6.13 $ 9,172
Summary of Activity for Restricted Stock Units	The following table presents a summary of activity for RSUs (excluding RSUs that are subject to performance-based vesting conditions (“PSUs”)): Number of RSUs Weighted Average Grant Date Fair Value Balance, December 31, 2014 1,029,787 $ 32.09 Granted 1,466,985 34.02 Vested (923,517 ) 33.36 Forfeited (61,233 ) 33.31 Balance, December 31, 2015 1,512,022 $ 33.14
Schedule Of Share Based Compensation Performance Stock Units Award Activity	The following table presents a summary of activity for PSUs: Number of PSUs Weighted Average Grant Date Fair Value Balance, December 31, 2014 557,588 $ 26.88 Granted — — Vested — — Forfeited (7,500 ) 27.19 Balance, December 31, 2015 550,088 $ 26.87

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Summary of Future Minimum Lease Payments Under Non-cancelable Operating Leases	The following table presents future minimum lease payments under the non-cancelable operating leases (in thousands): Operating Leases Years Ending December 31: 2016 $ 4,743 2017 4,599 2018 4,159 2019 2,558 2020 and thereafter 5,782 Total future minimum lease payments $ 21,841

Segment and Geographic Inform35

Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Schedule of Revenue by Geographic Area	The following table presents revenue and long-lived assets, net, by geographic area (in thousands): Year Ended December 31, 2015 2014 2013 Revenues: United States $ 172,027 $ 106,008 $ 100,857 EMEA 61,114 54,950 44,235 APAC 26,156 41,188 20,990 Other 19,546 14,711 12,411 Total revenue $ 278,843 $ 216,857 $ 178,493 December 31, December 31, Long-Lived Assets, net United States $ 20,862 $ 19,049 EMEA 5,008 2,206 APAC 1,172 379 Other 272 397 Total long-lived assets, net $ 27,314 $ 22,031

Quarterly Financial Data (Una36

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Consolidated Results of Operations by Quarter	Quarterly Financial Data (Unaudited) (in thousands, except per share data): March 31, June 30, September 30, December 31, Total revenue $ 55,671 $ 64,484 $ 69,097 $ 89,591 Gross profit 39,661 44,249 47,451 69,724 Income (loss) from operations (1,275 ) (4,928 ) 822 20,624 Net income (loss) (2,905 ) (5,288 ) (3,250 ) 11,622 Net income (loss) per share: Basic $ (0.10 ) $ (0.18 ) $ (0.11 ) $ 0.40 Diluted $ (0.10 ) $ (0.18 ) $ (0.11 ) $ 0.39 March 31, June 30, September 30, December 31, Total revenue $ 43,918 $ 52,484 $ 54,629 $ 65,826 Gross profit 31,101 37,607 39,420 51,035 Income (loss) from operations (7,129 ) 564 1,879 11,260 Net income (loss) (6,139 ) 1,506 (2,758 ) 7,687 Net income (loss) per share: Basic $ (0.22 ) $ 0.05 $ (0.10 ) $ 0.27 Diluted $ (0.22 ) $ 0.05 $ (0.10 ) $ 0.26

Summary of Significant Accoun37

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)reporting_unitshares	Dec. 31, 2014USD ($)shares	Dec. 31, 2013USD ($)shares	Sep. 30, 2015USD ($)
Summary Of Significant Accounting Policies [Line Items]
Impairment of Long-Lived Assets Held-for-use			$ 0
Number of reporting units | reporting_unit	1
Warranty period for Company's licensed software (in days)	90 days
Capitalized in internal-use software	$ 2,200,000	$ 1,900,000
Amortization of software development cost	$ 1,500,000	700,000	$ 200,000
Recognition period for current portion of deferred revenue no more than twelve months (in months)	12 months
Valuation allowance	$ 312,000	$ 264,000
Weighted average effect of potentially dilutive securities excluded contribution (in shares) | shares	1,203,399	1,369,462	1,047,339
Adjustments for New Accounting Principle, Early Adoption | Other current assets
Summary Of Significant Accounting Policies [Line Items]
Unamortized debt issuance costs				$ 400,000
Adjustments for New Accounting Principle, Early Adoption | Other long-term assets
Summary Of Significant Accounting Policies [Line Items]
Unamortized debt issuance costs		$ 1,000,000
Adjustments for New Accounting Principle, Early Adoption | Non-current Assets
Summary Of Significant Accounting Policies [Line Items]
Current deferred tax assets, net		14,300,000
Adjustments for New Accounting Principle, Early Adoption | Non-current Liabilities
Summary Of Significant Accounting Policies [Line Items]
Current deferred tax liabilities, net		$ 14,300,000

Summary of Significant Accoun38

Summary of Significant Accounting Policies - Summary of Short-Term and Long-Term Investments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Investments In Marketable Securities [Line Items]
Total cash equivalents, carrying value	$ 175,857	$ 101,543	$ 69,866	$ 90,545
Total short term investments, carrying value	72,531	68,923
Total long term investments, carrying value	$ 102,385	$ 52,030
Money market funds
Schedule Of Investments In Marketable Securities [Line Items]
Contracted maturity of cash equivalents	demand	demand
Total cash equivalents, carrying value	$ 123,170	$ 56,847
U.S. agency notes
Schedule Of Investments In Marketable Securities [Line Items]
Contracted maturity of short term investments	50 - 365 days	77 - 240 days
Contracted maturity of long term investments	486 - 851 days	415 - 868 days
Total short term investments, carrying value	$ 39,467	$ 14,078
Total long term investments, carrying value	$ 44,175	$ 37,178
U.S. agency notes | Minimum
Schedule Of Investments In Marketable Securities [Line Items]
Contracted maturity short term investments, range	50 days	77 days
Contracted maturity long term investments, range	486 days	415 days
U.S. agency notes | Maximum
Schedule Of Investments In Marketable Securities [Line Items]
Contracted maturity short term investments, range	365 days	240 days
Contracted maturity long term investments, range	851 days	868 days
Corporate bonds
Schedule Of Investments In Marketable Securities [Line Items]
Contracted maturity of short term investments	12 - 319 days	42 - 357 days
Contracted maturity of long term investments	376 - 846 days	377 - 502 days
Total short term investments, carrying value	$ 33,064	$ 54,845
Total long term investments, carrying value	$ 58,210	$ 14,852
Corporate bonds | Minimum
Schedule Of Investments In Marketable Securities [Line Items]
Contracted maturity short term investments, range	12 days	42 days
Contracted maturity long term investments, range	376 days	377 days
Corporate bonds | Maximum
Schedule Of Investments In Marketable Securities [Line Items]
Contracted maturity short term investments, range	319 days	357 days
Contracted maturity long term investments, range	846 days	502 days

