Broadsoft (BSFT) 10-K 28 Feb 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Feb. 25, 2014	Jun. 28, 2013
Document Document And Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Trading Symbol	'BSFT	'	'
Entity Registrant Name	'BROADSOFT, INC.	'	'
Entity Central Index Key	'0001086909	'	'
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	'	28,390,134	'
Entity Public Float	'	'	$752

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$69,866	$90,545
Short-term investments	93,664	73,075
Accounts receivable, net of allowance for doubtful accounts of $128 and $139 at December 31, 2013 and December 31, 2012, respectively	66,595	48,980
Deferred tax assets, current	4,559	3,732
Other current assets	12,597	10,796
Total current assets	247,281	227,128
Long-term assets:	'	'
Property and equipment, net	10,110	7,361
Long-term investments	23,340	30,102
Restricted cash	581	584
Intangible assets, net	20,390	11,247
Goodwill	65,192	37,529
Deferred tax assets	16,482	629
Other long-term assets	8,121	12,326
Total long-term assets	144,216	99,778
Total assets	391,497	326,906
Current liabilities:	'	'
Accounts payable and accrued expenses	14,957	15,686
Notes payable and bank loans, current portion	0	555
Deferred revenue, current portion	71,258	49,368
Total current liabilities	86,215	65,609
Convertible senior notes	91,549	86,451
Notes payable and bank loans	0	414
Deferred revenue	6,404	11,781
Deferred tax liabilities	3,506	0
Other long-term liabilities	3,312	1,416
Total liabilities	190,986	165,671
Commitments and contingencies (Note 12)	'	'
Stockholders’ equity:	'	'
Preferred stock, $0.01 par value per share; 5,000,000 shares authorized at December 31, 2013 and December 31, 2012; no shares issued and outstanding at December 31, 2013 and December 31, 2012	0	0
Common stock, par value $0.01 per share; 100,000,000 shares authorized at December 31, 2013 and December 31, 2012; 28,305,143 and 27,913,471 shares issued and outstanding at December 31, 2013 and December 31, 2012, respectively	283	279
Additional paid-in capital	254,736	208,073
Accumulated other comprehensive loss	-1,525	-3,008
Accumulated deficit	-52,983	-44,109
Total stockholders’ equity	200,511	161,235
Total liabilities and stockholders’ equity	$391,497	$326,906

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Allowance for doubtful accounts	$128	$139
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	28,305,143	27,913,471
Common stock, shares outstanding	28,305,143	27,913,471

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue:	'	'	'
License software	$94,408	$89,750	$77,289
Subscription and maintenance support	69,357	58,249	42,462
Professional services and other	14,728	16,843	18,313
Total revenue	178,493	164,842	138,064
Cost of revenue:	'	'	'
License software	9,241	8,643	6,077
Subscription and maintenance support	21,368	14,831	10,419
Professional services and other	10,771	9,012	8,478
Total cost of revenue	41,380	32,486	24,974
Gross profit	137,113	132,356	113,090
Operating expenses:	'	'	'
Sales and marketing	62,174	47,911	38,376
Research and development	49,696	36,178	27,744
General and administrative	32,580	22,863	19,534
Total operating expenses	144,450	106,952	85,654
(Loss) income from operations	-7,337	25,404	27,436
Other expense (income):	'	'	'
Interest income	-454	-455	-278
Interest expense	7,400	6,925	3,592
Total other expense, net	6,946	6,470	3,314
(Loss) income before income taxes	-14,283	18,934	24,122
(Benefit from) provision for income taxes	-5,409	6,858	-8,175
Net (loss) income	-8,874	12,076	32,297
Net (loss) income per common share:	'	'	'
Basic	($0.32)	$0.44	$1.21
Diluted	($0.32)	$0.43	$1.15
Weighted average common shares outstanding:	'	'	'
Basic	28,116	27,581	26,603
Diluted	28,116	28,353	27,987
Stock-based compensation expense included above:	'	'	'
Stock-based compensation expense	41,684	15,022	7,201
Cost of revenue	'	'	'
Stock-based compensation expense included above:	'	'	'
Stock-based compensation expense	4,861	1,831	916
Sales and marketing	'	'	'
Stock-based compensation expense included above:	'	'	'
Stock-based compensation expense	14,336	5,609	1,984
Research and development	'	'	'
Stock-based compensation expense included above:	'	'	'
Stock-based compensation expense	13,225	4,498	1,901
General and administrative	'	'	'
Stock-based compensation expense included above:	'	'	'
Stock-based compensation expense	$9,262	$3,084	$2,400

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]	'	'	'
Net (loss) income	($8,874)	$12,076	$32,297
Other comprehensive income (loss), net of tax:	'	'	'
Foreign currency translation adjustment	1,478	-495	-798
Unrealized gain (loss) on investments	5	44	-23
Total other comprehensive income (loss), net of tax	1,483	-451	-821
Comprehensive (loss) income	($7,391)	$11,625	$31,476

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Total	Common Stock Par Value $0.01 Per Share	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
In Thousands, unless otherwise specified
Balance at beginning of period at Dec. 31, 2010	$52,545	$255	$142,508	($1,736)	($88,482)
Balance at beginning of period, shares at Dec. 31, 2010	'	25,452	'	'	'
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	3,370	16	3,354	'	'
Issuance of common stock for exercise of stock options and vesting of RSUs, net of effect of early exercises and withholding tax, shares	'	1,654	'	'	'
Stock-based compensation expense	6,640	'	6,640	'	'
Equity component of convertible senior notes issuance	39,151	'	39,151	'	'
Tax windfall benefits on exercises of stock options	61	'	61	'	'
Foreign currency translation adjustment	-798	'	'	-798	'
Unrealized gain (loss) on investments	-23	'	'	-23	'
Net (loss) income	32,297	'	'	'	32,297
Balance at end of period at Dec. 31, 2011	133,243	271	191,714	-2,557	-56,185
Balance at end of period, shares at Dec. 31, 2011	'	27,106	'	'	'
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	827	8	819	'	'
Issuance of common stock for exercise of stock options and vesting of RSUs, net of effect of early exercises and withholding tax, shares	'	807	'	'	'
Stock-based compensation expense	15,022	'	15,022	'	'
Tax windfall benefits on exercises of stock options	579	'	579	'	'
Tax shortfall on exercises of stock options	-61	'	-61	'	'
Foreign currency translation adjustment	-495	'	'	-495	'
Unrealized gain (loss) on investments	44	'	'	44	'
Net (loss) income	12,076	'	'	'	12,076
Balance at end of period at Dec. 31, 2012	161,235	279	208,073	-3,008	-44,109
Balance at end 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	-1,692	4	-1,696	'	'
Issuance of common stock for exercise of stock options and vesting of RSUs, net of effect of early exercises and withholding tax, shares	'	392	'	'	'
Stock-based compensation expense	41,684	'	41,684	'	'
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 (loss) income	-8,874	'	'	'	-8,874
Balance at end of period at Dec. 31, 2013	$200,511	$283	$254,736	($1,525)	($52,983)
Balance at end of period, shares at Dec. 31, 2013	'	28,305	'	'	'

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:	'	'	'
Net (loss) income	($8,874)	$12,076	$32,297
Adjustment to reconcile net (loss) income to net cash provided by operating activities:	'	'	'
Depreciation and amortization	7,822	5,242	3,119
Amortization of software licenses	2,987	2,910	1,820
Stock-based compensation expense	41,684	15,022	7,201
Release of tax valuation allowance	0	0	-8,946
Provision for (recoveries of) doubtful accounts	149	644	-56
(Benefit from) provision for deferred income taxes	-7,058	5,667	66
Excess tax benefit related to share-based compensation	-7,492	-579	-61
Non-cash interest expense on convertible senior notes	5,504	5,120	2,560
Other	0	0	24
Changes in operating assets and liabilities, net of acquisitions:	'	'	'
Accounts receivable	-16,334	-2,557	-5,997
Other current and long-term assets	-1,128	-16,414	-511
Accounts payable, accrued expenses and other long-term liabilities	-1,799	-1,125	238
Current and long-term deferred revenue	16,473	4,013	-3,240
Net cash provided by operating activities	31,934	30,019	28,514
Cash flows from investing activities:	'	'	'
Purchases of property and equipment	-5,789	-3,923	-2,421
Payments for acquisitions, net of cash acquired	-37,793	-25,177	-16,748
Purchases of marketable securities	-117,067	-179,886	-137,305
Proceeds from sale of marketable securities	0	3,000	11,267
Proceeds from maturities of marketable securities	103,240	171,458	46,962
Purchase of intangible assets resulting from contingent consideration	0	0	-905
Change in restricted cash	3	375	14
Net cash used in investing activities	-57,406	-34,153	-99,136
Cash flows from financing activities:	'	'	'
Proceeds from issuance of convertible senior notes, net of issuance costs	0	0	115,688
Proceeds from the exercise of stock options	1,285	2,459	3,943
Taxes paid on vesting of RSUs	-2,977	-2,198	-574
Excess tax benefit related to share-based compensation	7,492	579	61
Notes payable and bank loans—payments	-969	-382	-1,626
Net cash provided by financing activities	4,831	458	117,492
Effect of exchange rate changes on cash and cash equivalents	-38	149	-52
Net (decrease) increase in cash and cash equivalents	-20,679	-3,527	46,818
Cash and cash equivalents, beginning of period	90,545	94,072	47,254
Cash and cash equivalents, end of period	69,866	90,545	94,072
Supplemental disclosures:	'	'	'
Cash paid for interest	1,895	905	1,032
Cash paid for income taxes	$422	$1,363	$385

