Informatica 10-Q 7 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jul. 31, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'INFORMATICA CORP	'
Entity Trading Symbol	'INFA	'
Entity Central Index Key	'0001080099	'
Document Type	'10-Q	'
Document Period End Date	30-Jun-14	'
Amendment Flag	'false	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Current Fiscal Year End Date	'--12-31	'
Entity Well-Known Seasoned Issuer	'Yes	'
Entity Voluntary Filers	'No	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	110,002

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$257,772	$297,818
Short-term investments	428,399	379,616
Accounts receivable, net of allowances of $4,028 and $4,135, respectively	181,493	204,374
Deferred tax assets	46,773	32,898
Prepaid expenses and other current assets	46,275	34,541
Total current assets	960,712	949,247
Property and equipment, net	159,318	157,308
Goodwill	558,993	523,142
Other intangible assets, net	49,324	41,625
Long-term deferred tax assets	30,674	44,865
Other assets	6,335	6,834
Total assets	1,765,356	1,723,021
Current liabilities:	'	'
Accounts payable	17,915	10,124
Accrued liabilities	49,967	63,055
Accrued compensation and related expenses	66,784	71,314
Income taxes payable	0	14,184
Deferred revenues	296,681	285,184
Total current liabilities	431,347	443,861
Long-term deferred revenues	14,113	12,938
Long-term income taxes payable	30,641	29,878
Other liabilities	4,190	594
Total liabilities	480,291	487,271
Commitments and contingencies (Note 11)	'	'
Stockholders' equity:	'	'
Common stock, $0.001 par value; 200,000 shares authorized; 109,829 shares and 108,643 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	110	109
Additional paid-in capital	805,452	805,728
Accumulated other comprehensive loss	-1,304	-3,212
Retained earnings	480,807	433,125
Total stockholders’ equity	1,285,065	1,235,750
Total liabilities and stockholders' equity	$1,765,356	$1,723,021

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Per Share data, unless otherwise specified
Current assets:	'	'
Accounts receivable, allowances	$4,028	$4,135
Stockholders' equity:	'	'
Common stock, par value (in usd per share)	$0.00	$0.00
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	109,829	108,643
Common stock, shares outstanding	109,829	108,643

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:	'	'	'	'
Software	$103,455	$91,428	$206,498	$179,334
Service	147,258	131,011	287,312	257,405
Total revenues	250,713	222,439	493,810	436,739
Cost of revenues:	'	'	'	'
Software	2,450	2,501	5,569	4,643
Service	43,343	36,463	83,572	72,493
Amortization of acquired technology	3,286	5,621	7,271	11,345
Total cost of revenues	49,079	44,585	96,412	88,481
Gross profit	201,634	177,854	397,398	348,258
Operating expenses:	'	'	'	'
Research and development	48,850	41,668	94,535	81,191
Sales and marketing	96,784	89,510	188,368	173,567
General and administrative	20,019	19,181	40,072	37,668
Amortization of intangible assets	1,384	2,000	2,920	3,988
Acquisitions and other charges (benefit)	771	-436	860	1,214
Total operating expenses	167,808	151,923	326,755	297,628
Income from operations	33,826	25,931	70,643	50,630
Interest income	1,179	893	2,332	1,783
Interest expense	-166	-128	-293	-248
Other expense, net	-198	-391	-282	-459
Income before income taxes	34,641	26,305	72,400	51,706
Income tax provision	11,812	8,139	24,718	15,633
Net income	$22,829	$18,166	$47,682	$36,073
Basic net income per common share	$0.21	$0.17	$0.44	$0.33
Diluted net income per common share	$0.20	$0.16	$0.43	$0.32
Shares used in computing basic net income per common share	109,739	108,138	109,453	107,904
Shares used in computing diluted net income per common share	111,601	111,344	111,770	111,305

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income	$22,829	$18,166	$47,682	$36,073
Other comprehensive income (loss):	'	'	'	'
Change in foreign currency translation adjustment, net of tax benefit (expense) of $(118), $(60), $(279) and $243	-312	800	257	-6,168
Available-for-sale investments:	'	'	'	'
Change in net unrealized gain (loss), net of tax benefit (expense) of $(77), $326, $(134) and $370	125	-533	218	-604
Less: reclassification adjustment for net (gain) loss included in net income, net of tax benefit (expense) of $(1), $7, $(2) and $10	-2	13	-4	17
Net change, net of tax benefit (expense) of $(76), $319, $(132) and $360	123	-520	214	-587
Cash flow hedges:	'	'	'	'
Change in unrealized gain (loss), net of tax benefit (expense) of $(250), $797, $(800) and $694	406	-1,300	1,304	-1,131
Less: reclassification adjustment for net (gain) loss included in net income, net of tax benefit (expense) of $(104), $51, $81 and $49	-168	83	133	80
Net change, net of tax benefit (expense) of $(146), $746, $(881) and $645	238	-1,217	1,437	-1,051
Total other comprehensive income (loss), net of tax effect	49	-937	1,908	-7,806
Total comprehensive income, net of tax effect	$22,878	$17,229	$49,590	$28,267