Summary of Significant Accoun39

Summary of Significant Accounting Policies - Investments, Cost vs. Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Investments In Marketable Securities [Line Items]
Cost	$ 175,514	$ 121,056
Gross Unrealized Gains	2	17
Gross Unrealized Losses	(600)	(120)
Fair Value	174,916	120,953
U.S. agency notes
Schedule Of Investments In Marketable Securities [Line Items]
Cost	83,977	51,270
Gross Unrealized Gains	0	13
Gross Unrealized Losses	(334)	(26)
Fair Value	83,643	51,257
Corporate bonds
Schedule Of Investments In Marketable Securities [Line Items]
Cost	91,537	69,786
Gross Unrealized Gains	2	4
Gross Unrealized Losses	(266)	(94)
Fair Value	$ 91,273	$ 69,696

Summary of Significant Accoun40

Summary of Significant Accounting Policies - Summary of Carrying and Fair Value of Company's Financial Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Cash equivalents and certificates of deposit, Carrying Value	$ 123,170	$ 56,864
Short and long-term investments, Carrying Value	174,916	120,953
Total assets, Carrying Value	298,086	177,817
Cash equivalents and certificates of deposit, Fair Value	123,170	56,864
Short and long-term investments, Fair Value	174,916	120,953
Total cash equivalents, certificates of deposit and investments	298,086	177,817
Cash equivalents and certificates of deposit not included in operating cash	$ 52,700	$ 21,600

Summary of Significant Accoun41

Summary of Significant Accounting Policies - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit	$ 123,170	$ 56,864
Total investments	174,916	120,953
Total cash equivalents, certificates of deposit and investments	298,086	177,817
Cash equivalents and certificates of deposit not included in operating cash	52,700	21,600
Assets, fair value, nonrecurring basis subsequent to initial recognition	0	0	$ 0
Liabilities, fair value, nonrecurring basis subsequent to initial recognition	0	0	$ 0
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit	123,170	56,864
Total investments	174,916	120,953
Total cash equivalents, certificates of deposit and investments	298,086	177,817
Fair Value, Measurements, Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit	123,170	56,847
Fair Value, Measurements, Recurring | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit		17
Fair Value, Measurements, Recurring | U.S. agency notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments	83,643	51,257
Fair Value, Measurements, Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments	91,273	69,696
Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit	123,170	56,864
Total investments	0	0
Total cash equivalents, certificates of deposit and investments	123,170	56,864
Level 1 | Fair Value, Measurements, Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit	123,170	56,847
Level 1 | Fair Value, Measurements, Recurring | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit		17
Level 1 | Fair Value, Measurements, Recurring | U.S. agency notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments	0	0
Level 1 | Fair Value, Measurements, Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments	0	0
Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit	0	0
Total investments	174,916	120,953
Total cash equivalents, certificates of deposit and investments	174,916	120,953
Level 2 | Fair Value, Measurements, Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit	0	0
Level 2 | Fair Value, Measurements, Recurring | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit		0
Level 2 | Fair Value, Measurements, Recurring | U.S. agency notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments	83,643	51,257
Level 2 | Fair Value, Measurements, Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments	91,273	69,696
Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit	0	0
Total investments	0	0
Total cash equivalents, certificates of deposit and investments	0	0
Level 3 | Fair Value, Measurements, Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit	0	0
Level 3 | Fair Value, Measurements, Recurring | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and certificates of deposit		0
Level 3 | Fair Value, Measurements, Recurring | U.S. agency notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments	0	0
Level 3 | Fair Value, Measurements, Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments	$ 0	$ 0

Summary of Significant Accoun42

Summary of Significant Accounting Policies - Customers Represented Percentage of Revenue or Accounts Receivable (Detail)	12 Months Ended
	Dec. 31, 2015
Concentration Risk [Line Items]
Accounts Receivable (as a percent)	10.00%
Company A
Concentration Risk [Line Items]
Revenue (as a percent)	13.00%

Summary of Significant Accoun43

Summary of Significant Accounting Policies - Estimated Useful Lives of Related Assets (Detail)	12 Months Ended
	Dec. 31, 2015
Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives of related assets (in years)	3 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful lives of related assets (in years)	5 years
Minimum | Software
Property, Plant and Equipment [Line Items]
Estimated useful lives of related assets (in years)	1 year 6 months
Maximum | Software
Property, Plant and Equipment [Line Items]
Estimated useful lives of related assets (in years)	3 years

Summary of Significant Accoun44

Summary of Significant Accounting Policies - Estimated Useful Lives Used in Computing Amortization (Detail)	12 Months Ended
	Dec. 31, 2015
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives used in computing amortization (in years)	3 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives used in computing amortization (in years)	8 years
Developed technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives used in computing amortization (in years)	2 years
Developed technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives used in computing amortization (in years)	6 years
Tradenames | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives used in computing amortization (in years)	1 year
Tradenames | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives used in computing amortization (in years)	7 years

Summary of Significant Accoun45

Summary of Significant Accounting Policies - Deferred Revenue (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 111,054	$ 101,456
Deferred revenue, current portion	106,483	87,423
Deferred revenue, Non-current portion	4,571	14,033
License software
Deferred Revenue Arrangement [Line Items]
Deferred revenue	33,200	26,495
Subscription and maintenance support
Deferred Revenue Arrangement [Line Items]
Deferred revenue	61,399	52,764
Professional services and other
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 16,455	$ 22,197

Summary of Significant Accoun46

Summary of Significant Accounting Policies - Fair Value of Stock Options Estimated at Weighted Average Assumptions (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Average assumptions:
Risk-free interest rate (as a percent)	1.50%	1.70%	1.50%
Expected dividend yield (as a percent)	0.00%	0.00%	0.00%
Expected volatility (as a percent)	52.00%	53.00%	56.00%
Expected term (years)	6 years 11 months 5 days	7 years 7 months	7 years 6 months