Nature_of_Business

Nature of Business	12 Months Ended
	Dec. 31, 2013
Text Block [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 mobile, fixed-line and cable service providers to deliver hosted, or cloud-based, Unified Communications and other voice and multimedia services over their Internet protocol, or IP, based networks. The Company’s core communications platform consists of three offerings: BroadWorks, BroadCloud and BroadTouch.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Text Block [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.
	Revision of Prior Period Amounts
	The Company revised the presentation of excess tax benefit related to share based compensation in the statement of cash flows for the years ended December 31, 2012 and 2011. This item was previously reflected as a cash inflow from operating activities rather than financing activities. The revision decreased cash flows from operating activities and increased cash flows from financing activities by $0.6 million and $0.1 million for the years ended December 31, 2012 and 2011, respectively. There was no impact on cash and cash equivalents. The Company concluded that the correction was immaterial to all prior annual and quarterly periods.
	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 long-term restricted cash of $0.6 million at December 31, 2013 and 2012.
	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, 2013						December 31, 2012
		Contracted		Carrying				Contracted		Carrying
		Maturity		Value				Maturity		Value
				(in thousands)						(in thousands)
	Money market funds	demand		$	48,256			demand		$	63,189
	Total cash equivalents			$	48,256					$	63,189
	U.S. agency notes	2 - 329 days		$	35,534			17 - 304 days		$	25,632
	Commercial paper	7 - 31 days		4,999				3 - 214 days		27,489
	Corporate bonds	10 - 325 days		53,131				31 - 227 days		19,954
	Total short-term investments			$	93,664					$	73,075
	U.S. agency notes	386 - 605 days		$	15,006			399 - 610 days		$	18,135
	Corporate bonds	407 - 472 days		8,334				389 - 560 days		11,967
	Total long-term investments			$	23,340					$	30,102
	The following table summarizes the Company's investments at December 31, 2013 (in thousands):
		Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
	U.S. agency notes	$	50,533			$	18			$	(11	)		$	50,540
	Commercial paper	4,999				—				—				4,999
	Corporate bonds	61,448				41				(24		)		61,465
	Total investments	$	116,980			$	59			$	(35	)		$	117,004
	The following table summarizes the Company's investments at December 31, 2012 (in thousands):
		Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
	U.S. agency notes	$	43,750			$	17			$	—			$	43,767
	Commercial paper	27,487				2				—				27,489
	Corporate bonds	31,921				11				(11		)		31,921
	Total investments	$	103,158			$	30			$	(11	)		$	103,177
	Fair Value Measurements
	The following table summarizes the carrying and fair value of the Company’s financial assets (in thousands):
		December 31, 2013								December 31, 2012
		Carrying				Fair Value				Carrying				Fair Value
		Value								Value
	Assets
	Cash equivalents and certificates of deposit *	$	48,837			$	48,837			$	63,795			$	63,795
	Short and long-term investments	117,004				117,004				103,177				103,177
	Total assets	$	165,841			$	165,841			$	166,972			$	166,972
	*	Includes $0.6 million of restricted cash as of December 31, 2013 and 2012 and excludes $21.6 million and $27.4 million of operating cash balances as of December 31, 2013 and 2012, 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
		2013
	Money market funds	$	48,256			$	48,256			$	—			$	—
	Certificates of deposit	581				581				—				—
	Total cash equivalents and certificates of deposit *	48,837				48,837				—				—
	U.S. agency notes	50,540				—				50,540				—
	Commercial paper	4,999				—				4,999				—
	Corporate bonds	61,465				—				61,465				—
	Total investments	117,004				—				117,004				—
	Total cash equivalents, certificates of deposit and investments	$	165,841			$	48,837			$	117,004			$	—
	December 31,				Level 1				Level 2				Level 3
	2012
Money market funds	$	63,189			$	63,189			$	—			$	—
Certificates of deposit	606				606				—				—
Total cash equivalents and certificates of deposit *	63,795				63,795				—				—
U.S. agency notes	43,767				—				43,767				—
Commercial paper	27,489				—				27,489				—
Corporate bonds	31,921				—				31,921				—
Total investments	103,177				—				103,177				—
Total cash equivalents, certificates of deposit and investments	$	166,972			$	63,795			$	103,177			$	—
*	Includes $0.6 million of restricted cash as of December 31, 2013 and 2012 and excludes $21.6 million and $27.4 million of operating cash balances as of December 31, 2013 and 2012, 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 other-than-temporarily impaired. During the years ended December 31, 2013, 2012 and 2011, there were no fair value measurements of 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 customers represented 10% or more of revenue or accounts receivable:
	Year Ended December 31,							December 31,
	2013		2012		2011			2013			2012
	Revenue							Accounts Receivable
Company A	*		*		11	%		13	%		16	%
*	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 results of the Company’s annual goodwill impairment testing, there was no indication of impairment as of December 31, 2013, 2012 or 2011. (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, 2013, 2012 or 2011. (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
Non-compete agreement	1 year
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. Assets to be disposed of are recorded at the lower of the carrying amount or fair value less costs to sell. 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. There was no impairment of long-lived assets during the years ended December 31, 2013, 2012 or 2011.
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, professional services and subscription and usage fees related to the cloud offering. 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 less than 1% 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 the 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 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 and is generally recognized as services are performed. 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, 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 in which 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 $1.1 million and $0.3 million in internal-use software during the years ended December 31, 2013 and 2012, respectively. Capitalized internal-use software is included in property and equipment.
The Company recorded amortization expense related to these assets of approximately $0.2 million during the year ended December 31, 2013. The Company did not record any amortization expense related to these assets during the years ended December 31, 2012 or 2011.
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,
	2013				2012
License software	$	20,149			$	18,375
Subscription and maintenance support	46,975				35,701
Professional services and other	10,538				7,073
Total	$	77,662			$	61,149
Current portion	$	71,258			$	49,368
Non-current portion	6,404				11,781
Total	$	77,662			$	61,149
Cost of Revenue
Cost of revenue includes (a) royalties 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) intangible asset amortization expense related to acquired technology.
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 and stock-based compensation expense. The Company has a valuation allowance of approximately $3.3 million against its net deferred tax assets in certain foreign jurisdictions. 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 the grant is measured based on the estimated fair value of the stock award at the date of the grant, using a binomial options pricing model, or binomial lattice model. 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 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,
	2013			2012			2011
Average assumptions:
Risk-free interest rate	1.5	%		1	%		1.5	%
Expected dividend yield	—	%		—	%		—	%
Expected volatility	56	%		57	%		58	%
Expected term (years)	7.5 years			7.5 years			7.6 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 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 (Loss) Income Per Common Share
Basic net (loss) 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, restricted stock units ("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 (loss) income represents the numerator and weighted average common shares outstanding represents the denominator:
	Year Ended December 31,
	2013				2012				2011
	(in thousands, except per share data)
Net (loss) income	$	(8,874	)		$	12,076			$	32,297
Weighted average basic common shares outstanding	28,116				27,581				26,603
Dilutive effect of stock-based awards	—				772				1,384
Weighted average diluted common shares outstanding	28,116				28,353				27,987
(Loss) earnings per share:
Basic	$	(0.32	)		$	0.44			$	1.21
Diluted	$	(0.32	)		$	0.43			$	1.15
Due to the cash settlement feature of the principal amount of the convertible senior notes, we only include the impact of the premium feature in our 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, 2013, 2012 or 2011.
For the year ended December 31, 2013, the weighted average number of shares outstanding used in the computation of diluted loss per share does not include the effect of stock-based awards convertible to 944,499 shares of common stock as the effect would have been anti-dilutive given the Company's loss for the year. For the years ended December 31, 2013, 2012 and 2011, certain stock options were not included in the computation of diluted earnings per share as their effect was anti-dilutive because the exercise prices exceeded the average market price of the Company’s common stock during these periods. The weighted average effect of potentially dilutive securities that have been excluded from the calculation of diluted net income per common share because the effect was anti-dilutive was 1,927,664, 575,327 and 96,932 for the years ended December 31, 2013, 2012 and 2011, respectively.
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.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Acquisitions	'
	Acquisitions
	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 enables 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 preliminarily allocated to the assets acquired and liabilities assumed based on estimated fair values as of the acquisition date. The Company has not finalized the purchase price allocation for this acquisition.
	The following table summarizes the estimated fair value of the assets acquired and liabilities assumed at the acquisition date of December 16, 2013 (in thousands):
	Accounts receivable	243
	Other current 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 initial purchase price allocation is preliminary as of December 31, 2013. Changes to amounts recorded as assets or liabilities as additional information is received may result in a corresponding adjustment to 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 enables 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 preliminarily allocated to the assets acquired and liabilities assumed based on estimated fair values as of the acquisition date. The Company has not finalized the purchase price allocation for this acquisition.
	The following table summarizes the estimated 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 initial purchase price allocation is preliminary as of December 31, 2013. Changes to amounts recorded as assets or liabilities as additional information is received may result in a corresponding adjustment to 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.
	Adaption Technologies Ventures, Ltd.
	On August 6, 2012, the Company completed its acquisition of substantially all the assets of Adaption Technologies Ventures, Ltd. (“Adaption”), a provider of hosted business VoIP solutions. The acquisition enabled the Company to enhance its BroadCloud Software-as-a-Service delivery platform.
	The total cash consideration paid for Adaption was $22.0 million and the Company funded the acquisition with cash on hand. The Company incurred $0.4 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, 2012.
	The consolidated financial statements include the results of Adaption 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 Company finalized the purchase price allocation for this acquisition in 2013.
	The following table summarizes the fair value of the assets acquired and liabilities assumed at the acquisition date of August 6, 2012 (in thousands):
	Accounts receivable	$	19
	Prepaid expenses and other assets	110
	Property and equipment	239
	Trade name	140
	Customer relationships	200
	Developed technology	4,700
	Goodwill	16,747
	Accounts payable and accrued expenses	(155		)
	Total consideration	$	22,000
	Developed technology represents purchased technology that reached technological feasibility and for which Adaption had substantially completed development as of the date of acquisition. Fair value was determined using estimated future discounted cash flows related to the projected income stream of the developed technology for a discrete projection period. Key assumptions included a discount factor of 13% and estimates of revenue growth, cost of revenue, operating expenses and taxes.
	The customer relationships, trade name and developed technology are being amortized on a straight-line basis over a period of three years, two years, and five years, respectively, which reflects the cash flows generated from such assets. The weighted-average amortization period for depreciable intangible assets acquired is approximately four years.
	The excess of purchase consideration over the fair value of the net tangible and identifiable intangible assets acquired of $16.7 million was recorded as goodwill. The goodwill balance is attributable to 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.
	Movial
	On October 21, 2011, the Company completed its acquisition of all of the outstanding shares of Movial Applications Oy (“Movial”), a client developer for IP communications services. The acquisition enabled the Company to enhance its BroadTouch platform.
	The total cash consideration paid for Movial was approximately $6.0 million and the Company funded the acquisition with cash on hand. 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, 2011.
	The consolidated financial statements include the results of Movial 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 Company finalized the purchase price allocation for this acquisition in 2012.
	The following table summarizes the fair value of the assets acquired and liabilities assumed at the acquisition date of October 21, 2011 (in thousands):
	Cash and cash equivalents	$	83
	Customer relationships	220
	Developed technology	1,718
	Goodwill	5,250
	Accounts payable and accrued expenses	(302		)
	Debt	(1,009		)
Total consideration	$	5,960
Developed technology represents purchased technology that reached technological feasibility and for which Movial had substantially completed development as of the date of acquisition. Fair value was determined using estimated future discounted cash flows related to the projected income stream of the developed technology for a discrete projection period. Key assumptions included a discount factor of 15% and estimates of revenue growth, cost of revenue, operating expenses and taxes.
The customer relationships and developed technology are being amortized on a straight-line basis over a period of three 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 five years.
The excess of purchase consideration over the fair value of the net tangible and identifiable intangible assets acquired of $5.3 million was recorded as goodwill. The goodwill balance is attributable to 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.
iLinc
On September 30, 2011, the Company completed its acquisition of all outstanding shares of iLinc Communications, Inc. (“iLinc”). iLinc is a provider of web collaboration services for global businesses, governments and educational institutions. The acquisition of iLinc and its web collaboration SaaS offering complements BroadSoft’s BroadCloud services capabilities.
The total cash consideration paid for iLinc was $11.1 million and the Company funded the acquisition with cash on hand. The Company incurred $0.4 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, 2011.
The consolidated financial statements include the results of iLinc 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 Company finalized the purchase price allocation for this acquisition in 2011.
The following table summarizes the fair value of the assets acquired and liabilities assumed at the acquisition date of September 30, 2011 (in thousands):
Cash and cash equivalents	$	320
Accounts receivable	504
Prepaid expenses and other assets	54
Property and equipment	34
Trade name	1,400
Customer relationships	100
Developed technology	3,100
Goodwill	4,895
Deferred tax asset	2,629
Accounts payable and accrued expenses	(830		)
Deferred revenue	(1,098		)
Total consideration	$	11,108
Developed technology represents purchased technology that reached technological feasibility and for which iLinc had substantially completed development as of the date of acquisition. Fair value was determined using estimated future discounted cash flows related to the projected income stream of the developed technology for a discrete projection period. Key assumptions included a discount factor of 11.5% and estimates of revenue growth, cost of revenue, operating expenses and taxes.
The customer relationships, trade name and developed technology are being amortized on a straight-line basis over a period of four years, three years, and five years, respectively, which in general reflects the cash flows generated from such assets. The weighted-average amortization period for amortizable intangible assets acquired is approximately four years.
The excess of purchase consideration over the fair value of the net tangible and identifiable intangible assets acquired of $4.9 million was recorded as goodwill. The goodwill balance is attributable to 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 finocom, HIPCOM and Adaption (unaudited)
The businesses acquired in 2013 contributed aggregate revenue of $2.8 million and net losses of $0.3 million for the period from the relevant acquisition date to December 31, 2013. The businesses acquired in 2012 contributed aggregate revenue of $1.5 million and net losses of $0.2 million for the period from the acquisition date to December 31, 2012.
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,
	2013			2012
	(In thousands except per share data)
Revenue	$	184,383		$	173,576
Net (loss) income	(9,347		)	7,776
Net (loss) income per common share, basic	$	(0.33	)	$	0.28
Net (loss) income per common share, diluted	$	(0.33	)	$	0.27