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax [Abstract]	'	'	'	'
Tax benefit (expense) related to foreign currency translation adjustment	($118)	($60)	($279)	$243
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax [Abstract]	'	'	'	'
Tax benefit (expense) related to available-for-sale investments, before reclassification adjustments	-77	326	-134	370
Less: Tax benefit (expense) related to reclassification adjustment for sale of securities included in net income	-1	7	-2	10
Tax benefit (expense) related to available-for-sale investments	-76	319	-132	360
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect [Abstract]	'	'	'	'
Tax benefit (expense) related to unrealized gain (loss) on cash flow hedges arising during the period	-250	797	-800	694
Less: Tax benefit (expense) related to reclassification adjustment on cash flow hedges included in net income	-104	51	81	49
Tax benefit (expense) related to cash flow hedges	($146)	$746	($881)	$645

CONDENSED_CONSOLIDATED_STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Operating activities:	'	'
Net income	$47,682	$36,073
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	9,066	7,263
Stock-based compensation	29,607	29,379
Deferred income taxes	-3,426	-3,663
Tax benefits from stock-based compensation	225	3,518
Excess tax benefits from stock-based compensation	-2,634	-4,810
Amortization of intangible assets and acquired technology	10,191	15,333
Other operating activities, net	0	-2,462
Changes in operating assets and liabilities:	'	'
Accounts receivable	23,491	21,308
Prepaid expenses and other assets	-2,324	-1,298
Accounts payable and accrued liabilities	-6,009	-8,131
Income taxes payable	-14,861	-4,572
Deferred revenues	11,073	20,989
Net cash provided by operating activities	102,081	108,927
Investing activities:	'	'
Purchases of property and equipment	-8,707	-5,017
Purchases of investments	-165,893	-232,304
Investment in equity interest, net	-282	0
Maturities of investments	86,855	106,247
Sales of investments	31,045	58,373
Business acquisitions, net of cash acquired	-54,614	-7,464
Net cash used in investing activities	-111,596	-80,165
Financing activities:	'	'
Net proceeds from issuance of common stock	31,742	30,100
Repurchases and retirement of common stock	-55,872	-42,982
Withholding taxes related to restricted stock units net share settlement	-5,978	-5,570
Payment of contingent consideration	-3,061	-2,490
Excess tax benefits from stock-based compensation	2,634	4,810
Purchase of acquiree stock	0	-6,365
Net cash used in financing activities	-30,535	-22,497
Effect of foreign exchange rate changes on cash and cash equivalents	4	-3,344
Net increase (decrease) in cash and cash equivalents	-40,046	2,921
Cash and cash equivalents at beginning of period	297,818	190,127
Cash and cash equivalents at end of period	$257,772	$193,048