Summary of Significant Accoun47

Summary of Significant Accounting Policies - Net (Loss) Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Net income									$ 179	$ 296	$ 375
Basic (in shares)									29,113	28,654	28,116
Dilutive effect of stock-based awards (in shares)									705	711	595
Diluted (in shares)									29,818	29,365	28,711
Earnings per share:
Basic (in dollars per share)	$ 0.40	$ (0.11)	$ (0.18)	$ (0.10)	$ 0.27	$ (0.10)	$ 0.05	$ (0.22)	$ 0.01	$ 0.01	$ 0.01
Diluted (in dollars per share)	$ 0.39	$ (0.11)	$ (0.18)	$ (0.10)	$ 0.26	$ (0.10)	$ 0.05	$ (0.22)	$ 0.01	$ 0.01	$ 0.01

Summary of Significant Accoun48

Summary of Significant Accounting Policies - Change in Accounting Principles, Consolidated Statement of Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
License software									$ 119,808	$ 103,311	$ 94,408
Subscription and maintenance support									112,836	92,492	69,357
Professional services and other									46,199	21,054	14,728
Total revenue	$ 89,591	$ 69,097	$ 64,484	$ 55,671	$ 65,826	$ 54,629	$ 52,484	$ 43,918	278,843	216,857	178,493
License software									10,231	9,755	8,867
Subscription and maintenance support									38,602	32,984	20,359
Professional services and other									28,925	14,955	10,415
Total cost of revenue									77,758	57,694	39,641
Gross profit	69,724	47,451	44,249	39,661	51,035	39,420	37,607	31,101	201,085	159,163	138,852
Sales and marketing									83,806	69,471	56,822
Research and development									60,749	50,125	45,271
General and administrative									41,287	32,993	29,992
Total operating expenses									185,842	152,589	132,085
Income (loss) from operations	20,624	822	(4,928)	(1,275)	11,260	1,879	564	(7,129)	15,243	6,574	6,767
Interest expense, net									9,386	7,177	6,946
Other, net									5,714	1,300	(148)
Total other expense, net									15,100	8,477	6,798
Income (loss) before income taxes									143	(1,903)	(31)
Benefit from income taxes									(36)	(2,199)	(406)
Net income (loss) per share:	$ 11,622	$ (3,250)	$ (5,288)	$ (2,905)	$ 7,687	$ (2,758)	$ 1,506	$ (6,139)	$ 179	$ 296	$ 375
Basic (in dollars per share)	$ 0.40	$ (0.11)	$ (0.18)	$ (0.10)	$ 0.27	$ (0.10)	$ 0.05	$ (0.22)	$ 0.01	$ 0.01	$ 0.01
Diluted (in dollars per share)	$ 0.39	$ (0.11)	$ (0.18)	$ (0.10)	$ 0.26	$ (0.10)	$ 0.05	$ (0.22)	$ 0.01	$ 0.01	$ 0.01
Basic (in shares)									29,113	28,654	28,116
Diluted (in shares)									29,818	29,365	28,711
Stock-based compensation expense									$ 40,444	$ 30,273	$ 27,432
Cost of revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									7,227	3,862	3,122
Sales and marketing
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									13,821	9,856	8,984
Research and development
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									11,844	10,164	8,800
General and administrative
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									7,552	6,391	6,526
Accounting for Stock-Based Compensation Expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
License software									119,808	103,311	94,408
Subscription and maintenance support									112,836	92,492	69,357
Professional services and other									46,199	21,054	14,728
Total revenue									278,843	216,857	178,493
License software									10,231	9,755	8,867
Subscription and maintenance support									38,602	32,984	20,359
Professional services and other									28,925	14,955	10,415
Total cost of revenue										57,694	39,641
Gross profit										159,163	138,852
Sales and marketing									83,806	69,471	56,822
Research and development									60,749	50,125	45,271
General and administrative									41,287	32,993	29,992
Total operating expenses										152,589	132,085
Income (loss) from operations										6,574	6,767
Interest expense, net									9,386	7,177	6,946
Other, net									5,714	1,300	(148)
Total other expense, net									15,100	8,477	6,798
Income (loss) before income taxes										(1,903)	(31)
Benefit from income taxes									$ (36)	(2,199)	(406)
Net income (loss) per share:										$ 296	$ 375
Basic (in dollars per share)										$ 0.01	$ 0.01
Diluted (in dollars per share)										$ 0.01	$ 0.01
Basic (in shares)									29,113	28,654	28,116
Diluted (in shares)									29,818	29,365	28,711
Accounting for Stock-Based Compensation Expense | Scenario, Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
License software									$ 119,808	$ 103,311	$ 94,408
Subscription and maintenance support									112,836	92,492	69,357
Professional services and other									46,199	21,054	14,728
Total revenue									278,843	216,857	178,493
License software									10,429	9,667	9,241
Subscription and maintenance support									38,896	33,232	21,368
Professional services and other									30,744	14,814	10,771
Total cost of revenue									80,069	57,713	41,380
Gross profit									198,774	159,144	137,113
Sales and marketing									86,092	69,681	62,174
Research and development									61,218	49,515	49,696
General and administrative									41,207	32,729	32,728
Total operating expenses									188,517	151,925	144,598
Income (loss) from operations									10,257	7,219	(7,485)
Interest expense, net									9,386	7,177	6,946
Other, net									5,714	1,300	(148)
Total other expense, net									15,100	8,477	6,798
Income (loss) before income taxes									(4,843)	(1,258)	(14,283)
Benefit from income taxes									(1,687)	(2,270)	(5,409)
Net income (loss) per share:									$ (3,156)	$ 1,012	$ (8,874)
Basic (in dollars per share)									$ (0.11)	$ 0.04	$ (0.32)
Diluted (in dollars per share)									$ (0.11)	$ 0.03	$ (0.32)
Basic (in shares)									29,113	28,654	28,116
Diluted (in shares)									29,113	29,917	28,116
Accounting for Stock-Based Compensation Expense | Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
License software									$ 0	$ 0	$ 0
Subscription and maintenance support									0	0	0
Professional services and other									0	0	0
Total revenue									0	0	0
License software									(198)	88	(374)
Subscription and maintenance support									(294)	(248)	(1,009)
Professional services and other									(1,819)	141	(356)
Total cost of revenue									(2,311)	(19)	(1,739)
Gross profit									2,311	19	1,739
Sales and marketing									(2,286)	(210)	(5,352)
Research and development									(469)	610	(4,425)
General and administrative									80	264	(2,736)
Total operating expenses									(2,675)	664	(12,513)
Income (loss) from operations									4,986	(645)	14,252
Interest expense, net									0	0	0
Other, net									0	0	0
Total other expense, net									0	0	0
Income (loss) before income taxes									4,986	(645)	14,252
Benefit from income taxes									1,651	71	5,003
Net income (loss) per share:									$ 3,335	$ (716)	$ 9,249
Basic (in dollars per share)									$ 0.12	$ (0.03)	$ 0.33
Diluted (in dollars per share)									$ 0.12	$ (0.02)	$ 0.33
Accounting for Stock-Based Compensation Expense | Cost of revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									$ 7,227	$ 3,862	$ 3,122
Accounting for Stock-Based Compensation Expense | Cost of revenue | Scenario, Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									9,538	3,881	4,861
Accounting for Stock-Based Compensation Expense | Cost of revenue | Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									(2,311)	(19)	(1,739)
Accounting for Stock-Based Compensation Expense | Sales and marketing
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									13,821	9,856	8,984
Accounting for Stock-Based Compensation Expense | Sales and marketing | Scenario, Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									16,107	10,066	14,336
Accounting for Stock-Based Compensation Expense | Sales and marketing | Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									(2,286)	(210)	(5,352)
Accounting for Stock-Based Compensation Expense | Research and development
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									11,844	10,164	8,800
Accounting for Stock-Based Compensation Expense | Research and development | Scenario, Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									12,313	9,554	13,225
Accounting for Stock-Based Compensation Expense | Research and development | Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									(469)	610	(4,425)
Accounting for Stock-Based Compensation Expense | General and administrative
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									7,552	6,391	6,526
Accounting for Stock-Based Compensation Expense | General and administrative | Scenario, Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									7,472	6,127	9,262
Accounting for Stock-Based Compensation Expense | General and administrative | Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stock-based compensation expense									$ 80	$ 264	$ (2,736)