Goodwill_and_Intangibles

Goodwill and Intangibles	12 Months Ended
	Dec. 31, 2013
Text Block [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, 2013, 2012 or 2011.
	The following table provides a summary of the changes in the carrying amounts of goodwill (in thousands):
	Balance as of December 31, 2011	$	17,276
	Increase in goodwill related to acquisitions	19,924
	Other	329
	Balance as of December 31, 2012	37,529
	Increase in goodwill related to acquisitions	26,106
	Other	1,557
	Balance as of December 31, 2013	$	65,192
	For the year ended December 31, 2013, the increase in "goodwill related to acquisitions" consists of $18.3 million of goodwill related to the acquisition of HIPCOM, $5.7 million of goodwill related to the acquisition of finocom and $2.1 million of goodwill related to the acquisition of a development services company in September 2013. For the year ended December 31, 2012, the increase in “goodwill related to acquisitions” consists of $3.2 million of goodwill related to the acquisition in April 2012 of a research and development workforce and $16.7 million of goodwill related to the acquisition of Adaption in August 2012. Any changes in the goodwill amounts resulting from foreign currency translations are presented as “Other” in the above table.
	The Company’s acquired intangible assets are subject to amortization. The following is a summary of intangible assets (in thousands):
		31-Dec-13						31-Dec-12
		Gross		Accumulated		Net		Gross		Accumulated		Net
		Carrying		Amortization		Amount		Carrying		Amortization		Amount
		Amount						Amount
	Customer relationships	$	14,698	$	3,362	$	11,336	$	5,255	$	2,765	$	2,490
	Developed technology	12,948		4,433		8,515		11,218		2,643		8,575
	Non-compete agreement	—		—		—		111		111		—
	Trade name	874		335		539		369		187		182
	Total	$	28,520	$	8,130	$	20,390	$	16,953	$	5,706	$	11,247
	Amortization expense on intangible assets was approximately $3.9 million, $2.7 million and $1.3 million in 2013, 2012 and 2011, respectively. In addition, in 2013, the Company retired $1.1 million of fully amortized intangible assets, impacting both the gross carrying amount and accumulated amortization by this amount. As of December 31, 2013, future amortization expense on intangible assets is expected to be as follows (in thousands):
	2014	$	5,333
	2015	4,729
	2016	3,453
	2017	2,338
	2018	1,763
	2019 and thereafter	2,774
	Total amortization expense	$	20,390

Property_and_Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Property and Equipment	'
	Property and Equipment
	Property and equipment consists of the following (in thousands):
		December 31,
		2013			2012
	Equipment	$	13,421		$	9,607
	Software	5,256			3,346
	Furniture and fixtures	1,098			783
	Leasehold improvements	3,383			3,167
		23,158			16,903
	Less accumulated depreciation and amortization	(13,048		)	(9,542		)
	Property and equipment, net	$	10,110		$	7,361
	Depreciation and amortization expense related to property and equipment for the years ended December 31, 2013, 2012 and 2011 was approximately $3.9 million, $2.6 million and $1.8 million, respectively.

Accounts_payable_and_other_cur

Accounts payable and other current liabilities	12 Months Ended
	Dec. 31, 2013
Text Block [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,
		2013		2012
	Accounts payable and accrued expenses	$	5,744	$	7,237
	Accrued compensation	6,651		6,371
	Other	2,562		2,078
		$	14,957	$	15,686

Software_Licenses

Software Licenses	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Software Licenses	'
	Software Licenses
	The Company was previously party to an agreement that provided the Company the right to distribute certain third-party software on a per-user basis up to 35,000,000 licenses over a four-year period, for $6.4 million. The arrangement required the Company to pay a per-user license fee for licenses distributed in excess of 35,000,000. The cost was amortized to cost of revenue over the 3.5 year period ended May 2012, based on the greater of actual usage or the straight line method. In 2011, the Company entered into a new agreement that provides the Company the right to distribute this third-party software on an unlimited basis through May 2016 at a total cost of $10.2 million. To the extent annual billed license software revenue over the four-year period exceeds $460 million, the Company would be required to pay additional fees. The additional cost of $10.2 million is being amortized to cost of revenue over the four-year period beginning June 2012 (the expiration date of the previous agreement), based on the straight line method.
	Amortization expense related to these agreements was approximately $2.6 million, $2.8 million and $1.8 million for each of the years ended December 31, 2013, 2012 and 2011, respectively.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Text Block [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,
		2013			2012			2011
	(Loss) income before income taxes:
	United States	$	(15,226	)	$	23,429		$	25,178
	Foreign	943			(4,495		)	(1,056		)
	(Loss) income before income taxes	$	(14,283	)	$	18,934		$	24,122
	Provision for (benefit from) income taxes:
	Current:
	Federal and state	$	7,718		$	407		$	4
	Foreign	1,423			(1,355		)	760
	Total current	$	9,141		$	(948	)	$	764
	Deferred:
	Federal and state	$	(15,240	)	$	8,068		$	(8,946	)
	Foreign	690			(262		)	7
	Total deferred	$	(14,550	)	$	7,806		$	(8,939	)
	Provision for (benefit from) income taxes	$	(5,409	)	$	6,858		$	(8,175	)
	The following table presents the components of net deferred tax assets (liabilities) and the related valuation allowance (in thousands):
		December 31,
		2013			2012
	Deferred tax assets:
	Net operating loss carry-forward	$	5,993		$	9,140
	Deferred revenue	5,694			3,616
	Depreciation and amortization	986			704
	Research tax credit carry-forward	1,291			2,467
	Accrued expenses	2,009			1,637
	Stock based compensation	16,129			5,370
	Other	4,110			880
	Total deferred tax assets	$	36,212		$	23,814
	Valuation allowance	(3,297		)	(5,558		)
	Net deferred tax assets	$	32,915		$	18,256
	Deferred tax liabilities
	Acquired intangibles	$	(4,381	)	$	(1,568	)
	Convertible debt discount	(10,913		)	(12,082		)
	Other	(71		)	(244		)
	Total deferred tax liabilities	$	(15,365	)	$	(13,894	)
	Net deferred tax assets	$	17,550		$	4,362
	At December 31, 2013, the Company had U.S. net operating loss carryforwards of approximately $63.6 million and research and experimentation tax credit carryforwards of $2.3 million, which are scheduled to begin to expire in 2019. 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 $3.9 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.
	Based upon the Company’s cumulative operating results through June 30, 2011 and an assessment of its expected future results of operations, the Company determined that there was significant positive evidence regarding the realization of its U.S. deferred tax assets. After weighing both the positive and negative evidence, coupled with the continued success in commercializing its core products and services both inside and outside the U.S., the Company believes that it is more likely than not that its U.S. deferred tax assets will be realized. A portion of the U.S. valuation allowance was released in the period ended June 30, 2011 based on the amount of U.S. net deferred tax assets then expected to be remaining as of December 31, 2011. As of December 31, 2011, the Company reversed all of the remaining valuation allowance on the U.S. deferred tax assets because it was more likely than not that those deferred tax assets would be realized. As of December 31, 2013, the Company has a remaining valuation allowance of approximately $3.3 million, which primarily relates to certain foreign NOLs and tax credits 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 2014, 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,
		2013			2012			2011
	Tax provision based on federal statutory rate	$	(4,999	)	$	6,437		$	8,210
	State taxes	617			723			947
	Foreign rate differential	(157		)	104			(54		)
	Permanent items	1,503			67			460
	Stock based compensation	(147		)	938			478
	Change in income tax valuation allowance	333			1,756			(16,388		)
	Business tax credits	(1,829		)	(3,258		)	(1,204		)
	Other	(730		)	91			(624		)
	Provision for (benefit from) income taxes	$	(5,409	)	$	6,858		$	(8,175	)
	For the year ended December 31, 2012 the tax provision was positively impacted by $1.9 million due to the recognition of business tax credits relating to prior years. These credits were not recorded until the Company obtained a sufficient history of acceptance for the credits by the tax authorities.
	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, 2012 and 2011, there was no material adjustment in the liability for unrecognized income tax benefits and no new 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,
		2013			2012			2011
	Unrecognized tax benefits balance at January 1,	$	821		$	625		$	618
	Additions for tax positions of prior years	4,054			196			77
	Settlements of tax positions of prior years	—			—			(70		)
Unrecognized tax benefits balance at December 31,	$	4,875		$	821		$	625
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, 2013. The Company recorded no interest and penalties during the years ended December 31, 2012 or 2011. 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 2009, with the exception that operating loss or tax credit carryforwards generated prior to 2008 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 2007.

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Borrowings	'
	Borrowings
	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 “Notes”). The 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 Notes may be converted by the holders of Notes 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 Notes for redemption. The 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 Notes is 23.8126 shares of the Company’s common stock per $1,000 principal amount of 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 Notes (the “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 Notes in connection with such make-whole fundamental change. Upon conversion, the Company will pay cash up to the aggregate principal amount of the 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 Notes being converted.
	Holders of the Notes may require the Company to repurchase some or all of the Notes for cash, subject to certain exceptions, upon a fundamental change, as defined in the Indenture, at a repurchase price equal to 100% of the principal amount of the Notes being repurchased, plus any accrued and unpaid interest up to but excluding the relevant repurchase date.
	The Company may not redeem the Notes prior to July 1, 2015. Beginning July 1, 2015, the Company may redeem for cash all or part of the Notes (except for the 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 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 Notes called for redemption prior to the maturity date, including 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 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 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 interest method, through July 2018, the maturity date of the 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 in other assets.
	The fair value of the Notes as of December 31, 2013 and 2012 was $123.2 million and $135.8 million, respectively. The carrying amount of the equity component of the Notes was $28.5 million at December 31, 2013. The unamortized offering costs at December 31, 2013 were $1.8 million which is being amortized as interest expense through the July 2018 maturity date of the Notes. The remaining $1.4 million of offering costs were allocated to the equity component.
	The following table shows the amounts recorded within the Company’s financial statements with respect to the Notes (in thousands):
		December 31,			December 31,
		2013			2012
	Convertible debt principal	$	120,000		$	120,000
	Unamortized debt discount	(28,451		)	(33,549		)
	Net carrying amount of convertible debt	$	91,549		$	86,451
	The following table presents the interest expense recognized related to the Notes (in thousands):
		Year ended
		December 31,
		2013			2012
	Contractual interest expense	$	1,800		$	1,800
	Amortization of debt issuance costs	406			406
	Accretion of debt discount	5,098			4,714
	Net interest expense	$	7,304		$	6,920
	The net proceeds from the Note offering were approximately $115.7 million, after deducting discounts to the initial purchasers and offering expenses payable by the Company.
	Installment Bank Loans
	In May 2008, the Company amended a software license and maintenance agreement that provided the Company the right to distribute third party software for a one-time fee of approximately $6.4 million. The agreement was financed with an installment bank loan with an effective interest rate of 4.0%. The loan provided for a payment of $0.4 million at loan inception and scheduled principal repayments of $0.4 million each quarter commencing July 1, 2008, with the final payment due on April 1, 2012. At March 31, 2012, the loan was paid in full.
	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 is variable, with the interest rate equal to three percent at the time of repayment. As of December 31, 2012, the aggregate balance of the loans was approximately $1.0 million.
	Fair Value of Borrowings
	Fair value for the Company’s borrowings is estimated using quoted market price of the Notes at December 31, 2013, 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, 2013 were as follows (in thousands):
	2013 - 2016	$	—
	2017 and thereafter, and thereafter	120,000
		$	120,000

Stockholders_Equity_Deficit

Stockholders' Equity (Deficit)	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Stockholders' Equity (Deficit)	'
	Stockholders’ Equity (Deficit)
	Preferred Stock
	Pursuant to the Company’s amended and restated certificate of incorporation filed on June 21, 2010 in connection with the closing of the initial public offering of the Company's common stock (the "IPO"), 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.