Summary_of_Significant_Account

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	Summary of Significant Accounting Policies
	Basis of Presentation
	The accompanying condensed consolidated financial statements of Informatica Corporation (“Informatica,” or the “Company”) have been prepared in conformity with generally accepted accounting principles (“GAAP”) in the United States of America. However, certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed, or omitted, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). In the opinion of management, the financial statements include all normal and recurring adjustments that are necessary to fairly present the results of the interim periods presented. All of the amounts included in this Quarterly Report on Form 10-Q related to the condensed consolidated financial statements and notes thereto as of and for the three and six months ended June 30, 2014 and 2013 are unaudited. The interim results presented are not necessarily indicative of results for any subsequent interim period, the year ending December 31, 2014, or any other future period.
	The preparation of the Company's condensed consolidated financial statements in conformity with GAAP requires management to make certain estimates, judgments, and assumptions. The Company believes that the estimates, judgments, and assumptions upon which it relies are reasonable based on information available at the time that these estimates, judgments, and assumptions are made. These estimates, judgments, and assumptions can affect the reported amounts of assets and liabilities as of the date of the financial statements as well as the reported amounts of revenues and expenses during the periods presented. Any material differences between these estimates and actual results will impact the Company's condensed consolidated financial statements. In many cases, the accounting treatment of a particular transaction is specifically dictated by GAAP and does not require management's judgment in its application. There are also areas in which management's judgment in selecting any available alternative would not produce a materially different result.
	The condensed consolidated financial statements include the accounts of the Company and its wholly-owned and majority-owned subsidiaries. All intercompany accounts and transactions have been eliminated.
	In November 2012, the Company acquired a majority interest in the shares of Heiler Software AG ("Heiler Software") at the end of the initial acceptance period of the takeover offer. The squeeze-out of the remaining shareholders was effective in the second quarter of 2013, increasing the Company's ownership in Heiler Software to 100 percent. The Company consolidated the financial results of Heiler Software with its financial results beginning in November 2012. The noncontrolling interest in the Company's net income was not significant to consolidated results for the three and six months ended June 30, 2013 and therefore has been included as a component of other income (expense), net in the condensed consolidated statements of income.
	These unaudited, condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto for the year ended December 31, 2013 included in the Company's Annual Report on Form 10-K filed with the SEC. The consolidated balance sheet as of December 31, 2013 has been derived from the audited consolidated financial statements of the Company. The Company's significant accounting policies are described in Note 2 to the audited consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2013.
	Recent Accounting Pronouncements
	In March 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2013-05, Foreign Currency Matters (Topic 830): Parent's Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity. ASU 2013-05 clarifies that the cumulative translation adjustment (“CTA”) should be released into net income upon the occurrence of certain qualifying events. The Company adopted ASU 2013-05 prospectively as required on January 1, 2014. Adoption of ASU 2013-05 did not impact the Company's condensed consolidated financial statements and disclosures.
	In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists, which clarifies that an unrecognized tax benefit should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward if such settlement is required or expected in the event the uncertain tax position is disallowed. In situations where a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available or the tax law of the jurisdiction does not require, and the entity does not intend to use the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The Company adopted ASU 2013-11 prospectively as required on January 1, 2014. Adoption of ASU 2013-11 did not impact the Company's condensed consolidated financial statements and disclosures.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), to supersede nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those good and services. The standard will be effective for the Company in the first quarter of fiscal 2017. ASU 2014-09 allows for two methods of adoption: (a) "full retrospective" adoption, meaning the standard is applied to all periods presented, or (b) "modified retrospective" adoption, meaning the cumulative effect of applying ASU 2014-09 is recognized as an adjustment to the fiscal 2017 opening retained earnings balance. Early adoption is not permitted. The Company has not yet selected a transition method and is currently evaluating the impact of its pending adoption of ASU 2014-09 on its consolidated financial statements and disclosures.
	In June 2014, the FASB issued ASU 2014-12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period. ASU 2014-12 requires that a performance target that affects vesting and could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is effective for the Company in its first quarter of fiscal 2016 with early adoption permitted. The Company is currently evaluating the impact of its pending adoption of ASU 2014-12 on its consolidated financial statements and disclosures.
	There have been no other changes to the Company's significant accounting policies since the end of 2013.
	Fair Value Measurement of Financial Assets and Liabilities
	The Company did not have any financial liabilities measured at fair value on a recurring basis as of June 30, 2014. The following table summarizes financial assets that the Company measures at fair value on a recurring basis as of June 30, 2014 (in thousands):
					Quoted		Significant		Significant
					Prices in		Other		Unobservable
					Active		Observable		Inputs
					Markets for		Inputs		(Level 3)
					Identical		(Level 2)
		Total			Assets
					(Level 1)
	Assets:
	Money market funds (i)	$	16,448		$	16,448	$	—	$	—
	Time deposits (ii)	29,029			29,029		—		—
	Marketable debt securities (ii)	400,370			—		400,370		—