Summary of Significant Accoun49

Summary of Significant Accounting Policies - Changes in Accounting Principles, Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jan. 01, 2013	Dec. 31, 2012
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets	$ 1,661	$ 17,074
Accounts payable and accrued expenses	28,667	20,787
Common stock, par value $0.01 per share; 100,000,000 shares authorized at December 31, 2015 and December 31, 2014; 29,080,197 and 28,943,336 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively	291	290
Additional paid-in capital	333,153	258,169
Accumulated other comprehensive loss	(13,810)	(7,712)
Accumulated deficit	(62,601)	(37,786)
Total stockholders’ equity	257,033	212,961	$ 192,859		$ 158,585
Accounting for Stock-Based Compensation Expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets	1,661	17,074
Accounts payable and accrued expenses	28,667	20,787
Common stock, par value $0.01 per share; 100,000,000 shares authorized at December 31, 2015 and December 31, 2014; 29,080,197 and 28,943,336 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively	291	290
Additional paid-in capital	333,153	258,169		$ 199,800
Accumulated other comprehensive loss	(13,810)	(7,712)
Accumulated deficit	(62,601)	(37,786)		38,100
Total stockholders’ equity	257,033	212,961
Accounting for Stock-Based Compensation Expense | Scenario, Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets	11,035	24,797
Accounts payable and accrued expenses	29,498	21,222
Common stock, par value $0.01 per share; 100,000,000 shares authorized at December 31, 2015 and December 31, 2014; 29,080,197 and 28,943,336 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively	291	290
Additional paid-in capital	359,216	279,642		208,100
Accumulated other comprehensive loss	(13,810)	(7,712)
Accumulated deficit	(80,121)	(51,971)		$ 44,100
Total stockholders’ equity	265,576	220,249
Accounting for Stock-Based Compensation Expense | Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets	(9,374)	(7,723)
Accounts payable and accrued expenses	(831)	(435)
Common stock, par value $0.01 per share; 100,000,000 shares authorized at December 31, 2015 and December 31, 2014; 29,080,197 and 28,943,336 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively	0	0
Additional paid-in capital	(26,063)	(21,473)
Accumulated other comprehensive loss	0	0
Accumulated deficit	17,520	14,185
Total stockholders’ equity	$ (8,543)	$ (7,288)

Summary of Significant Accoun50

Summary of Significant Accounting Policies - Changes in Accounting Principles, Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	$ 179	$ 296	$ 375
Depreciation and amortization	15,836	12,391	7,822
Amortization of software licenses	2,848	3,342	2,987
Stock-based compensation expense	40,444	30,273	27,432
Provision for doubtful accounts	4	274	149
Provision for (benefit from) deferred income taxes	(2,741)	(3,477)	(2,055)
Excess tax benefits related to stock-based compensation	(1,809)	(2,950)	(7,492)
Payment of original notes issuance discount	(1,094)	0	0
Non-cash interest expense on convertible senior notes	8,617	5,906	5,504
Accounts receivable	(23,935)	(14,806)	(16,334)
Other current and long-term assets	(4,896)	(4,056)	(1,128)
Accounts payable, accrued expenses and other long-term liabilities	2,234	4,655	(1,799)
Current and long-term deferred revenue	9,099	22,911	16,473
Net cash provided by operating activities	44,786	54,759	31,934
Accounting for Stock-Based Compensation Expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	179	296	375
Depreciation and amortization	15,836	12,391	7,822
Amortization of software licenses	2,848	3,342	2,987
Stock-based compensation expense	40,444	30,273	27,432
Provision for doubtful accounts	4	274	149
Provision for (benefit from) deferred income taxes	(2,741)	(3,477)	(2,055)
Excess tax benefits related to stock-based compensation	(1,809)	(2,950)	(7,492)
Payment of original notes issuance discount	(1,094)
Non-cash interest expense on convertible senior notes	8,617	5,906	5,504
Accounts receivable	(23,935)	(14,806)	(16,334)
Other current and long-term assets	(4,896)	(4,056)	(1,128)
Accounts payable, accrued expenses and other long-term liabilities	2,234	4,655	(1,799)
Current and long-term deferred revenue	9,099	22,911	16,473
Net cash provided by operating activities	44,786	54,759	31,934
Accounting for Stock-Based Compensation Expense | Scenario, Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	(3,156)	1,012	(8,874)
Depreciation and amortization	15,836	12,391	7,822
Amortization of software licenses	2,848	3,342	2,987
Stock-based compensation expense	45,430	29,628	41,684
Provision for doubtful accounts	4	274	149
Provision for (benefit from) deferred income taxes	(4,392)	(3,548)	(7,058)
Excess tax benefits related to stock-based compensation	(1,809)	(2,950)	(7,492)
Payment of original notes issuance discount	(1,094)
Non-cash interest expense on convertible senior notes	8,617	5,906	5,504
Accounts receivable	(23,935)	(14,806)	(16,334)
Other current and long-term assets	(4,896)	(4,056)	(1,128)
Accounts payable, accrued expenses and other long-term liabilities	2,234	4,655	(1,799)
Current and long-term deferred revenue	9,099	22,911	16,473
Net cash provided by operating activities	44,786	54,759	31,934
Accounting for Stock-Based Compensation Expense | Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	3,335	(716)	9,249
Depreciation and amortization	0	0	0
Amortization of software licenses	0	0	0
Stock-based compensation expense	(4,986)	645	(14,252)
Provision for doubtful accounts	0	0	0
Provision for (benefit from) deferred income taxes	1,651	71	5,003
Excess tax benefits related to stock-based compensation	0	0	0
Payment of original notes issuance discount	0
Non-cash interest expense on convertible senior notes	0	0	0
Accounts receivable	0	0	0
Other current and long-term assets	0	0	0
Accounts payable, accrued expenses and other long-term liabilities	0	0	0
Current and long-term deferred revenue	0	0	0
Net cash provided by operating activities	$ 0	$ 0	$ 0