Stockbased_Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2013
Text Block [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, restricted stock units (“RSUs”) and stock appreciation rights. In June 2010, in connection with the IPO, 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 10 years, except that certain stock-based grants made after 2005 have a term of five years. The requisite vesting period for grants made under the 2009 Plan is typically four years. On January 1, 2012 and 2013, 1,219,787 and 1,250,000 shares, respectively, were added to the 2009 Plan. At December 31, 2013, the Company had 118,663 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,
		2013			2012			2011
	Stock options	$	8,644		$	6,512		$	2,394
	Restricted stock units	28,020			8,388			4,807
	Performance stock units	5,020			122			—
	Total recognized stock-based compensation expense	$	41,684		$	15,022		$	7,201
	Stock Options
	The following table presents a summary related to stock options for the following periods:
		Number of		Weighted			Weighted		Aggregate
		Options		Average			Average		Intrinsic
		Outstanding		Exercise			Remaining		Value
				Price			Contractual
							Term (years)
									(in thousands)
	Balance, December 31, 2012	1,474,346		$	23.5
	Granted	560,905		33.01
	Exercised	(201,448	)	6.35
	Canceled, expired or forfeited	(87,734	)	32.45
	Balance, December 31, 2013	1,746,069		$	28.09		8.06		$	10,042
	Vested at December 31, 2013	715,075		$	19.85		6.82		$	8,880
	Exercisable at December 31, 2013	715,075		$	19.85		6.82		$	8,880
	In 2013, 2012 and 2011, the Company granted stock options with a weighted-average grant date fair value of $18.09, $20.14 and $21.86, respectively. The intrinsic value of stock options exercised in 2013, 2012 and 2011 was $5.0 million, $22.3 million and $59.3 million, respectively, and cash received from stock options exercised was $1.3 million, $2.5 million and $3.9 million, respectively.
	At December 31, 2013, unrecognized stock-based compensation expense, net of estimated forfeitures, relating to unvested stock options was $9.5 million which amount is scheduled to be recognized as stock-based compensation expense over a weighted average period of 1.4 years. To the extent the actual forfeiture rate is different than what the Company has anticipated at December 31, 2013, 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		Weighted
		RSUs		Average Grant
				Date Fair Value
	Balance, December 31, 2012	638,299		$	34.25
	Granted	1,518,023		32.59
	Vested	(287,683	)	32.72
	Forfeited	(76,806	)	32.54
	Balance, December 31, 2013	1,791,833		$	33.16
	During 2013, the Company granted 1,510,176 RSUs to certain officers and employees, which vest over three or four years following the vesting commencement date, and granted 7,847 RSUs to certain directors that vest quarterly through December 31, 2013. At December 31, 2013, unrecognized stock-based compensation expense related to unvested RSUs was $24.5 million, which is scheduled to be recognized over a weighted average period of 1.32 years.
	During 2012, the Company granted 352,600 RSUs to certain officers and employees, which vest over four years following the date of grant, 128,309 RSUs to certain employees that vest over three years following the date of grant and 4,925 RSUs to certain employees that vest over two years following the date of grant. During 2011, the Company granted 211,450 RSUs to certain officers and employees that vest over four years following the date of grant.
	Performance Stock Units
	The following table presents a summary of activity for PSUs:
		Number of		Weighted Average Grant Date Fair Value
		PSUs
	Balance, December 31, 2012	10,000		$	39.86
	Granted	382,500		28.72
	Vested	(10,000	)	39.86
	Forfeited	—		—
	Balance, December 31, 2013	382,500		$	28.72
	During 2013, the Company granted 382,500 PSUs to certain officers, which vest over 4 years, subject to the satisfaction of performance conditions based upon the trading price of the Company's common stock. To date, the trading price of our common stock has not met any of the thresholds necessary to satisfy any of the performance conditions of these awards. During 2012, the Company granted 55,000 PSUs to certain officers subject to the recipients’ satisfying the performance criteria of the awards, of which 10,000 PSUs met the criteria and vested on December 31, 2013. At December 31, 2013, unrecognized stock-based compensation expense related to unvested PSUs was $4.3 million, which is scheduled to be recognized over a weighted average period of 1.34 years .
	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, 2013, the Company’s APIC pool balance was $7.3 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. For 2011, there was a reduction to the deferred tax asset related to tax benefits of employee stock option grants of $0.1 million related to forfeitures and exercises that resulted in a tax deduction less than previously recorded benefits based on the option value at the time of grant (shortfalls). 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, 2013 and 2012 are $63.6 million and $77.6 million, respectively.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Leases
	The Company leases office space under non-cancelable operating leases with various expiration dates through 2022. Rent expense was approximately $3.2 million, $2.7 million and $2.1 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	The following table presents future minimum lease payments under the non-cancelable operating leases (in thousands):
		Operating
		Leases
	Years Ending December 31:
	2014	$	2,816
	2015	2,533
	2016	2,533
	2017	2,400
	2018 and thereafter	3,433
	Total future minimum lease payments	$	13,715
	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_Informa

Segment and Geographic Information	12 Months Ended
	Dec. 31, 2013
Text Block [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,
		2013		2012		2011
	Revenues:
	United States	$	100,857	$	94,781	$	75,748
	EMEA	44,235		39,334		24,866
	APAC	20,990		17,994		25,332
	Other	12,411		12,733		12,118
	Total Revenue	$	178,493	$	164,842	$	138,064
		December 31,		December 31,
		2013		2012
	Long-Lived Assets, net
	United States	$	33,234	$	19,676
	EMEA	1,412		615
	APAC	497		158
	Other	488		451
	Total Long-Lived Assets, net	$	35,631	$	20,900

401k_Defined_Contribution_Plan

401(k) Defined Contribution Plan	12 Months Ended
	Dec. 31, 2013
Text Block [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, 2013 and 2012 were $1.8 million and $1.2 million, respectively.

Quarterly_Financial_Data_Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Quarterly Financial Data (Unaudited)	'
	Quarterly Financial Data (Unaudited) (in thousands, except per share data):
		March 31,			June 30,			September 30,			December 31,
		2013			2013			2013			2013
	Total revenue	$	39,625		$	44,009		$	42,900		$	51,959
	Gross profit	29,859			34,238			32,365			40,651
	(Loss) income from operations	(3,757		)	(2,311		)	(2,989		)	1,720
	Net (loss) income	(2,317		)	(3,015		)	(4,054		)	512
	Net (loss) income per share:
	Basic	(0.08		)	(0.11		)	(0.14		)	0.02
	Diluted	(0.08		)	(0.11		)	(0.14		)	0.02
		March 31,			June 30,			September 30,			December 31,
		2012			2012			2012			2012
	Total revenue	$	38,343		$	40,516		$	40,174		$	45,809
	Gross profit	30,271			32,195			32,449			37,441
	Income from operations	4,909			5,576			6,476			8,443
	Net income	1,701			2,356			3,140			4,879
	Net income per share:
	Basic	0.06			0.09			0.11			0.18
	Diluted	0.06			0.08			0.11			0.17

Schedule_IIConsolidated_Valuat

Schedule II-Consolidated Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Schedule II-Consolidated Valuation and Qualifying Accounts	'
	SCHEDULE II—CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS
	(In thousands)
		Balance at	Amounts		Deductions		Additions	Balance at
		Beginning	Charged to		-2		Acquired from	End of Year
		of Year	Operations				Business
			-1				Combinations
	Allowance for doubtful accounts:
	Year Ended December 31, 2011	38	56		(40	)	—	54
	Year Ended December 31, 2012	54	718		(633	)	—	139
	Year Ended December 31, 2013	139	149		(160	)		128
	Allowance for deferred tax assets:
	Year Ended December 31, 2011	33,499	(8,946	)	(22,979	)	2,131	3,705
	Year Ended December 31, 2012	3,705	1,853		—		—	5,558
	Year Ended December 31, 2013	5,558	—		(2,261	)	—	3,297
	_______________________
	-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 NOL’s against the valuation allowance.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Text Block [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.
Revision of Prior Period Amounts	'
	Revision of Prior Period Amounts
	The Company revised the presentation of excess tax benefit related to share based compensation in the statement of cash flows for the years ended December 31, 2012 and 2011. This item was previously reflected as a cash inflow from operating activities rather than financing activities. The revision decreased cash flows from operating activities and increased cash flows from financing activities by $0.6 million and $0.1 million for the years ended December 31, 2012 and 2011, respectively. There was no impact on cash and cash equivalents. The Company concluded that the correction was immaterial to all prior annual and quarterly periods.
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. The Company had long-term restricted cash of $0.6 million at December 31, 2013 and 2012.
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	'
	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 other-than-temporarily impaired.
	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.
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 results of the Company’s annual goodwill impairment testing, there was no indication of impairment as of December 31, 2013, 2012 or 2011. (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, 2013, 2012 or 2011. (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
	Non-compete agreement	1 year
	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. Assets to be disposed of are recorded at the lower of the carrying amount or fair value less costs to sell. 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.
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, professional services and subscription and usage fees related to the cloud offering. 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 less than 1% 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 the 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 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 and is generally recognized as services are performed. 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, 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 in which 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 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) intangible asset amortization expense related to acquired technology.
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 and stock-based compensation expense. The Company has a valuation allowance of approximately $3.3 million against its net deferred tax assets in certain foreign jurisdictions. 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 the grant is measured based on the estimated fair value of the stock award at the date of the grant, using a binomial options pricing model, or binomial lattice model. 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 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.
	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 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 (Loss) Income Per Common Share	'
	Net (Loss) Income Per Common Share
	Basic net (loss) 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, restricted stock units ("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, we only include the impact of the premium feature in our 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, 2013, 2012 or 2011.
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.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Summary of Long-Term Investments	'
	The following table summarizes the Company's investments:
		December 31, 2013						December 31, 2012
		Contracted		Carrying				Contracted		Carrying
		Maturity		Value				Maturity		Value
				(in thousands)						(in thousands)
	Money market funds	demand		$	48,256			demand		$	63,189
	Total cash equivalents			$	48,256					$	63,189
	U.S. agency notes	2 - 329 days		$	35,534			17 - 304 days		$	25,632
	Commercial paper	7 - 31 days		4,999				3 - 214 days		27,489
	Corporate bonds	10 - 325 days		53,131				31 - 227 days		19,954
	Total short-term investments			$	93,664					$	73,075
	U.S. agency notes	386 - 605 days		$	15,006			399 - 610 days		$	18,135
	Corporate bonds	407 - 472 days		8,334				389 - 560 days		11,967
	Total long-term investments			$	23,340					$	30,102
Schedule of Unrealized Loss on Investments	'
	The following table summarizes the Company's investments at December 31, 2013 (in thousands):
		Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
	U.S. agency notes	$	50,533			$	18			$	(11	)		$	50,540
	Commercial paper	4,999				—				—				4,999
	Corporate bonds	61,448				41				(24		)		61,465
	Total investments	$	116,980			$	59			$	(35	)		$	117,004
	The following table summarizes the Company's investments at December 31, 2012 (in thousands):
		Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
	U.S. agency notes	$	43,750			$	17			$	—			$	43,767
	Commercial paper	27,487				2				—				27,489
	Corporate bonds	31,921				11				(11		)		31,921
	Total investments	$	103,158			$	30			$	(11	)		$	103,177
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, 2013								December 31, 2012
		Carrying				Fair Value				Carrying				Fair Value
		Value								Value
	Assets
	Cash equivalents and certificates of deposit *	$	48,837			$	48,837			$	63,795			$	63,795
	Short and long-term investments	117,004				117,004				103,177				103,177
	Total assets	$	165,841			$	165,841			$	166,972			$	166,972
	*	Includes $0.6 million of restricted cash as of December 31, 2013 and 2012 and excludes $21.6 million and $27.4 million of operating cash balances as of December 31, 2013 and 2012, 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
		2013
	Money market funds	$	48,256			$	48,256			$	—			$	—
	Certificates of deposit	581				581				—				—
	Total cash equivalents and certificates of deposit *	48,837				48,837				—				—
	U.S. agency notes	50,540				—				50,540				—
	Commercial paper	4,999				—				4,999				—
	Corporate bonds	61,465				—				61,465				—
	Total investments	117,004				—				117,004				—
	Total cash equivalents, certificates of deposit and investments	$	165,841			$	48,837			$	117,004			$	—
		December 31,				Level 1				Level 2				Level 3
		2012
	Money market funds	$	63,189			$	63,189			$	—			$	—
	Certificates of deposit	606				606				—				—
	Total cash equivalents and certificates of deposit *	63,795				63,795				—				—
	U.S. agency notes	43,767				—				43,767				—
	Commercial paper	27,489				—				27,489				—
	Corporate bonds	31,921				—				31,921				—
	Total investments	103,177				—				103,177				—
	Total cash equivalents, certificates of deposit and investments	$	166,972			$	63,795			$	103,177			$	—
	*	Includes $0.6 million of restricted cash as of December 31, 2013 and 2012 and excludes $21.6 million and $27.4 million of operating cash balances as of December 31, 2013 and 2012, respectively.
Customers Represented Percentage of Revenue or Accounts Receivable	'
	The following customers represented 10% or more of revenue or accounts receivable:
		Year Ended December 31,							December 31,
		2013		2012		2011			2013			2012
		Revenue							Accounts Receivable
	Company A	*		*		11	%		13	%		16	%
	*	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
	Non-compete agreement	1 year
	Tradenames	1 - 7 years
Deferred Revenue	'
	Deferred revenue consists of the following (in thousands):
		December 31,				December 31,
		2013				2012
	License software	$	20,149			$	18,375
	Subscription and maintenance support	46,975				35,701
	Professional services and other	10,538				7,073
	Total	$	77,662			$	61,149
	Current portion	$	71,258			$	49,368
	Non-current portion	6,404				11,781
	Total	$	77,662			$	61,149
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,
		2013			2012			2011
	Average assumptions:
	Risk-free interest rate	1.5	%		1	%		1.5	%
	Expected dividend yield	—	%		—	%		—	%
	Expected volatility	56	%		57	%		58	%
	Expected term (years)	7.5 years			7.5 years			7.6 years
Net Income (Loss) Per Common Share	'
	In the table below, net (loss) income represents the numerator and weighted average common shares outstanding represents the denominator:
		Year Ended December 31,
		2013				2012				2011
		(in thousands, except per share data)
	Net (loss) income	$	(8,874	)		$	12,076			$	32,297
	Weighted average basic common shares outstanding	28,116				27,581				26,603
	Dilutive effect of stock-based awards	—				772				1,384
	Weighted average diluted common shares outstanding	28,116				28,353				27,987
	(Loss) earnings per share:
	Basic	$	(0.32	)		$	0.44			$	1.21
	Diluted	$	(0.32	)		$	0.43			$	1.15