	Total money market funds, time deposits, and marketable debt securities	445,847			45,477		400,370		—
	Foreign currency derivatives (iii)	1,853			—		1,853		—
	Total assets	$	447,700		$	45,477	$	402,223	$	—
	The following table summarizes financial assets and financial liabilities that the Company measures at fair value on a recurring basis as of December 31, 2013 (in thousands):
					Quoted
					Prices in		Significant
					Active		Other		Significant
					Markets for		Observable		Unobservable
					Identical		Inputs		Inputs
		Total			Assets		(Level 2)		(Level 3)
					(Level 1)
	Assets:
	Money market funds (i)	$	21,893		$	21,893	$	—	$	—
	Time deposits (ii)	21,585			21,585		—		—
	Marketable debt securities (ii)	370,384			—		370,384		—
	Total money market funds, time deposits, and marketable debt securities	413,862			43,478		370,384		—
	Foreign currency derivatives (iii)	284			—		284		—
	Total assets	$	414,146		$	43,478	$	370,668	$	—
	Liabilities:
	Foreign currency derivatives (iv)	$	1,024		$	—	$	1,024	$	—
	Acquisition-related contingent consideration (iv)	3,071			—		—		3,071
	Total liabilities	$	4,095		$	—	$	1,024	$	3,071
	____________________
	(i)	Included in cash and cash equivalents on the condensed consolidated balance sheets.
	(ii)	Included in either cash and cash equivalents or short-term investments on the condensed consolidated balance sheets.
	(iii)	Included in prepaid expenses and other current assets on the condensed consolidated balance sheets.
	(iv)	Included in accrued liabilities on the condensed consolidated balance sheets.
	Money Market Funds, Time Deposits, and Marketable Debt Securities
	The Company uses a market approach for determining the fair value of all its Level 1 and Level 2 money market funds, time deposits, and marketable securities.
	To value its money market funds and time deposits, the Company values the funds at $1 stable net asset value, which is the market pricing convention for identical assets that the Company has the ability to access.
	The Company's marketable securities consist of certificates of deposit, commercial paper, corporate notes and bonds, municipal securities, and U.S. government and agency notes and bonds. To value its certificates of deposit and commercial paper, the Company uses mathematical calculations to arrive at fair value for these securities, which generally have short maturities and infrequent secondary market trades. For example, in the absence of any observable transactions, the Company may accrete from purchase price at purchase date to face value at maturity. In the event that a transaction is observed on the same security in the marketplace, and the price on that subsequent transaction clearly reflects the market price on that day, the Company will adjust the price in the system to the observed transaction price and follow a revised accretion schedule to determine the daily price.
	To determine the fair value of its corporate notes and bonds, municipal securities, and U.S. government and agency notes and bonds, the Company uses a third party pricing source for each security. If the market price is not available from the third party source, pricing from the Company's investment custodian is used.
	Foreign Currency Derivatives and Hedging Instruments
	The Company uses the income approach to value the derivatives using observable Level 2 market inputs at the measurement date and standard valuation techniques to convert future amounts to a single present value amount, assuming that participants are motivated but not compelled to transact. Level 2 inputs are limited to quoted prices that are observable for the derivative assets and liabilities. The Company records its derivative assets and liabilities at gross in the condensed consolidated balance sheet and uses mid-market pricing as a practical expedient for fair value measurements. Key inputs for foreign currency derivatives are the spot rates, forward rates, interest rates, and credit derivative market rates. The spot rate for each foreign currency is the same spot rate used for all balance sheet translations at the measurement date and is sourced from the Federal Reserve Bulletin. The following values are interpolated from commonly quoted intervals available from Bloomberg: forward points and the London Interbank Offered Rate (“LIBOR”) used to discount and determine the fair value of assets and liabilities. Credit default swap spread curves identified per counterparty at month end in Bloomberg are used to discount derivative assets for counterparty non-performance risk, all of which have terms of twelve months or less. The Company discounts derivative liabilities to reflect the Company’s own potential non-performance risk to lenders and has used the spread over LIBOR on its most recent corporate borrowing rate.
	The counterparties associated with the Company’s foreign currency forward contracts are large credit-worthy financial institutions, and the derivatives transacted with these entities are relatively short in duration; therefore, the Company does not consider counterparty concentration and non-performance to be material risks at this time. Both the Company and the counterparties are expected to perform under the contractual terms of the instruments.
	There were no transfers between Level 1 and Level 2 categories during the three and six months ended June 30, 2014 and 2013.
	See Note 5. Accumulated Other Comprehensive Income (Loss), Note 6. Derivative Financial Instruments, and Note 11. Commitments and Contingencies of Notes to Condensed Consolidated Financial Statements for a further discussion.
Acquisition-related Contingent Consideration
The Company estimated the fair value of the acquisition-related contingent consideration using a probability-weighted discounted cash flow model. This fair value measure was based on significant inputs not observed in the market and thus represented a Level 3 instrument. Level 3 instruments are valued based on unobservable inputs that are supported by little or no market activity and reflect our own assumptions in measuring fair value. There were no transfers into or out of the Level 3 category during the three and six months ended June 30, 2014 and 2013. The change in fair value of acquisition-related contingent consideration is included in acquisitions and other charges in the condensed consolidated statements of income.
The changes in the acquisition-related contingent consideration liability for the six months ended June 30, 2014 consisted of the following (in thousands):
	June 30,
	2014
Beginning balance as of December 31, 2013	$	3,071
Change in fair value of contingent consideration	(10		)
Payment of contingent consideration	(3,061		)
Ending balance as of June 30, 2014	$	—
See Note 13. Acquisitions of Notes to Condensed Consolidated Financial Statements for a further discussion.