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 03, 2015	Dec. 16, 2013	Aug. 12, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill				$ 65,303		$ 72,275
Aggregate revenue of business acquisition				7,600	$ 2,800
Aggregate net losses of business acquisition				$ 800	$ 300
mPortal, Inc.
Business Acquisition [Line Items]
Consideration paid	$ 14,800
Cash on hand paid to fund acquisition	14,300
Restricted stocks units paid to fund acquisition	500
Business acquisition, transaction costs	700
Goodwill	$ 2,497
mPortal, Inc. | Customer relationships
Business Acquisition [Line Items]
Amortization period of customer relationship intangibles (in years)	8 years
Finocom AG
Business Acquisition [Line Items]
Consideration paid		$ 9,700
Business acquisition, transaction costs		$ 500
Weighted-average amortization period for amortizable intangible assets (in years)		7 years
Goodwill		$ 5,686
Finocom AG | Tradenames
Business Acquisition [Line Items]
Weighted-average amortization period for amortizable intangible assets (in years)		7 years
Finocom AG | Customer relationships
Business Acquisition [Line Items]
Weighted-average amortization period for amortizable intangible assets (in years)		8 years
Finocom AG | Developed technology
Business Acquisition [Line Items]
Weighted-average amortization period for amortizable intangible assets (in years)		5 years
Hosted IP Communications (Europe) Ltd.
Business Acquisition [Line Items]
Consideration paid			$ 26,300
Business acquisition, transaction costs			$ 500
Weighted-average amortization period for amortizable intangible assets (in years)			6 years
Goodwill			$ 18,280
Hosted IP Communications (Europe) Ltd. | Tradenames
Business Acquisition [Line Items]
Weighted-average amortization period for amortizable intangible assets (in years)			1 year
Hosted IP Communications (Europe) Ltd. | Customer relationships
Business Acquisition [Line Items]
Weighted-average amortization period for amortizable intangible assets (in years)			7 years
Hosted IP Communications (Europe) Ltd. | Developed technology
Business Acquisition [Line Items]
Weighted-average amortization period for amortizable intangible assets (in years)			2 years

Acquisitions - Estimated Fair V

Acquisitions - Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Jun. 03, 2015	Dec. 31, 2014	Dec. 16, 2013	Aug. 12, 2013
Business Acquisition [Line Items]
Goodwill	$ 72,275		$ 65,303
Hosted IP Communications (Europe) Ltd.
Business Acquisition [Line Items]
Cash and cash equivalents					$ 215
Accounts receivable					1,187
Other current assets					289
Property and equipment					311
Trade name					310
Customer relationships					7,128
Developed technology					465
Goodwill					18,280
Deferred tax liability					(966)
Accounts payable and accrued expenses					(876)
Total consideration					$ 26,343
Finocom AG
Business Acquisition [Line Items]
Accounts receivable				$ 243
Prepaid expenses and other assets				7
Deferred tax asset				1,080
Property and equipment				64
Trade name				275
Customer relationships				2,610
Developed technology				1,236
Goodwill				5,686
Deferred tax liability				(1,322)
Accounts payable and accrued expenses				(199)
Total consideration				$ 9,680
mPortal, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents		$ 2,748
Accounts receivable		1,920
Prepaid expenses and other assets		293
Deferred tax asset		2,404
Property and equipment		15
Customer relationships		5,600
Goodwill		2,497
Accounts payable and accrued expenses		(677)
Total consideration		$ 14,800

Acquisitions - Schedule of Pro

Acquisitions - Schedule of Pro Forma Information of Acquisitions (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combinations [Abstract]
Revenue	$ 284,292	$ 233,576	$ 184,383
Net income (loss)	$ 1,852	$ (1,311)	$ (98)
Net income (loss) per common share, basic (in dollars per share)	$ 0.06	$ (0.05)	$ 0
Net income (loss) per common share, diluted (in dollars per share)	$ 0.06	$ (0.05)	$ 0

Goodwill and Intangibles - Addi

Goodwill and Intangibles - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets Amortization [Line Items]
Goodwill impairment		$ 0
Increase in goodwill related to acquisitions	$ 9,123,000	2,974,000
Amortization expense on intangible assets	5,800,000	5,400,000	$ 3,900,000
Gross carrying amount of intangible assets retired	5,900,000	1,300,000	$ 1,100,000
Hospitality Software and Service Provider
Finite Lived Intangible Assets Amortization [Line Items]
Increase in goodwill related to acquisitions	3,300,000
mPortal, Inc.
Finite Lived Intangible Assets Amortization [Line Items]
Increase in goodwill related to acquisitions	2,500,000
Finocom AG
Finite Lived Intangible Assets Amortization [Line Items]
Increase in goodwill related to acquisitions	$ 3,300,000
Development Services Company
Finite Lived Intangible Assets Amortization [Line Items]
Increase in goodwill related to acquisitions		$ 3,000,000

Goodwill and Intangibles - Summ

Goodwill and Intangibles - Summary of Changes in Carrying Amounts of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Goodwill, gross, balance at beginning of period	$ 65,303	$ 65,192
Increase in goodwill related to acquisitions	9,123	2,974
Other	(2,151)	(2,863)
Goodwill, gross, balance at end of period	$ 72,275	$ 65,303