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [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 August 6, 2012 (in thousands):
	Accounts receivable	$	19
	Prepaid expenses and other assets	110
	Property and equipment	239
	Trade name	140
	Customer relationships	200
	Developed technology	4,700
	Goodwill	16,747
	Accounts payable and accrued expenses	(155		)
	Total consideration	$	22,000
	The following table summarizes the estimated 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 estimated fair value of the assets acquired and liabilities assumed at the acquisition date of December 16, 2013 (in thousands):
	Accounts receivable	243
	Other current 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 October 21, 2011 (in thousands):
	Cash and cash equivalents	$	83
	Customer relationships	220
	Developed technology	1,718
	Goodwill	5,250
	Accounts payable and accrued expenses	(302		)
	Debt	(1,009		)
	Total consideration	$	5,960
	The following table summarizes the fair value of the assets acquired and liabilities assumed at the acquisition date of September 30, 2011 (in thousands):
	Cash and cash equivalents	$	320
	Accounts receivable	504
	Prepaid expenses and other assets	54
	Property and equipment	34
	Trade name	1,400
	Customer relationships	100
	Developed technology	3,100
	Goodwill	4,895
	Deferred tax asset	2,629
	Accounts payable and accrued expenses	(830		)
	Deferred revenue	(1,098		)
	Total consideration	$	11,108
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,
		2013			2012
		(In thousands except per share data)
	Revenue	$	184,383		$	173,576
	Net (loss) income	(9,347		)	7,776
	Net (loss) income per common share, basic	$	(0.33	)	$	0.28
	Net (loss) income per common share, diluted	$	(0.33	)	$	0.27

Goodwill_and_Intangibles_Table

Goodwill and Intangibles (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [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 as of December 31, 2011	$	17,276
	Increase in goodwill related to acquisitions	19,924
	Other	329
	Balance as of December 31, 2012	37,529
	Increase in goodwill related to acquisitions	26,106
	Other	1,557
	Balance as of December 31, 2013	$	65,192
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):
		31-Dec-13						31-Dec-12
		Gross		Accumulated		Net		Gross		Accumulated		Net
		Carrying		Amortization		Amount		Carrying		Amortization		Amount
		Amount						Amount
	Customer relationships	$	14,698	$	3,362	$	11,336	$	5,255	$	2,765	$	2,490
	Developed technology	12,948		4,433		8,515		11,218		2,643		8,575
	Non-compete agreement	—		—		—		111		111		—
	Trade name	874		335		539		369		187		182
	Total	$	28,520	$	8,130	$	20,390	$	16,953	$	5,706	$	11,247
Schedule of Future Expected Amortization Expense on Intangible Assets	'
	As of December 31, 2013, future amortization expense on intangible assets is expected to be as follows (in thousands):
	2014	$	5,333
	2015	4,729
	2016	3,453
	2017	2,338
	2018	1,763
	2019 and thereafter	2,774
	Total amortization expense	$	20,390

Property_and_Equipment_Tables

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Schedule of Property and Equipment at Cost	'
	Property and equipment consists of the following (in thousands):
		December 31,
		2013			2012
	Equipment	$	13,421		$	9,607
	Software	5,256			3,346
	Furniture and fixtures	1,098			783
	Leasehold improvements	3,383			3,167
		23,158			16,903
	Less accumulated depreciation and amortization	(13,048		)	(9,542		)
	Property and equipment, net	$	10,110		$	7,361

Accounts_payable_and_other_cur1

Accounts payable and other current liabilities (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Schedule of Accounts Payable and Other Current Liabilities	'
	Accounts payable and other current liabilities consist of the following (in thousands):
		December 31,
		2013		2012
	Accounts payable and accrued expenses	$	5,744	$	7,237
	Accrued compensation	6,651		6,371
	Other	2,562		2,078
		$	14,957	$	15,686

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [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,
		2013			2012			2011
	(Loss) income before income taxes:
	United States	$	(15,226	)	$	23,429		$	25,178
	Foreign	943			(4,495		)	(1,056		)
	(Loss) income before income taxes	$	(14,283	)	$	18,934		$	24,122
	Provision for (benefit from) income taxes:
	Current:
	Federal and state	$	7,718		$	407		$	4
	Foreign	1,423			(1,355		)	760
	Total current	$	9,141		$	(948	)	$	764
	Deferred:
	Federal and state	$	(15,240	)	$	8,068		$	(8,946	)
	Foreign	690			(262		)	7
	Total deferred	$	(14,550	)	$	7,806		$	(8,939	)
	Provision for (benefit from) income taxes	$	(5,409	)	$	6,858		$	(8,175	)
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,
		2013			2012
	Deferred tax assets:
	Net operating loss carry-forward	$	5,993		$	9,140
	Deferred revenue	5,694			3,616
	Depreciation and amortization	986			704
	Research tax credit carry-forward	1,291			2,467
	Accrued expenses	2,009			1,637
	Stock based compensation	16,129			5,370
	Other	4,110			880
	Total deferred tax assets	$	36,212		$	23,814
	Valuation allowance	(3,297		)	(5,558		)
	Net deferred tax assets	$	32,915		$	18,256
	Deferred tax liabilities
	Acquired intangibles	$	(4,381	)	$	(1,568	)
	Convertible debt discount	(10,913		)	(12,082		)
	Other	(71		)	(244		)
	Total deferred tax liabilities	$	(15,365	)	$	(13,894	)
	Net deferred tax assets	$	17,550		$	4,362
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,
		2013			2012			2011
	Tax provision based on federal statutory rate	$	(4,999	)	$	6,437		$	8,210
	State taxes	617			723			947
	Foreign rate differential	(157		)	104			(54		)
	Permanent items	1,503			67			460
	Stock based compensation	(147		)	938			478
	Change in income tax valuation allowance	333			1,756			(16,388		)
	Business tax credits	(1,829		)	(3,258		)	(1,204		)
	Other	(730		)	91			(624		)
	Provision for (benefit from) income taxes	$	(5,409	)	$	6,858		$	(8,175	)
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,
		2013			2012			2011
	Unrecognized tax benefits balance at January 1,	$	821		$	625		$	618
	Additions for tax positions of prior years	4,054			196			77
	Settlements of tax positions of prior years	—			—			(70		)
	Unrecognized tax benefits balance at December 31,	$	4,875		$	821		$	625

Borrowings_Tables

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Summary of Company's Financial Statements	'
	The following table shows the amounts recorded within the Company’s financial statements with respect to the Notes (in thousands):
		December 31,			December 31,
		2013			2012
	Convertible debt principal	$	120,000		$	120,000
	Unamortized debt discount	(28,451		)	(33,549		)
	Net carrying amount of convertible debt	$	91,549		$	86,451
Summary of Interest Expense Recognized	'
	The following table presents the interest expense recognized related to the Notes (in thousands):
		Year ended
		December 31,
		2013			2012
	Contractual interest expense	$	1,800		$	1,800
	Amortization of debt issuance costs	406			406
	Accretion of debt discount	5,098			4,714
	Net interest expense	$	7,304		$	6,920
Aggregate Maturities of Borrowings	'
	The aggregate maturities of borrowings as of December 31, 2013 were as follows (in thousands):
	2013 - 2016	$	—
	2017 and thereafter, and thereafter	120,000
		$	120,000

Stockbased_Compensation_Tables

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [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,
		2013			2012			2011
	Stock options	$	8,644		$	6,512		$	2,394
	Restricted stock units	28,020			8,388			4,807
	Performance stock units	5,020			122			—
	Total recognized stock-based compensation expense	$	41,684		$	15,022		$	7,201
Summary of Information Related to Stock Options	'
	The following table presents a summary related to stock options for the following periods:
		Number of		Weighted			Weighted		Aggregate
		Options		Average			Average		Intrinsic
		Outstanding		Exercise			Remaining		Value
				Price			Contractual
							Term (years)
									(in thousands)
	Balance, December 31, 2012	1,474,346		$	23.5
	Granted	560,905		33.01
	Exercised	(201,448	)	6.35
	Canceled, expired or forfeited	(87,734	)	32.45
	Balance, December 31, 2013	1,746,069		$	28.09		8.06		$	10,042
	Vested at December 31, 2013	715,075		$	19.85		6.82		$	8,880
	Exercisable at December 31, 2013	715,075		$	19.85		6.82		$	8,880
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		Weighted
		RSUs		Average Grant
				Date Fair Value
	Balance, December 31, 2012	638,299		$	34.25
	Granted	1,518,023		32.59
	Vested	(287,683	)	32.72
	Forfeited	(76,806	)	32.54
	Balance, December 31, 2013	1,791,833		$	33.16
Schedule Of Share Based Compensation Performance Stock Units Award Activity	'
	The following table presents a summary of activity for PSUs:
		Number of		Weighted Average Grant Date Fair Value
		PSUs
	Balance, December 31, 2012	10,000		$	39.86
	Granted	382,500		28.72
	Vested	(10,000	)	39.86
	Forfeited	—		—
	Balance, December 31, 2013	382,500		$	28.72

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [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:
	2014	$	2,816
	2015	2,533
	2016	2,533
	2017	2,400
	2018 and thereafter	3,433
	Total future minimum lease payments	$	13,715

Segment_and_Geographic_Informa1

Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [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,
		2013		2012		2011
	Revenues:
	United States	$	100,857	$	94,781	$	75,748
	EMEA	44,235		39,334		24,866
	APAC	20,990		17,994		25,332
	Other	12,411		12,733		12,118
	Total Revenue	$	178,493	$	164,842	$	138,064
		December 31,		December 31,
		2013		2012
	Long-Lived Assets, net
	United States	$	33,234	$	19,676
	EMEA	1,412		615
	APAC	497		158
	Other	488		451
	Total Long-Lived Assets, net	$	35,631	$	20,900

Quarterly_Financial_Data_Unaud1

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [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,
		2013			2013			2013			2013
	Total revenue	$	39,625		$	44,009		$	42,900		$	51,959
	Gross profit	29,859			34,238			32,365			40,651
	(Loss) income from operations	(3,757		)	(2,311		)	(2,989		)	1,720
	Net (loss) income	(2,317		)	(3,015		)	(4,054		)	512
	Net (loss) income per share:
	Basic	(0.08		)	(0.11		)	(0.14		)	0.02
	Diluted	(0.08		)	(0.11		)	(0.14		)	0.02
		March 31,			June 30,			September 30,			December 31,
		2012			2012			2012			2012
	Total revenue	$	38,343		$	40,516		$	40,174		$	45,809
	Gross profit	30,271			32,195			32,449			37,441
	Income from operations	4,909			5,576			6,476			8,443
	Net income	1,701			2,356			3,140			4,879
	Net income per share:
	Basic	0.06			0.09			0.11			0.18
	Diluted	0.06			0.08			0.11			0.17

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Reporting_Unit
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Cash flow from operating activities	($31,934,000)	($30,019,000)	($28,514,000)
Cash flow from financing activities	4,831,000	458,000	117,492,000
Maturity of liquid instruments	'Three months or less	'	'
Restricted cash, noncurrent	581,000	584,000	'
Number of reporting units	1	'	'
Warranty period for Company's licensed software (in days)	'90 days	'	'
Capitalized in internal-use software	1,100,000	300,000	'
Valuation allowance	3,297,000	5,558,000	'
Percentage of tax benefit	50.00%	'	'
Description of tax benefit	'Greater than 50%	'	'
Amortization of software development cost	200,000	0	0
Maximum	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Percentage of revenue on shipping and handling	1.00%	'	'
Recognition period for current portion of deferred revenue (in months)	'12 months	'	'
Reclassification Adjustment	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Cash flow from operating activities	'	600,000	100,000
Cash flow from financing activities	'	$600,000	$1,100,000