Cash_Cash_Equivalents_and_Shor

Cash, Cash Equivalents, and Short-Term Investments	6 Months Ended
	Jun. 30, 2014
Cash, Cash Equivalents, and Short-term Investments [Abstract]	'
Cash, Cash Equivalents, and Short-term Investments	'
	Cash, Cash Equivalents, and Short-Term Investments
	The Company's short-term investments are classified as available-for-sale as of the balance sheet date and are reported at fair value with unrealized gains and losses reported as a separate component of accumulated other comprehensive income in stockholders' equity, net of tax. Realized gains or losses and other-than-temporary impairments, if any, on available-for-sale securities are reported in other income or expense as incurred. Realized gains recognized for the three and six months ended June 30, 2014 and 2013 were negligible. The cost of securities sold was determined based on the specific identification method.
	The following table summarizes the Company’s cash, cash equivalents, and short-term investments as of June 30, 2014 (in thousands):
				Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
	Cash	$	240,324	$	—		$	—		$	240,324
	Cash equivalents:
	Money market funds	16,448		—			—			16,448
	Municipal notes and bonds	1,000		—			—			1,000
	Total cash equivalents	17,448		—			—			17,448
	Total cash and cash equivalents	257,772		—			—			257,772
	Short-term investments:
	Certificates of deposit	1,920		—			—			1,920
	Commercial paper	3,999		—			—			3,999
	Corporate notes and bonds	214,083		334			(129		)	214,288
	Federal agency notes and bonds	71,017		11			(41		)	70,987
	Time deposits	29,029		—			—			29,029
	Municipal notes and bonds	107,904		274			(2		)	108,176
	Total short-term investments	427,952		619			(172		)	428,399
	Total cash, cash equivalents, and short-term investments	$	685,724	$	619		$	(172	)	$	686,171
	The following table summarizes the Company’s cash, cash equivalents, and short-term investments as of December 31, 2013 (in thousands):
				Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
	Cash	$	263,572	$	—		$	—		$	263,572
	Cash equivalents:
	Money market funds	21,893		—			—			21,893
	U.S. government notes and bonds	12,353		—			—			12,353
	Total cash equivalents	34,246		—			—			34,246
	Total cash and cash equivalents	297,818		—			—			297,818
	Short-term investments:
	Certificates of deposit	960		—			—			960
	Commercial paper	12,738		—			—			12,738
	Corporate notes and bonds	175,446		220			(220		)	175,446
	Federal agency notes and bonds	64,863		31			(69		)	64,825
	Time deposits	21,585		—			—			21,585
	Municipal notes and bonds	103,923		153			(14		)	104,062
	Total short-term investments	379,515		404			(303		)	379,616
	Total cash, cash equivalents, and short-term investments	$	677,333	$	404		$	(303	)	$	677,434
	See Note 1. Summary of Significant Accounting Policies of Notes to Condensed Consolidated Financial Statements for further information regarding the fair value of the Company's financial instruments.
	The following table summarizes the fair value and gross unrealized losses related to the Company’s short-term investments, aggregated by investment category that have been in a continuous unrealized loss position for less than twelve months, at June 30, 2014 (in thousands):
		Less Than 12 months
				Gross
		Fair		Unrealized
		Value		Losses
	Corporate notes and bonds	$	64,942	$	(129	)
	Federal agency notes and bonds	48,965		(36		)
	Municipal notes and bonds	4,789		(2		)
	Total	$	118,696	$	(167	)
	The following table summarizes the fair value and gross unrealized losses related to the Company’s short-term investments, aggregated by investment category that have been in a continuous unrealized loss position for greater than twelve months, at June 30, 2014 (in thousands):
		Greater Than 12 months
				Gross
		Fair		Unrealized
		Value		Losses
	Federal agency notes and bonds	$	2,494	$	(5	)
	Total	$	2,494	$	(5	)
	The changes in value of these investments are primarily related to changes in interest rates and are considered to be temporary in nature.
	The following table summarizes the cost and estimated fair value of the Company’s short-term investments by contractual maturity at June 30, 2014 (in thousands):
		Cost		Fair
				Value
	Due within one year	$	176,842	$	176,983
	Due in one year to two years	171,471		171,781
Due after two years	79,639		79,635
Total	$	427,952	$	428,399

Intangible_Assets_and_Goodwill

Intangible Assets and Goodwill	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Intangible Assets and Goodwill	'
	Intangible Assets and Goodwill
	The carrying amounts of the intangible assets other than goodwill as of June 30, 2014 and December 31, 2013 are as follows (in thousands, except years):
		June 30, 2014								December 31, 2013							Weighted
																	Average
																	Useful Life
		Cost			Accumulated			Net		Cost		Accumulated			Net		(Years)
					Amortization							Amortization
	Developed and core technology	$	144,643		$	(106,297	)	$	38,346	$	130,744	$	(99,026	)	$	31,718	6
	Other Intangible Assets:
	Customer relationships	45,183			(37,083		)	8,100		41,683		(35,216		)	6,467		5
	All other (i)	17,696			(14,818		)	2,878		17,205		(13,765		)	3,440		11-Apr
	Total other intangible assets	62,879			(51,901		)	10,978		58,888		(48,981		)	9,907
	Total intangible assets, net	$	207,522		$	(158,198	)	$	49,324	$	189,632	$	(148,007	)	$	41,625
	____________________
	(i)	All other includes vendor relationships, trade names, covenants not to compete, and patents.
	Total amortization expense related to intangible assets was $4.7 million and $7.6 million for the three months ended June 30, 2014 and 2013, respectively, and $10.2 million and $15.3 million for the six months ended June 30, 2014 and 2013, respectively. Certain intangible assets were recorded in foreign currencies; and therefore, the gross carrying amount and accumulated amortization are subject to foreign currency translation adjustments.
	As of June 30, 2014, the amortization expense related to identifiable intangible assets in future periods is expected to be as follows (in thousands):
		Acquired			Other			Total
		Technology			Intangible			Intangible
					Assets			Assets
	Remaining	$	5,861		$	3,023		$	8,884
	2014
	2015	9,998			4,014			14,012
	2016	8,550			2,160			10,710
	2017	6,605			863			7,468
	2018	4,582			439			5,021
	Thereafter	2,750			479			3,229
	Total expected amortization expense	$	38,346		$	10,978		$	49,324
	The changes in the carrying amount of goodwill for the six months ended June 30, 2014 are as follows (in thousands):
		June 30,
		2014
	Beginning balance as of December 31, 2013	$	523,142
	Goodwill from acquisition	36,116
	Subsequent goodwill adjustments	(265		)
	Ending balance as of June 30, 2014	$	558,993
	During the six months ended June 30, 2014, the Company recorded subsequent goodwill adjustments of $(0.3) million related to foreign currency translation adjustments. The goodwill is partially deductible for tax purposes. See Note 13. Acquisitions for a further discussion of goodwill from acquisitions.