Goodwill and Intangibles - Sche

Goodwill and Intangibles - Schedule of Company's Acquired Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 31,146	$ 27,927
Accumulated Amortization	12,311	12,359
Net Amount	18,835	15,568
Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	17,571	14,532
Accumulated Amortization	3,721	5,281
Net Amount	13,850	9,251
Developed technology
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	13,277	13,072
Accumulated Amortization	8,489	7,031
Net Amount	4,788	6,041
Tradenames
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	298	323
Accumulated Amortization	101	47
Net Amount	$ 197	$ 276

Goodwill and Intangibles - Sc57

Goodwill and Intangibles - Schedule of Future Expected Amortization Expense on Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
2,016	$ 5,177
2,017	4,098
2,018	2,767
2,019	2,389
2,020	1,924
2021 and thereafter	2,480
Net Amount	$ 18,835	$ 15,568

Property and Equipment (Detail)

Property and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment gross	$ 45,477	$ 31,984
Less accumulated depreciation and amortization	(25,996)	(17,621)
Property and equipment, net	19,481	14,363
Depreciation and amortization expense	9,800	7,000	$ 3,900
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment gross	26,767	18,754
Software
Property, Plant and Equipment [Line Items]
Property and equipment gross	11,460	7,580
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment gross	1,645	1,213
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment gross	$ 5,605	$ 4,437

Accounts payable and other cu59

Accounts payable and other current liabilities - Schedule of Accounts Payable and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accounts payable and accrued expenses	$ 12,102	$ 8,038
Accrued compensation	11,670	9,428
Other	4,895	3,321
Total accounts payable and other current liabilities	$ 28,667	$ 20,787

Software Licenses - Additional

Software Licenses - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Revenue Disclosure [Abstract]
Amount distributed for licenses	$ 10.2
Amortized cost of revenue period (in years)	4 years
Additional cost for amortized cost of revenue	$ 17.3
Extent annual billed license revenue	850
Amortization expense related to agreement	$ 2.6	$ 2.6	$ 2.6

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Tax Credit Carryforward [Line Items]
Tax credit carryforward	$ 11,100,000	$ 6,000,000
Effects tax benefits not included in deferred tax assets	17,900,000	$ 16,700,000
Deferred tax liability for undistributed earnings	8,800,000
Remaining valuation allowance related to foreign NOLs	$ 300,000
Federal statutory tax rate (as a percent)	35.00%	35.00%	35.00%
Threshold amount to separately disclose tax effect of items	$ 200,000
Recorded interest and penalties	100,000	$ 100,000
Research Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Deferred tax assets, net, noncurrent	1,500,000
Domestic Tax Authority
Tax Credit Carryforward [Line Items]
U.S. net operating loss carryforwards	35,900,000	$ 39,200,000
Tax effect, deferred tax assets, operating loss carryforward	13,900,000
Foreign Tax Authority | General Business Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Deferred tax assets, net, noncurrent	$ 2,500,000

Income Taxes - Components of In

Income Taxes - Components of Income Before Income Taxes and Provision for (Benefit From) Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income (loss) before income taxes:
United States	$ (1,488)	$ (4,769)	$ (974)
Foreign	1,631	2,866	943
Income (loss) before income taxes	143	(1,903)	(31)
Current:
Federal and state	965	4,718	7,718
Foreign	3,244	1,726	1,423
Total current	4,209	6,444	9,141
Deferred:
Federal and state	(4,018)	(5,360)	(10,249)
Foreign	(227)	(3,283)	702
Total deferred	(4,245)	(8,643)	(9,547)
Provision for (benefit from) income taxes	$ (36)	$ (2,199)	$ (406)

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Tax Assets (Liabilities) and Related Valuation Allowance (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Net operating loss carry-forward	$ 2,509	$ 4,004
Deferred revenue	8,296	10,149
Depreciation and amortization	1,428	1,847
Research tax credit carry-forward	2,869	417
Accrued expenses	2,927	2,720
Stock based compensation	8,181	6,066
Other	7,726	4,077
Total deferred tax assets	33,936	29,280
Valuation allowance	(312)	(264)
Net deferred tax assets	33,624	29,016
Deferred tax liabilities:
Acquired intangibles	(6,181)	(4,448)
Convertible debt discount	(28,213)	(8,717)
Other	(537)	(69)
Total deferred tax liabilities	(34,931)	(13,234)
Net deferred tax liabilities	$ (1,307)
Net deferred tax assets		$ 15,782

Income Taxes - Provisions for I

Income Taxes - Provisions for Income Taxes Compared with Income Taxes Based on Federal Statutory Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Tax provision (benefit) based on federal statutory rate	$ 50	$ (666)	$ (11)
State taxes	490	430	617
Impact of foreign operations	201	(508)	(157)
Other permanent items	144	193	697
IRC 162(m) add back	222	456	0
Stock based compensation	1,096	1,002	(132)
Change in income tax valuation allowance	16	(2,804)	333
Business tax credits	(2,302)	(2,314)	(1,829)
Finland intellectual property transfer	(324)	(81)	0
Meals and entertainment	432	198	168
Acquisition costs	248	128	188
Change in tax rates	(309)	1,767	(280)
Provision for (benefit from) income taxes	$ (36)	$ (2,199)	$ (406)

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits balance at January 1,	$ 4,619	$ 4,875	$ 821
Additions for tax positions of prior years	866	243	4,054
Settlements of tax positions of prior years	(558)	(499)	0
Unrecognized tax benefits balance at December 31,	$ 4,927	$ 4,619	$ 4,875