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Summary of Long-Term Investments (Detail) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

In Thousands, unless otherwise specified

Money market funds

Money market funds

U.S. agency notes

U.S. agency notes

Commercial paper

Commercial paper

Corporate bonds

Corporate bonds

Minimum

Minimum

Minimum

Minimum

Minimum

Minimum

Maximum

Maximum

Maximum

Maximum

Maximum

Maximum

U.S. agency notes

U.S. agency notes

Commercial paper

Commercial paper

Corporate bonds

Corporate bonds

U.S. agency notes

U.S. agency notes

Commercial paper

Commercial paper

Corporate bonds

Corporate bonds

Schedule Of Investments In Marketable Securities [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Contracted maturity of cash equivalents

'

'

'

'

'demand

'demand

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Contracted maturity of short term investments

'

'

'

'

'

'

'2 - 329 days

'17 - 304 days

'7 - 31 days

'3 - 214 days

'10 - 325 days

'31 - 227 days

'

'

'

'

'

'

'

'

'

'

'

'

Contracted maturity of long term investments

'

'

'

'

'

'

'386 - 605 days

'399 - 610 days

'

'

'407 - 472 days

'389 - 560 days

'

'

'

'

'

'

'

'

'

'

'

'

Total cash equivalents, Carrying Value

$69,866

$90,545

$94,072

$47,254

$48,256

$63,189

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total short-term investments, Carrying Value

93,664

73,075

'

'

'

'

35,534

25,632

4,999

27,489

53,131

19,954

'

'

'

'

'

'

'

'

'

'

'

'

Short Term Investment Maturity Term Maximum

'

'

'

'

'

'

'

'

'

'

'

'

'2 days

'17 days

'7 days

'3 days

'10 days

'31 days

'239 days

'304 days

'31 days

'214 days

'325 days

'227 days

Total long-term investments, Carrying Value

$23,340

$30,102

'

'

'

'

$15,006

$18,135

'

'

$8,334

$11,967

'

'

'

'

'

'

'

'

'

'

'

'

Contracted Maturity Long Term Investments

'

'

'

'

'

'

'

'

'

'

'

'

'386 days

'399 days

'

'

'407 days

'389 days

'605 days

'610 days

'

'

'472 days

'560 days

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Investments, Cost vs. Fair Value (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule Of Investments In Marketable Securities [Line Items]	'	'
Cost	$116,980	$103,158
Gross Unrealized Gains	59	30
Gross Unrealized Losses	-35	-11
Fair Value	117,004	103,177
U.S. agency notes	'	'
Schedule Of Investments In Marketable Securities [Line Items]	'	'
Cost	50,533	43,750
Gross Unrealized Gains	18	17
Gross Unrealized Losses	-11	0
Fair Value	50,540	43,767
Commercial paper	'	'
Schedule Of Investments In Marketable Securities [Line Items]	'	'
Cost	4,999	27,487
Gross Unrealized Gains	0	2
Gross Unrealized Losses	0	0
Fair Value	4,999	27,489
Corporate bonds	'	'
Schedule Of Investments In Marketable Securities [Line Items]	'	'
Cost	61,448	31,921
Gross Unrealized Gains	41	11
Gross Unrealized Losses	-24	-11
Fair Value	$61,465	$31,921

Summary_of_Significant_Account6

Summary of Significant Accounting Policies - Summary of Carrying and Fair Value of Company's Financial Assets (Detail) (USD $)	Dec. 31, 2013		Dec. 31, 2012
Disclosure Summary Of Significant Accounting Policies Summary Of Carrying And Fair Value Of Companys Financial Assets [Abstract]	'		'
Cash equivalents and certificates of deposit, Carrying Value	$48,837,000	[1]	$63,795,000	[1]
Short and long-term investments, Carrying Value	117,004,000		103,177,000
Total assets, Carrying Value	165,841,000		166,972,000
Cash equivalents and certificates of deposit, Fair Value	48,837,000	[1]	63,795,000	[1]
Short and long-term investments, Fair Value	117,004,000		103,177,000
Total cash equivalents, certificates of deposit and investments	165,841,000		166,972,000
Restricted cash	600,000		600,000
Cash equivalents and certificates of deposit not included in operating cash	$21,600,000		$27,400,000
[1]	Includes $0.6 million of restricted cash as of December 31, 2013 and 2012 and excludes $21.6 million and $27.4 million of operating cash balances as of December 31, 2013 and 2012, respectively.

Summary_of_Significant_Account7

Summary of Significant Accounting Policies - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Dec. 31, 2013		Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total cash equivalents and certificates of deposit	$48,837,000	[1]	$63,795,000	[1]
Total investments	117,004,000		103,177,000
Total cash equivalents, certificates of deposit and investments	165,841,000		166,972,000
Restricted cash	600,000		600,000
Cash equivalents and certificates of deposit not included in operating cash	21,600,000		27,400,000
Fair Value, Measurements, Recurring	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total cash equivalents and certificates of deposit	48,837,000	[1]	63,795,000	[1]
Total investments	117,004,000		103,177,000
Total cash equivalents, certificates of deposit and investments	165,841,000		166,972,000
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	48,256,000		63,189,000
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	581,000		606,000
Fair Value, Measurements, Recurring | U.S. agency notes	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total investments	50,540,000		43,767,000
Fair Value, Measurements, Recurring | Commercial paper	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total investments	4,999,000		27,489,000
Fair Value, Measurements, Recurring | Corporate bonds	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total investments	61,465,000		31,921,000
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	48,837,000	[1]	63,795,000	[1]
Total investments	0		0
Total cash equivalents, certificates of deposit and investments	48,837,000		63,795,000
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	48,256,000		63,189,000
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	581,000		606,000
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 | Commercial paper	'		'
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	[1]	0	[1]
Total investments	117,004,000		103,177,000
Total cash equivalents, certificates of deposit and investments	117,004,000		103,177,000
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		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	50,540,000		43,767,000
Level 2 | Fair Value, Measurements, Recurring | Commercial paper	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total investments	4,999,000		27,489,000
Level 2 | Fair Value, Measurements, Recurring | Corporate bonds	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Total investments	61,465,000		31,921,000
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	[1]	0	[1]
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		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 | Commercial paper	'		'
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
[1]	Includes $0.6 million of restricted cash as of December 31, 2013 and 2012 and excludes $21.6 million and $27.4 million of operating cash balances as of December 31, 2013 and 2012, respectively.

Summary_of_Significant_Account8

Summary of Significant Accounting Policies - Customers Represented Percentage of Revenue or Accounts Receivable (Detail)	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2013		Dec. 31, 2012
Concentration Risk [Line Items]	'		'		'
Percentage of revenue or accounts receivable	'		10.00%		10.00%
Company A	'		'		'
Concentration Risk [Line Items]	'		'		'
Customers represented percentage of revenue	11.00%	[1]	'		'
Customers represented percentage of accounts receivable	'		13.00%	[1]	16.00%	[1]
[1]	Represented less than 10%

Summary_of_Significant_Account9

Summary of Significant Accounting Policies - Estimated Useful Lives of Related Assets (Detail)	12 Months Ended
	Dec. 31, 2013
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

Recovered_Sheet1

Summary of Significant Accounting Policies - Estimated Useful Lives Used in Computing Amortization (Detail)	12 Months Ended
	Dec. 31, 2013
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
Non-compete agreement	'
Finite-Lived Intangible Assets [Line Items]	'
Estimated useful lives used in computing amortization (in years)	'1 year
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

Recovered_Sheet2

Summary of Significant Accounting Policies - Deferred Revenue (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue	$77,662	$61,149
Deferred revenue, current portion	71,258	49,368
Deferred revenue, Non-current portion	6,404	11,781
License software	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue	20,149	18,375
Subscription and maintenance support	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue	46,975	35,701
Professional services and other	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue	$10,538	$7,073

Recovered_Sheet3

Summary of Significant Accounting Policies - Fair Value of Stock Options Estimated at Weighted Average Assumptions (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Average assumptions:	'	'	'
Risk-free interest rate (as a percent)	1.50%	1.00%	1.50%
Expected dividend yield (as a percent)	0.00%	0.00%	0.00%
Expected volatility (as a percent)	56.00%	57.00%	58.00%
Expected term (years)	'7 years 6 months	'7 years 6 months	'7 years 7 months 6 days

Recovered_Sheet4

Summary of Significant Accounting Policies - Net (Loss) Income Per Common Share (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net (loss) income	'	'	'	'	'	'	'	'	($8,874)	$12,076	$32,297
Weighted average basic common shares outstanding	'	'	'	'	'	'	'	'	28,116,000	27,581,000	26,603,000
Dilutive effect of stock-based awards	'	'	'	'	'	'	'	'	0	772,000	1,384,000
Weighted average diluted common shares outstanding	'	'	'	'	'	'	'	'	28,116,000	28,353,000	27,987,000
(Loss) earnings per share:	'	'	'	'	'	'	'	'	'	'	'
Basic	$0.02	($0.14)	($0.11)	($0.08)	$0.18	$0.11	$0.09	$0.06	($0.32)	$0.44	$1.21
Diluted	$0.02	($0.14)	($0.11)	($0.08)	$0.17	$0.11	$0.08	$0.06	($0.32)	$0.43	$1.15
Weighted average effect of potentially dilutive securities excluded contribution (in shares)	'	'	'	'	'	'	'	'	1,927,664	575,327	96,932
Stock options	'	'	'	'	'	'	'	'	'	'	'
(Loss) earnings per share:	'	'	'	'	'	'	'	'	'	'	'
Weighted average effect of potentially dilutive securities excluded contribution (in shares)	'	944,499	'	'	'	'	'	'	'	'	'

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)

12 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 16, 2013

Dec. 16, 2013

Dec. 16, 2013

Dec. 16, 2013

Aug. 12, 2013

Aug. 12, 2013

Aug. 12, 2013

Aug. 12, 2013

Aug. 06, 2012

Aug. 06, 2012

Aug. 06, 2012

Aug. 06, 2012

Oct. 21, 2011

Oct. 21, 2011

Oct. 21, 2011

Sep. 30, 2011

Sep. 30, 2011

Sep. 30, 2011

Sep. 30, 2011

Sep. 30, 2011

Finocom AG

Finocom AG

Finocom AG

Finocom AG

Hosted IP Communications (Europe) Ltd.

Hosted IP Communications (Europe) Ltd.

Hosted IP Communications (Europe) Ltd.

Hosted IP Communications (Europe) Ltd.

Adaption Technologies Ventures, Ltd.

Adaption Technologies Ventures, Ltd.

Adaption Technologies Ventures, Ltd.

Adaption Technologies Ventures, Ltd.