Borrowings

Borrowings	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Borrowings	'
	Borrowings
	Credit Agreement
	On September 29, 2010, the Company entered into a Credit Agreement (the “Credit Agreement”) that matures on September 29, 2014. The Credit Agreement provides for an unsecured revolving credit facility in an amount of up to $220.0 million, with an option for the Company to request to increase the revolving loan commitments by an aggregate amount of up to $30.0 million with new or additional commitments, for a total credit facility of up to $250.0 million. No amounts were outstanding under the Credit Agreement as of June 30, 2014, and a total of $220.0 million remained available for borrowing.
	Revolving loans accrue interest at a per annum rate based on either, at our election, (i) the base rate plus a margin ranging from 1.00% to 1.75% depending on the Company's consolidated leverage ratio, or (ii) LIBOR (based on 1-, 2-, 3-, or 6-month interest periods) plus a margin ranging from 2.00% to 2.75% depending on the Company's consolidated leverage ratio. The base rate is equal to the highest of (i) JPMorgan Chase Bank, N.A.'s prime rate, (ii) the federal funds rate plus a margin equal to 0.50%, and (iii) LIBOR for a 1-month interest period plus a margin equal to 1.00%. Revolving loans may be borrowed, repaid and reborrowed until September 29, 2014, at which time all amounts borrowed must be repaid. Accrued interest on the revolving loans is payable quarterly in arrears with respect to base rate loans and at the end of each interest rate period (or at each 3- month interval in the case of loans with interest periods greater than 3 months) with respect to LIBOR loans. The Company is also obligated to pay other customary closing fees, arrangement fees, administrative fees, commitment fees, and letter of credit fees. A quarterly commitment fee is applied to the average daily unborrowed amount under the credit facility at a per annum rate ranging from 0.35% to 0.50% depending on the Company's consolidated leverage ratio. The Company may prepay the loans or terminate or reduce the commitments in whole or in part at any time, without premium or penalty, subject to certain conditions including minimum amounts in the case of commitment reductions and reimbursement of certain costs in the case of prepayments of LIBOR loans.
	The Credit Agreement contains customary representations and warranties, covenants, and events of default, including the requirement to maintain a maximum consolidated leverage ratio of 2.75 to 1.00 and a minimum consolidated interest coverage ratio of 3.50 to 1.00. The occurrence of an event of default could result in the acceleration of the obligations under the Credit Agreement. Under certain circumstances, a default interest rate will apply on all obligations during the existence of an event of default under the Credit Agreement at a per annum rate equal to 2.00% above the applicable interest rate for any overdue principal and 2.00% above the rate applicable for base rate loans for any other overdue amounts. The Company was in compliance with all covenants under the Credit Agreement as of June 30, 2014.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Accumulated Other Comprehensive Income (Loss)	'
	Accumulated Other Comprehensive Income (Loss)
	The following table summarizes the changes in accumulated balances for each component of other comprehensive income (loss) for the three months ended June 30, 2014, net of taxes (in thousands):
			Cumulative			Net Unrealized				Net Unrealized				Total
			Translation			Gain on				Gain on
			Adjustments			Available-for-Sale				Cash Flow Hedges
						Investments
	Accumulated other comprehensive income (loss) as of March 31, 2014		$	(2,310	)	$	154			$	803			$	(1,353	)
	Other comprehensive income (loss):
	Other comprehensive income before reclassifications, net of tax expense of $(118), $(77) and $(250)		(312		)	125				406				219
	Net gain reclassified from accumulated other comprehensive income (loss), net of tax expense of $ —, $(1) and $(104)		—			(2		)	(i)	(168		)	(ii)	(170		)
	Total other comprehensive income (loss), net of tax effect (iii)		(312		)	123				238				49
	Accumulated other comprehensive income (loss) as of June 30, 2014		$	(2,622	)	$	277			$	1,041			$	(1,304	)
	____________________
	(i)	The before-tax gain of $3 was included in other expense, net on the condensed consolidated statements of income.
	(ii)	The before-tax gain of $66 and $206 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
	(iii)	The tax expense was included in income tax provision on the condensed consolidated statements of income.