Borrowings - Additional Informa

Borrowings - Additional Information (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2015USD ($)d$ / shares	Dec. 31, 2015USD ($)d$ / shares	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Oct. 31, 2011loan	Jun. 30, 2011USD ($)
Debt Instrument [Line Items]
Aggregate principal amount issued		$ 270,355,000	$ 120,000,000
Unamortized offering costs		4,584,000	1,421,000
Proceeds from issuance of 2022 convertible senior notes, net of issuance costs		194,822,000	0	$ 0
Senior Notes | 2022 Convertible Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount issued	$ 201,300,000
Coupon rate of notes (as a percent)	1.00%
Convertible senior notes due	Sep. 1, 2022
Debt instrument, principal amount of note	$ 1,000
Initial conversion rate for the Notes (in shares)	25.8249
Principal amount of notes, converted amount	$ 1,000
Conversion price of notes (in dollars per share) | $ / shares	$ 38.72
Debt instrument, redemption price, percentage of principal amount redeemed	100.00%
Debt instrument, valuation rate	7.40%
Initial fair value of the liability component	$ 131,300,000	221,100,000
Amount allocated to the embedded conversion option	70,000,000	67,600,000
Offering costs expense payable	6,400,000
Offering costs classified as debt issuance costs	4,200,000
Offering costs allocated to equity component	$ 2,200,000
Unamortized offering costs		4,000,000
Proceeds from issuance of 2022 convertible senior notes, net of issuance costs		$ 194,800,000
Senior Notes | 2022 Convertible Senior Notes | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Number of consecutive or nonconsecutive trading days in condition | d	20
Numbers of consecutive trading days	30 days
Redemption percentage, conversion threshold	130.00%
Senior Notes | 2022 Convertible Senior Notes | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Number of consecutive or nonconsecutive trading days in condition | d	5
Numbers of consecutive trading days	10 days
Redemption percentage, conversion threshold	98.00%
Senior Notes | 2022 Convertible Senior Notes | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Number of consecutive or nonconsecutive trading days in condition | d	20
Numbers of consecutive trading days	30 days
Redemption percentage, conversion threshold	140.00%
Debt instrument, redemption price, percentage of principal amount redeemed	100.00%
Senior Notes | 2018 Convertible Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount issued						$ 120,000,000
Coupon rate of notes (as a percent)						1.50%
Convertible senior notes due		Jul. 1, 2018
Initial conversion rate for the Notes (in shares)		23.8126
Principal amount of notes, converted amount		$ 1,000
Conversion price of notes (in dollars per share) | $ / shares		$ 41.99
Initial fair value of the liability component		$ 42,400,000
Amount allocated to the embedded conversion option		9,500,000
Offering costs expense payable		4,300,000
Offering costs classified as debt issuance costs		2,900,000
Offering costs allocated to equity component		1,400,000
Unamortized offering costs		$ 600,000
Number of business days in conversion condition | d		5
Number of consecutive trading days in condition | d		10
Measurement period adjustment against product (as a percent)		98.00%
Number of trading days in condition		20 or more trading days
Number of consecutive trading days in condition | d		30
Percentage of applicable conversion price		130.00%
Percentage of principal amount of the Notes being repurchased		100.00%
Percentage of applicable conversion price under redemption		140.00%
Number of trading days under redemption		20 or more trading days
Number of consecutive trading days under redemption | d		30
Percentage of interest rate estimated		8.00%
Debt instrument, convertible, initial fair value of liability component		$ 79,400,000
Debt instrument, convertible, initial carrying amount of equity component		40,600,000
Repurchased face amount		50,900,000
Extinguishment of debt, amount		53,400,000
Loss on extinguishment of debt		4,200,000
Debt issuance costs written off		500,000
Debt instrument, convertible, fair value of equity component		6,800,000
Fair value of the Notes		75,300,000	$ 125,100,000
Proceeds from issuance of 2022 convertible senior notes, net of issuance costs		$ 115,700,000
Installment Bank Loan
Debt Instrument [Line Items]
Number of loans | loan					5
Variable interest rate (as a percent)					3.00%

Borrowings - Summary of Company

Borrowings - Summary of Company's Financial Statements (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Convertible debt principal	$ 270,355	$ 120,000
Unamortized debt discount	(77,440)	(22,951)
Unamortized Debt Issuance Expense	(4,584)	(1,421)
Net carrying amount of convertible debt	$ 188,331	$ 95,628

Borrowings - Summary of Interes

Borrowings - Summary of Interest Expense Recognized (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Contractual interest expense	$ 2,039	$ 1,800
Amortization of debt issuance costs	1,022	406
Accretion of debt discount	7,547	5,500
Interest expense	$ 10,608	$ 7,706

Borrowings - Aggregate Maturiti

Borrowings - Aggregate Maturities of Borrowings (Detail) $ in Thousands	Dec. 31, 2015USD ($)
Debt Disclosure [Abstract]
2016-2017	$ 0
2,018	69,105
2019 and thereafter	201,250
Total	$ 270,355

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - shares	Dec. 31, 2015	Dec. 31, 2014	Jun. 21, 2010
Stockholders' Equity Note [Abstract]
Authorized number of shares of preferred stock	5,000,000	5,000,000	5,000,000

Stock-based Compensation - Addi

Stock-based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jan. 01, 2015	Jan. 01, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of stock based grants (in years)	10 years
APIC pool balance	$ 10.7
Net operating loss carryforward excluded from deferred tax asset calculation	$ 50.4	$ 49.9
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of granted stock options (in dollars per share)	$ 33.36
Unrecognized stock-based compensation expense related to unvested options	$ 42.1
Weighted average period of compensation expense to be recognized (in years)	1 year 9 months 28 days
Granted	1,466,985
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of granted stock options (in dollars per share)	$ 0
Unrecognized stock-based compensation expense related to unvested options	$ 0.8
Weighted average period of compensation expense to be recognized (in years)	11 months 6 days
Shares to be received subject to performance conditions	1
Granted	0	205,088
Performance stock units | Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for grants (in years)	3 years
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of granted stock options (in dollars per share)	$ 15.75	$ 12.91	$ 18.09
Intrinsic value of stock options exercised	$ 5.2	$ 1.6	$ 5
Cash received from stock options exercised	6.2	$ 0.7	$ 1.3
Unrecognized stock-based compensation expense related to unvested options	$ 14
Weighted average period of compensation expense to be recognized (in years)	2 years 2 months
Stock-based grants after 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of stock based grants (in years)	5 years
Equity Incentive Plan 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for grants (in years)	4 years
Additional shares of common stock				1,250,000	1,250,000
Shares available for future issuance	917,388
Minimum | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for grants (in years)	3 years
Minimum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for grants (in years)	3 years
Maximum | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for grants (in years)	4 years
Maximum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for grants (in years)	4 years
Equity Incentive Plan 2 | Equity Incentive Plan 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for grants (in years)	3 years

Stock-based Compensation - Summ

Stock-based Compensation - Summary of Stock-based Compensation Expense Recognized by Company (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total recognized stock-based compensation expense	$ 40,444	$ 30,273	$ 27,432
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total recognized stock-based compensation expense	7,572	6,814	5,963
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total recognized stock-based compensation expense	31,719	19,585	16,449
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total recognized stock-based compensation expense	$ 1,153	$ 3,874	$ 5,020