Movial

Movial

Movial

iLinc

iLinc

iLinc

iLinc

iLinc

Customer relationships

Tradenames

Developed technology

Customer relationships

Tradenames

Developed technology

Customer relationships

Tradenames

Developed technology

Customer relationships

Developed technology

Customer relationships

Tradenames

Developed technology

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchase price

'

'

$9,700,000

'

'

'

$26,300,000

'

'

'

$22,000,000

'

'

'

$6,000,000

'

'

$11,100,000

'

'

'

'

Consideration paid

'

'

500,000

'

'

'

500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transaction costs of acquisitions

'

'

'

'

'

'

'

'

'

'

400,000

'

'

'

700,000

'

'

400,000

400,000

'

'

'

Percentage of discount on expenses

'

'

'

'

'

'

'

'

'

'

13.00%

'

'

'

15.00%

'

'

11.50%

'

'

'

'

Weighted-average amortization period for amortizable intangible assets (in years)

'

'

'7 years

'8 years

'7 years

'5 years

'6 years

'7 years

'1 year

'2 years

'4 years

'3 years

'2 years

'5 years

'5 years

'

'

'

'4 years

'4 years

'3 years

'5 years

Goodwill

65,192,000

37,529,000

5,686,000

'

'

'

18,280,000

'

'

'

16,747,000

'

'

'

5,250,000

'

'

4,895,000

4,895,000

'

'

'

Amortization on a straight line basis (in years)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'3 years

'5 years

'

'

'

'

'

Aggregate revenue of business acquisition

2,800,000

1,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate net losses of business acquisition

$300,000

$200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquisitions_Estimated_Fair_Va

Acquisitions - Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Aug. 12, 2013	Dec. 16, 2013	Aug. 06, 2012	Oct. 21, 2011	Sep. 30, 2011
In Thousands, unless otherwise specified			Hosted IP Communications (Europe) Ltd.	Finocom AG	Adaption Technologies Ventures, Ltd.	Movial	iLinc
Business Acquisition [Line Items]	'	'	'	'	'	'	'
Cash and cash equivalents	'	'	$215	'	'	$83	$320
Other current assets	'	'	289	7	'	'	'
Deferred tax asset	'	'	'	1,080	'	'	2,629
Accounts receivable	'	'	1,187	243	19	'	504
Prepaid expenses and other assets	'	'	'	'	110	'	54
Property and equipment	'	'	311	64	239	'	34
Trade name	'	'	310	275	140	'	1,400
Customer relationships	'	'	7,128	2,610	200	220	100
Developed technology	'	'	465	1,236	4,700	1,718	3,100
Goodwill	65,192	37,529	18,280	5,686	16,747	5,250	4,895
Deferred tax liability	'	'	-966	-1,322	'	'	'
Accounts payable and accrued expenses	'	'	-876	-199	-155	-302	-830
Deferred revenue	'	'	'	'	'	'	-1,098
Debt	'	'	'	'	'	-1,009	'
Total consideration	'	'	$26,343	$9,680	$22,000	$5,960	$11,108

Acquisitions_Schedule_of_Pro_F

Acquisitions - Schedule of Pro Forma Information of Acquisitions (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Disclosure Acquisitions Schedule Of Pro Forma Information Of Acquisitions [Abstract]	'	'
Revenue	$184,383	$173,576
Net (loss) income	($9,347)	$7,776
Net (loss) income per common share, basic	($0.33)	$0.28
Net (loss) income per common share, diluted	($0.33)	$0.27

Goodwill_and_Intangibles_Addit

Goodwill and Intangibles - Additional Information (Detail) (USD $)	12 Months Ended						1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 12, 2013	Dec. 16, 2013	Sep. 30, 2013	Apr. 30, 2012	Aug. 31, 2012	Aug. 06, 2012
	Reporting_Unit			Hosted IP Communications (Europe) Ltd.	Finocom AG	Development Services Company	Research and Development	Adaption Technologies Ventures, Ltd.	Adaption Technologies Ventures, Ltd.
Finite Lived Intangible Assets Amortization [Line Items]	'	'	'	'	'	'	'	'	'
Goodwill	$65,192,000	$37,529,000	'	$18,280,000	$5,686,000	$2,100,000	'	'	$16,747,000
Number of reporting units	1	'	'	'	'	'	'	'	'
Increase in goodwill related to acquisitions	26,106,000	19,924,000	'	'	'	'	3,200,000	16,700,000	'
Amortization expense on intangible assets	3,900,000	2,700,000	1,300,000	'	'	'	'	'	'
Gross carrying amount of intangible assets retired	1,100,000	'	'	'	'	'	'	'	'
Accumulated amortization of intangible assets retired	$1,500,000	'	'	'	'	'	'	'	'

Goodwill_and_Intangibles_Summa

Goodwill and Intangibles - Summary of Changes in Carrying Amounts of Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]	'	'
Goodwill, gross, balance at beginning of period	$37,529	$17,276
Goodwill	65,192	37,529
Increase in goodwill related to acquisitions	26,106	19,924
Other	1,557	329
Goodwill, gross, balance at end of period	$65,192	$37,529

Goodwill_and_Intangibles_Sched

Goodwill and Intangibles - Schedule of Company's Acquired Intangible Assets Subject to Amortization (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Acquired Indefinite-lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$28,520	$16,953
Accumulated Amortization	8,130	5,706
Net Amount	20,390	11,247
Customer relationships	'	'
Acquired Indefinite-lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	14,698	5,255
Accumulated Amortization	3,362	2,765
Net Amount	11,336	2,490
Developed technology	'	'
Acquired Indefinite-lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	12,948	11,218
Accumulated Amortization	4,433	2,643
Net Amount	8,515	8,575
Non-compete agreement	'	'
Acquired Indefinite-lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	0	111
Accumulated Amortization	0	111
Net Amount	0	0
Tradenames	'	'
Acquired Indefinite-lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	874	369
Accumulated Amortization	335	187
Net Amount	$539	$182

Goodwill_and_Intangibles_Sched1

Goodwill and Intangibles - Schedule of Future Expected Amortization Expense on Intangible Assets (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Disclosure Goodwill And Intangibles Schedule Of Future Expected Amortization Expense On Intangible Assets [Abstract]	'	'
2014	$5,333	'
2015	4,729	'
2016	3,453	'
2017	2,338	'
2018	1,763	'
2019 and thereafter	2,774	'
Net Amount	$20,390	$11,247

Property_and_Equipment_Detail

Property and Equipment (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]	'	'	'
Property and equipment gross	$23,158,000	$16,903,000	'
Less accumulated depreciation and amortization	-13,048,000	-9,542,000	'
Property and equipment, net	10,110,000	7,361,000	'
Depreciation and amortization expense	3,900,000	2,600,000	1,800,000
Equipment	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property and equipment gross	13,421,000	9,607,000	'
Software	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property and equipment gross	5,256,000	3,346,000	'
Furniture and fixtures	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property and equipment gross	1,098,000	783,000	'
Leasehold improvements	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property and equipment gross	$3,383,000	$3,167,000	'

Accounts_payable_and_other_cur2

Accounts payable and other current liabilities - Schedule of Accounts Payable and Other Current Liabilities (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Disclosure Accounts Payable And Other Current Liabilities Schedule Of Accounts Payable And Other Current Liabilities [Abstract]	'	'
Accounts payable and accrued expenses	$5,744	$7,237
Accrued compensation	6,651	6,371
Other	2,562	2,078
Total accounts payable and accrued liabilities	$14,957	$15,686

Software_Licenses_Additional_I

Software Licenses - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	License
Disclosure Software Licenses Additional Information [Abstract]	'	'	'
Number of third party software licenses	35,000,000	'	'
Software licenses period (in years)	'4 years	'	'
Amount distributed for licenses	$6.40	'	'
Amortized cost of revenue period (in years)	'3 years 6 months	'	'
Additional cost for amortized cost of revenue	10.2	'	'
Extent annual billed license revenue	460	'	'
Extent of annual billed license revenue (in years)	'4 years	'	'
Amortization expense related to agreement	$2.60	$2.80	$1.80

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Before Income Taxes and Provision for (Benefit From) Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
(Loss) income before income taxes:	'	'	'
United States	($15,226)	$23,429	$25,178
Foreign	943	-4,495	-1,056
(Loss) income before income taxes	-14,283	18,934	24,122
Current:	'	'	'
Federal and state	7,718	407	4
Foreign	1,423	-1,355	760
Total current	9,141	-948	764
Deferred:	'	'	'
Federal and state	-15,240	8,068	-8,946
Foreign	690	-262	7
Total deferred	-14,550	7,806	-8,939
Provision for (benefit from) income taxes	($5,409)	$6,858	($8,175)

Income_Taxes_Components_of_Net

Income Taxes - Components of Net Deferred Tax Assets (Liabilities) and Related Valuation Allowance (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Deferred tax assets:	'	'
Net operating loss carry-forward	$5,993	$9,140
Deferred revenue	5,694	3,616
Depreciation and amortization	986	704
Research tax credit carry-forward	1,291	2,467
Accrued expenses	2,009	1,637
Stock based compensation	16,129	5,370
Other	4,110	880
Total deferred tax assets	36,212	23,814
Valuation allowance	-3,297	-5,558
Net deferred tax assets	32,915	18,256
Deferred tax liabilities	'	'
Acquired intangibles	-4,381	-1,568
Convertible debt discount	-10,913	-12,082
Other	-71	-244
Total deferred tax liabilities	-15,365	-13,894
Net deferred tax assets	$17,550	$4,362

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Income Taxes Additional Information [Abstract]	'	'	'
U.S. net operating loss carryforwards	$63.60	'	'
Research and experimentation tax credit carryforwards	2.3	'	'
Deferred tax liability for undistributed earnings	3.9	'	'
Percentage of deferred tax asset, valuation allowance	50.00%	'	'
Remaining valuation allowance related to foreign NOLs	'	3.3	'
Federal statutory tax rate (as a percent)	35.00%	34.00%	34.00%
Recognition of business tax credits relating to prior years	'	1.9	'
Recorded Interest and Penalties	$0.10	'	'

Income_Taxes_Provisions_for_In

Income Taxes - Provisions for Income Taxes Compared with Income Taxes Based on Federal Statutory Tax Rate (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Income Taxes Provisions For Income Taxes Compared With Income Taxes Based On Federal Statutory Tax Rate [Abstract]	'	'	'
Tax provision based on federal statutory rate	($4,999)	$6,437	$8,210
State taxes	617	723	947
Foreign rate differential	-157	104	-54
Permanent items	1,503	67	460
Stock based compensation	-147	938	478
Change in income tax valuation allowance	333	1,756	-16,388
Business tax credits	-1,829	-3,258	-1,204
Other	-730	91	-624
Provision for (benefit from) income taxes	($5,409)	$6,858	($8,175)

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]	'	'	'
Unrecognized tax benefits balance at January 1,	$821	$625	$618
Additions for tax positions of prior years	4,054	196	77
Settlements of tax positions of prior years	0	0	-70
Unrecognized tax benefits balance at December 31,	$4,875	$821	$625

Borrowings_Additional_Informat

Borrowings - Additional Information (Detail) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	31-May-08	Jun. 30, 2011	Dec. 31, 2013	Dec. 31, 2012	31-May-08	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2011
			License and maintenance agreement	Convertible senior notes	Convertible senior notes	Convertible senior notes	Installment Bank Loan	Installment Bank Loan	Installment Bank Loan	Installment Bank Loan
										loan
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'	'
Aggregate principal amount issued	$120,000,000	$120,000,000	'	$120,000,000	'	'	'	'	'	'
Coupon rate of notes (as a percent)	'	'	'	1.50%	'	'	'	'	'	'
Convertible senior notes due	'	'	'	1-Jul-18	'	'	'	'	'	'
Number of business days in conversion condition	'	'	'	'	'5 days	'	'	'	'	'
Number of consecutive trading days in condition	'	'	'	'	'10 days	'	'	'	'	'
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	'	'	'	'	'30 days	'	'	'	'	'
Percentage of applicable conversion price	'	'	'	'	130.00%	'	'	'	'	'
Conditions for conversion of notes	'(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 Notes for redemption	'	'	'	'	'	'	'	'	'
Initial conversion rate for the Notes (in shares)	'	'	'	'	23.8126	'	'	'	'	'
Principal amount of Notes	'	'	'	'	1,000	'	'	'	'	'
Conversion price of Notes (in dollars per share)	'	'	'	'	$41.99	'	'	'	'	'
Percentage of principal amount of the Notes being repurchased	'	'	'	'	100.00%	'	'	'	'	'
Conditions for redemption of notes	'	'	'	'	'Company may redeem for cash all or part of the Notes (except for the 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	'	'	'	'	'
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	'	'	'	'	'30 days	'	'	'	'	'
Percentage of interest rate estimated	8.00%	'	'	'	'	'	'	'	'	'
Initial fair value of the liability component	79,400,000	'	'	'	'	'	'	'	'	'
Amount allocated to the embedded conversion option	'	'	'	'	40,600,000	'	'	'	'	'
Offering costs	'	'	'	'	4,300,000	'	'	'	'	'
Offering costs classified as debt issuance costs	'	'	'	'	2,900,000	'	'	'	'	'
Fair value of the Notes	'	'	'	'	123,200,000	135,800,000	'	'	'	'
Carrying amount of equity component of the Notes	28,451,000	33,549,000	'	'	28,500,000	'	'	'	'	'
Unamortized offering costs	'	'	'	'	1,800,000	'	'	'	'	'
Offering costs allocated to equity component	'	'	'	'	1,400,000	'	'	'	'	'
Net proceeds from Note offering	'	'	'	'	115,700,000	'	'	'	'	'
Additional one-time fee in relation to the agreement	'	'	6,400,000	'	'	'	'	'	'	'
Effective interest rate of bank loan (as a percent)	'	'	'	'	'	'	4.00%	'	'	'
Scheduled principal repayments of loan	'	'	'	'	'	'	400,000	400,000	'	'
Liability for the loan	120,000,000	'	'	'	'	'	'	'	'	'
Number of loans	'	'	'	'	'	'	'	'	'	5
Variable interest rate (as a percent)	'	'	'	'	'	'	'	'	'	3.00%
Other notes payable	'	'	'	'	'	'	'	'	$1,000,000	'