	The following table summarizes the changes in accumulated balances for each component of other comprehensive income (loss) for the three months ended June 30, 2013, net of taxes (in thousands):
			Cumulative			Net Unrealized				Net Unrealized				Total
			Translation			Gain (Loss) on				Gain (Loss) on
			Adjustments			Available-for-Sale				Cash Flow Hedges
						Investments
	Accumulated other comprehensive income (loss) as of March 31, 2013		$	(14,980	)	$	175			$	(94	)		$	(14,899	)
	Other comprehensive income (loss):
	Other comprehensive income before reclassifications, net of tax benefit (expense) of $(60), $326 and $797		800			(533		)		(1,300		)		(1,033		)
	Net loss reclassified from accumulated other comprehensive income (loss), net of tax benefit of $ —, $7 and $51		—			13			(i)	83			(ii)	96
	Total other comprehensive income (loss), net of tax effect (iii)		800			(520		)		(1,217		)		(937		)
	Accumulated other comprehensive loss as of June 30, 2013		$	(14,180	)	$	(345	)		$	(1,311	)		$	(15,836	)
	____________________
	(i)	The before-tax loss of $20 was included in other expense, net on the condensed consolidated statements of income.
	(ii)	The before-tax losses of $31 and $103 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
	(iii)	The tax benefit (expense) was included in income tax provision on the condensed consolidated statements of income.
	The following table summarizes the changes in accumulated balances for each component of other comprehensive income (loss) for the six months ended June 30, 2014, net of taxes (in thousands):
			Cumulative			Net Unrealized				Net Unrealized				Total
			Translation			Gain on				Gain (Loss) on
			Adjustments			Available-for-Sale				Cash Flow Hedges
						Investments
	Accumulated other comprehensive income (loss) as of December 31, 2013		$	(2,879	)	$	63			$	(396	)		$	(3,212	)
	Other comprehensive income (loss):
	Other comprehensive income before reclassifications, net of tax expense of $(279), $(134) and $(800)		257			218				1,304				1,779
	Net (gain) loss reclassified from accumulated other comprehensive income (loss), net of tax benefit (expense) of $ —, $(2) and $81		—			(4		)	(i)	133			(ii)	129
	Total other comprehensive income, net of tax effect (iii)		257			214				1,437				1,908
	Accumulated other comprehensive income (loss) as of June 30, 2014		$	(2,622	)	$	277			$	1,041			$	(1,304	)
	____________________
	(i)	The before-tax gain of $6 was included in other expense, net on the condensed consolidated statements of income.
	(ii)	The before-tax losses of $54 and $160 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
	(iii)	The tax benefit (expense) was included in income tax provision on the condensed consolidated statements of income.
	The following table summarizes the changes in accumulated balances for each component of other comprehensive income (loss) for the six months ended June 30, 2013, net of taxes (in thousands):
			Cumulative			Net Unrealized				Net Unrealized				Total
			Translation			Gain (Loss) on				Gain (Loss) on
			Adjustments			Available-for-Sale				Cash Flow Hedges
						Investments
	Accumulated other comprehensive income (loss) as of December 31, 2012		$	(8,012	)	$	242			$	(260	)		$	(8,030	)
	Other comprehensive loss:
	Other comprehensive loss before reclassifications, net of tax benefit of $243, $370 and $694		(6,168		)	(604		)		(1,131		)		(7,903		)
	Net loss reclassified from accumulated other comprehensive loss, net of tax benefit of $ —, $10 and $49		—			17			(i)	80			(ii)	97
	Total other comprehensive loss, net of tax effect (iii)		(6,168		)	(587		)		(1,051		)		(7,806		)
	Accumulated other comprehensive loss as of June 30, 2013		$	(14,180	)	$	(345	)		$	(1,311	)		$	(15,836	)
	____________________
	(i)	The before-tax loss of $27 was included in other expense, net on the condensed consolidated statements of income.
	(ii)	The before-tax losses of $31 and $98 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
	(iii)	The tax benefit was included in income tax provision on the condensed consolidated statements of income.
	The Company did not have any other-than-temporary impairment recognized in accumulated other comprehensive income (loss) as of June 30, 2014 and December 31, 2013.
	The Company determines the basis of the cost of a security sold and the amount reclassified out of other comprehensive income into statement of income based on specific identification.
See Note 1. Summary of Significant Accounting Policies, Note 6. Derivative Financial Instruments, and Note 11. Commitments and Contingencies of Notes to Condensed Consolidated Financial Statements for a further discussion.