Stock-based Compensation - Su73

Stock-based Compensation - Summary of Information Related to Stock Options (Detail) - Stock options $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)$ / sharesshares
Number of Options Outstanding
Beginning Balance | shares	1,678,996
Granted | shares	782,050
Exercised | shares	(310,419)
Forfeited | shares	(106,513)
Expired | shares	(44,239)
Ending Balance | shares	1,999,875
Vested, Ending Balance | shares	1,019,299
Exercisable, Ending Balance | shares	1,019,299
Weighted Average Exercise Price
Beginning Balance | $ / shares	$ 26.73
Granted | $ / shares	32.22
Exercised | $ / shares	19.94
Forfeited | $ / shares	31.15
Expired | $ / shares	36.41
Ending Balance | $ / shares	29.48
Vested, Ending Balance | $ / shares	28.13
Exercisable, Ending Balance | $ / shares	$ 28.13
Weighted Average Remaining Contractual Term (years)
Term , Ending Balance	7 years 4 months 27 days
Term Vested, Ending Balance	6 years 1 month 16 days
Term, Exercisable, Ending Balance	6 years 1 month 16 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Ending Balance | $	$ 13,744
Aggregate Intrinsic Value Vested, Ending Balance | $	9,172
Aggregate Intrinsic Value, Exercisable, Ending Balance | $	$ 9,172

Stock-based Compensation - Su74

Stock-based Compensation - Summary of Activity for Restricted Stock Units (Detail) - Restricted stock units	12 Months Ended
	Dec. 31, 2015$ / sharesshares
Number of RSUs
Beginning balance | shares	1,029,787
Granted | shares	1,466,985
Vested | shares	(923,517)
Forfeited | shares	(61,233)
Ending balance | shares	1,512,022
Weighted Average Grant Date Fair Value
Beginning balance | $ / shares	$ 32.09
Granted | $ / shares	34.02
Vested | $ / shares	33.36
Forfeited | $ / shares	33.31
Ending balance | $ / shares	$ 33.14

Stock-based Compensation Stock-

Stock-based Compensation Stock-based Compensation - Summary of Activity for Performance Units (Details) - Performance stock units - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Number of PSUs
Beginning balance	557,588
Granted	0	205,088
Forfeited	(7,500)
Ending balance	550,088	557,588
Weighted Average Grant Date Fair Value
Beginning balance	$ 26.88
Granted	0
Vested	0
Forfeited	27.19
Ending balance	$ 26.87	$ 26.88

Commitments and Contingencies76

Commitments and Contingencies (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 4,700	$ 3,600	$ 3,200
2,016	4,743
2,017	4,599
2,018	4,159
2,019	2,558
2020 and thereafter	5,782
Total future minimum lease payments	$ 21,841

Segment and Geographic Inform77

Segment and Geographic Information - Summary of Revenue and Long-Lived Assets, Net, by Geographic Area (Detail) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Jun. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Dec. 31, 2015USD ($)reporting_unit	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of operating segments | reporting_unit									1
Revenues:
Total revenue	$ 89,591	$ 69,097	$ 64,484	$ 55,671	$ 65,826	$ 54,629	$ 52,484	$ 43,918	$ 278,843	$ 216,857	$ 178,493
Long-Lived Assets, net
Total long-lived assets, net	27,314				22,031				27,314	22,031
United States
Revenues:
Total revenue									172,027	106,008	100,857
Long-Lived Assets, net
Total long-lived assets, net	20,862				19,049				20,862	19,049
EMEA
Revenues:
Total revenue									61,114	54,950	44,235
Long-Lived Assets, net
Total long-lived assets, net	5,008				2,206				5,008	2,206
APAC
Revenues:
Total revenue									26,156	41,188	20,990
Long-Lived Assets, net
Total long-lived assets, net	1,172				379				1,172	379
Other
Revenues:
Total revenue									19,546	14,711	$ 12,411
Long-Lived Assets, net
Total long-lived assets, net	$ 272				$ 397				$ 272	$ 397

401(k) Defined Contribution P78

401(k) Defined Contribution Plan - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
401 (k) Plan
Defined Contribution Plan [Line Items]
Contributions to 401(k) plan	$ 3	$ 2	$ 1.8

Quarterly Financial Data (Una79

Quarterly Financial Data (Unaudited) - Consolidated Results of Operations by Quarter (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 89,591	$ 69,097	$ 64,484	$ 55,671	$ 65,826	$ 54,629	$ 52,484	$ 43,918	$ 278,843	$ 216,857	$ 178,493
Gross profit	69,724	47,451	44,249	39,661	51,035	39,420	37,607	31,101	201,085	159,163	138,852
Income (loss) from operations	20,624	822	(4,928)	(1,275)	11,260	1,879	564	(7,129)	15,243	6,574	6,767
Net income (loss) per share:	$ 11,622	$ (3,250)	$ (5,288)	$ (2,905)	$ 7,687	$ (2,758)	$ 1,506	$ (6,139)	$ 179	$ 296	$ 375
Earnings per share:
Basic (in dollars per share)	$ 0.40	$ (0.11)	$ (0.18)	$ (0.10)	$ 0.27	$ (0.10)	$ 0.05	$ (0.22)	$ 0.01	$ 0.01	$ 0.01
Diluted (in dollars per share)	$ 0.39	$ (0.11)	$ (0.18)	$ (0.10)	$ 0.26	$ (0.10)	$ 0.05	$ (0.22)	$ 0.01	$ 0.01	$ 0.01

Subsequent Event Subsequent Eve

Subsequent Event Subsequent Event - Additional Information (Details) $ in Millions	1 Months Ended
	Feb. 29, 2016USD ($)
Transera | Subsequent Event
Subsequent Event [Line Items]
Consideration paid	$ 19.8

Schedule II - Consolidated Va81

Schedule II - Consolidated Valuation Allowance and Qualifying Accounts Schedule II - Consolidated Valuation Allowance and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at the Beginning of Year	$ 286	$ 128	$ 139
Amounts Charged to Operations (1)	4	274	149
Deductions (2)	(205)	(116)	(160)
Additions Acquired from Business Combinations	0	0	0
Balance at End of Year	85	286	128
Valuation Allowance of Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at the Beginning of Year	264	3,297	5,558
Amounts Charged to Operations (1)	5	(3,033)	0
Deductions (2)	0	0	(2,261)
Additions Acquired from Business Combinations	43	0	0
Balance at End of Year	$ 312	$ 264	$ 3,297