Borrowings_Summary_of_Companys

Borrowings - Summary of Company's Financial Statements (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Disclosure Borrowings Summary Of Company Financial Statements [Abstract]	'	'
Convertible debt principal	$120,000	$120,000
Unamortized debt discount	-28,451	-33,549
Net carrying amount of convertible debt	$91,549	$86,451

Borrowings_Summary_of_Interest

Borrowings - Summary of Interest Expense Recognized (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Disclosure Borrowings Summary Of Interest Expense Recognized [Abstract]	'	'
Contractual interest expense	$1,800	$1,800
Amortization of debt issuance costs	406	406
Accretion of debt discount	5,098	4,714
Net interest expense	$7,304	$6,920

Borrowings_Aggregate_Maturitie

Borrowings - Aggregate Maturities of Borrowings (Detail) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Disclosure Borrowings Aggregate Maturities Of Borrowings [Abstract]	'
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$0
2014	0
2015	0
2016	0
2018, and thereafter	120,000
Total	$120,000

Stockholders_Equity_Deficit_Ad

Stockholders' Equity (Deficit) - Additional Information (Detail)	Dec. 31, 2013	Dec. 31, 2012	Jun. 21, 2010
Disclosure Stockholders Equity Deficit Additional Information [Abstract]	'	'	'
Authorized number of shares of preferred stock	5,000,000	5,000,000	5,000,000

Stockbased_Compensation_Additi

Stock-based Compensation - Additional Information (Detail) (USD $)

12 Months Ended

9 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

In Millions, except Share data, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Sep. 30, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Performance stock units

Performance Stock Units [Member]

Performance Stock Units [Member]

Performance Stock Units [Member]

Various Officers And Employees [Member]

Officers

Officers

Employees

Director

Officers and directors

Vesting Period Four Years

Vesting Period Four Years

Vesting Period Three Years

Vesting Period Three Years

Vesting Period Two Years

Vesting Period Two Years

Stock Option

Stock Option

Stock Option

Stock-based grants after 2005

Equity Incentive Plan 2009

Equity Incentive Plan 2009

Equity Incentive Plan 2009

Minimum

Maximum

Performance stock units

Performance Stock Units [Member]

Performance Stock Units [Member]

Performance stock units

Performance stock units

Performance stock units

Performance stock units

Employees and officers

Performance stock units

Employees

Performance stock units

Employees

Various Officers And Employees [Member]

Various Officers And Employees [Member]

Performance stock units

Performance stock units

Performance stock units

Performance stock units

Performance stock units

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Term of stock based grants (in years)

'10 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'5 years

'

'

'

'

'

Vesting period for grants (in years)

'

'

'

'

'

'4 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'4 years

'

'

'3 years

'4 years

Additional shares of common stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,250,000

1,219,787

'

'

Shares available for future issuance

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

118,663

'

'

'

'

Weighted average fair value of granted stock options (in dollars per share)

$32.72

'

'

'

$39.86

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$18.09

$20.14

$21.86

'

'

'

'

'

'

Intrinsic value of stock options exercised

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$5

$22.30

$59.30

'

'

'

'

'

'

Cash received from stock options exercised

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.3

2.5

3.9

'

'

'

'

'

'

Unrecognized stock-based compensation expense related to unvested options

'

'

'

24.5

'

4.3

'

'

'

'

'

'

'

'

'

'

'

'

'

9.5

'

'

'

'

'

'

'

'

Weighted average period of compensation expense to be recognized (in years)

'

'

'

'1 year 3 months 26 days

'

'1 year 4 months 2 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'1 year 5 months 12 days

'

'

'

'

'

'

'

'

Granted

1,518,023

'

'

'

382,500

'

'

1,510,176

382,500

55,000

'

7,847

211,450

'

352,600

'

128,309

'

4,925

'

'

'

'

'

'

'

'

'

Options vested and expected to vest (in shares)

'

'

'

'

'

'

10,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Vesting period for restricted stock units (in years)

'

'

'

'

'

'

'

'

'

'

'4 years

'

'

'4 years

'

'3 years

'

'2 years

'

'

'

'

'

'

'

'

'

'

Apic pool balance

7.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred tax asset related to tax benefits of employee stock option

'

'

0.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net operating loss carryforwards but not reflected in deferred tax assets

'

$63.60

$77.60

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stockbased_Compensation_Summar

Stock-based Compensation - Summary of Stock-based Compensation Expense Recognized by Company (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Total recognized stock-based compensation expense	$41,684	$15,022	$7,201
Stock options	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Total recognized stock-based compensation expense	8,644	6,512	2,394
Restricted stock units	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Total recognized stock-based compensation expense	28,020	8,388	4,807
Performance stock units	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Total recognized stock-based compensation expense	$5,020	$122	$0

Stockbased_Compensation_Summar1

Stock-based Compensation - Summary of Information Related to Stock Options (Detail) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013
Number of Options Outstanding	'
Beginning Balance	1,474,346
Granted	560,905
Exercised	-201,448
Canceled, expired or forfeited	-87,734
Ending Balance	1,746,069
Vested, Ending Balance	715,075
Exercisable, Ending Balance	715,075
Weighted Average Exercise Price	'
Beginning Balance	$23.50
Granted	$33.01
Exercised	$6.35
Canceled, expired or forfeited	$32.45
Ending Balance	$28.09
Vested, Ending Balance	$19.85
Exercisable, Ending Balance	$19.85
Weighted Average Remaining Contractual Term (years)	'
Term , Ending Balance	'8 years 0 months 22 days
Term Vested, Ending Balance	'6 years 9 months 26 days
Term Exercisable, Ending Balance	'6 years 9 months 26 days
Aggregate Intrinsic Value	'
Aggregate Intrinsic Value, Ending Balance	$10,042
Aggregate Intrinsic Value Vested, Ending Balance	8,880
Aggregate Intrinsic Value Exercisable, Ending Balance	$8,880

Stockbased_Compensation_Summar2

Stock-based Compensation - Summary of Activity for Restricted Stock Units (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Number of RSUs	'
Beginning balance	638,299
Granted	1,518,023
Vested	-287,683
Forfeited	-76,806
Ending balance	1,791,833
Weighted Average Grant Date Fair Value	'
Beginning balance	$34.25
Granted	$32.59
Vested	$32.72
Forfeited	$32.54
Ending balance	$33.16

Stockbased_Compensation_Stockb

Stock-based Compensation Stock-based Compensation - Summary of Activity for Performance Units (Details) (USD $)	12 Months Ended	9 Months Ended
	Dec. 31, 2013	Sep. 30, 2013
		Performance Stock Units [Member]
Number of PSUs	'	'
Beginning balance	638,299	10,000
Granted	1,518,023	382,500
Vested	-287,683	-10,000
Forfeited	-76,806	'
Ending balance	1,791,833	382,500
Weighted Average Grant Date Fair Value	'	'
Beginning balance	$34.25	$39.86
Granted	$32.59	$28.72
Vested	$32.72	$39.86
Forfeited	$32.54	'
Ending balance	$33.16	$28.72

Commitments_and_Contingencies_1

Commitments and Contingencies (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Commitments And Contingencies Summary Of Future Minimum Lease Payments Under Noncancelable Operating Leases [Abstract]	'	'	'
Rent expense	$3,200,000	$2,700,000	$2,100,000
2014	2,816,000	'	'
2015	2,533,000	'	'
2016	2,533,000	'	'
2017	2,400,000	'	'
2018 and thereafter	3,433,000	'	'
Total future minimum lease payments	$13,715,000	'	'

Segment_and_Geographic_Informa2

Segment and Geographic Information - Summary of Revenue and Long-Lived Assets, Net, by Geographic Area (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:	'	'	'	'	'	'	'	'	'	'	'
Total Revenue	$51,959	$42,900	$44,009	$39,625	$45,809	$40,174	$40,516	$38,343	$178,493	$164,842	$138,064
Long-Lived Assets, net	'	'	'	'	'	'	'	'	'	'	'
Total Long-Lived Assets, net	35,631	'	'	'	20,900	'	'	'	35,631	20,900	'
United States	'	'	'	'	'	'	'	'	'	'	'
Revenues:	'	'	'	'	'	'	'	'	'	'	'
Total Revenue	'	'	'	'	'	'	'	'	100,857	94,781	75,748
Long-Lived Assets, net	'	'	'	'	'	'	'	'	'	'	'
Total Long-Lived Assets, net	33,234	'	'	'	19,676	'	'	'	33,234	19,676	'
EMEA	'	'	'	'	'	'	'	'	'	'	'
Revenues:	'	'	'	'	'	'	'	'	'	'	'
Total Revenue	'	'	'	'	'	'	'	'	44,235	39,334	24,866
Long-Lived Assets, net	'	'	'	'	'	'	'	'	'	'	'
Total Long-Lived Assets, net	1,412	'	'	'	615	'	'	'	1,412	615	'
APAC	'	'	'	'	'	'	'	'	'	'	'
Revenues:	'	'	'	'	'	'	'	'	'	'	'
Total Revenue	'	'	'	'	'	'	'	'	20,990	17,994	25,332
Long-Lived Assets, net	'	'	'	'	'	'	'	'	'	'	'
Total Long-Lived Assets, net	497	'	'	'	158	'	'	'	497	158	'
Other	'	'	'	'	'	'	'	'	'	'	'
Revenues:	'	'	'	'	'	'	'	'	'	'	'
Total Revenue	'	'	'	'	'	'	'	'	12,411	12,733	12,118
Long-Lived Assets, net	'	'	'	'	'	'	'	'	'	'	'
Total Long-Lived Assets, net	$488	'	'	'	$451	'	'	'	$488	$451	'

401k_Defined_Contribution_Plan1

401(k) Defined Contribution Plan - Additional Information (Detail) (401 (k) Plan, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
401 (k) Plan	'	'
Pension Plans, Postretirement and Other Employee Benefits [Line Items]	'	'
Contributions to 401(k) plan	$1.80	$1.20

Quarterly_Financial_Data_Unaud2

Quarterly Financial Data (Unaudited) - Consolidated Results of Operations by Quarter (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Quarterly Financial Data Unaudited Consolidated Results Of Operations By Quarter [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Total revenue	$51,959	$42,900	$44,009	$39,625	$45,809	$40,174	$40,516	$38,343	$178,493	$164,842	$138,064
Gross profit	40,651	32,365	34,238	29,859	37,441	32,449	32,195	30,271	137,113	132,356	113,090
(Loss) income from operations	1,720	-2,989	-2,311	-3,757	8,443	6,476	5,576	4,909	-7,337	25,404	27,436
Net (loss) income	$512	($4,054)	($3,015)	($2,317)	$4,879	$3,140	$2,356	$1,701	($8,874)	$12,076	$32,297
Net income per share:	'	'	'	'	'	'	'	'	'	'	'
Basic	$0.02	($0.14)	($0.11)	($0.08)	$0.18	$0.11	$0.09	$0.06	($0.32)	$0.44	$1.21
Diluted	$0.02	($0.14)	($0.11)	($0.08)	$0.17	$0.11	$0.08	$0.06	($0.32)	$0.43	$1.15

Schedule_II_Valuation_and_Qual

Schedule II Valuation and Qualifying Accounts (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Allowance for doubtful accounts	'		'		'
Valuation and Qualifying Accounts Disclosure [Line Items]	'		'		'
Balance at Beginning of Year	$139		$54		$38
Amount Charged to Operations	149	[1]	718	[1]	56	[1]
Deductions	-160	[2]	-633	[2]	-40	[2]
Additions Acquired from Business Combinations	'		0		0
Balance at End of Year	128		139		54
Allowance for deferred tax assets	'		'		'
Valuation and Qualifying Accounts Disclosure [Line Items]	'		'		'
Balance at Beginning of Year	5,558		3,705		33,499
Amount Charged to Operations	0	[1]	1,853	[1]	-8,946	[1]
Deductions	-2,261	[2]	0	[2]	-22,979	[2]
Additions Acquired from Business Combinations	0		0		2,131
Balance at End of Year	$3,297		$5,558		$3,705
[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 NOL’s against the valuation allowance.