Derivative_Financial_Instrumen

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Financial Instruments	'
	Derivative Financial Instruments
	The Company’s earnings and cash flows are subject to fluctuations due to changes in foreign currency exchange rates. The Company uses derivative instruments to manage its exposures to fluctuations in certain foreign currency exchange rates which exist as part of ongoing business operations. The Company and its subsidiaries do not enter into derivative contracts for speculative purposes.
	Cash Flow Hedges
	The Company enters into certain cash flow hedge programs in an attempt to reduce the impact of certain foreign currency fluctuations. These contracts are designated and documented as cash flow hedges. The purpose of these programs is to reduce the volatility of identified cash flow and expenses caused by movement in certain foreign currency exchange rates, in particular, the Indian rupee. The Company is currently using foreign exchange forward contracts to hedge the foreign currency anticipated expenses of its subsidiary in India.
	The Company releases the amounts accumulated in other comprehensive income into earnings in the same period or periods during which the forecasted hedge transaction affects earnings. The Company will reclassify all amounts accumulated in other comprehensive income into earnings within the next 12 months.
	The Company has forecasted the amount of its anticipated foreign currency expenses based on its historical performance and its projected financial plan. As of June 30, 2014, the remaining open foreign exchange contracts, carried at fair value, are hedging Indian rupee expenses and have a maturity of twelve months or less. These foreign exchange contracts mature monthly as the foreign currency denominated expenses are paid and any gain or loss is offset against operating expense. Once the hedged item is recognized, the cash flow hedge is de-designated and subsequent changes in value are recognized in other income (expense) to offset changes in the value of the resulting non-functional currency monetary assets or liabilities.
	The notional amounts of these foreign exchange forward contracts in U.S. dollar equivalents were to buy $25.5 million and $30.1 million of Indian rupees as of June 30, 2014 and December 31, 2013, respectively.
	Balance Sheet Hedges
	Balance Sheet hedges consist of cash flow hedge contracts that have been de-designated and non-designated balance sheet hedges. These foreign exchange contracts are carried at fair value and either did not or no longer qualify for hedge accounting treatment and are not designated as hedging instruments. Changes in the value of the foreign exchange contracts are recognized in other income (expense) and offset the foreign currency gain or loss on the underlying net monetary assets or liabilities. The notional amounts of foreign currency contracts open at period end in US dollar equivalents were to buy $2.7 million and $2.6 million of Indian rupees at June 30, 2014 and December 31, 2013, respectively.
	The following table reflects the fair value amounts for the foreign exchange contracts designated and not designated as hedging instruments at June 30, 2014 and December 31, 2013 (in thousands):
		June 30, 2014						December 31, 2013
		Fair Value			Fair Value			Fair Value			Fair Value
		Derivative			Derivative			Derivative			Derivative
		Assets(i)			Liabilities(ii)			Assets(i)			Liabilities(ii)
	Derivatives designated as hedging instruments	$	1,658		$	—		$	284		$	830
	Derivatives not designated as hedging instruments	195			—			—			194
	Total fair value of derivative instruments	$	1,853		$	—		$	284		$	1,024
	____________________
	(i)	Included in prepaid expenses and other current assets on the condensed consolidated balance sheets.
	(ii)	Included in accrued liabilities on the condensed consolidated balance sheets.
	The Company presents its derivative assets and derivative liabilities at gross fair values in the condensed consolidated balance sheets. However, under the master netting agreements with the respective counterparties of the foreign exchange contracts, subject to applicable requirements, the Company is allowed to net settle transactions of the same currency with a single net amount payable by one party to the other. The derivatives held by the Company are not subject to any credit contingent features negotiated with its counterparties. The Company is not required to pledge nor is entitled to receive cash collateral related to the above contracts.
	As of June 30, 2014, there were no derivative assets or liabilities which had the right of offset associated with these foreign exchange contracts. As a result, no amounts are presented in a net derivative asset or net derivative liability position.
	The following table sets forth the offsetting of derivative assets as of December 31, 2013 (in thousands):
											Gross Amounts Not Offset
											in the Condensed Consolidated
											Balance Sheets
		Gross			Gross			Net Amounts						Cash		Net
		Amounts of			Amounts Offset			of Assets			Financial			Collateral		Amount
		Recognized			in the Condensed			Presented			Instruments(i)			Pledged
		Assets			Consolidated			in the Condensed
					Balance Sheets			Consolidated
								Balance Sheets
	Foreign exchange contracts	$	284		$	—		$	284		$	(268	)	$	—	$	16
	____________________
	(i)	The balances at December 31, 2013 were related to derivative liabilities which are allowed to be net settled against derivative assets in accordance with the master netting agreements.
	The following table sets forth the offsetting of derivative liabilities as of December 31, 2013 (in thousands):
											Gross Amounts Not Offset
											in the Condensed Consolidated
											Balance Sheets
		Gross			Gross			Net Amounts			Financial			Cash		Net
		Amounts of			Amounts Offset			of Liabilities			Instruments(ii)			Collateral		Amount
		Recognized			in the Condensed			Presented						Pledged
		Liabilities			Consolidated			in the Condensed
					Balance Sheets			Consolidated
								Balance Sheets
	Foreign exchange contracts	$	1,024		$	—		$	1,024		$	(268	)	$	—	$	756
	____________________
	(ii)	The balances at December 31, 2013 were related to derivative assets which are allowed to be net settled against derivative liabilities in accordance with the master netting agreements.
	The Company evaluates prospectively as well as retrospectively the effectiveness of its hedge programs using statistical analysis. Prospective testing is performed at the inception of the hedge relationship and quarterly thereafter. Retrospective testing is performed on a quarterly basis. In October 2013, the Company changed its effectiveness assessment method from the spot to spot price method to include time value in the assessment. Prospectively, the Company includes all changes in value that are effective including changes in time value to accumulated other comprehensive income. The Company no longer records amounts as an excluded component of the hedge relationship.
	The before-tax effects of derivative instruments designated as cash flow hedges on the accumulated other comprehensive income (loss) and condensed consolidated statements of income for the three and six months ended June 30, 2014 and 2013 are as follows (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Amount of gain (loss) recognized in other comprehensive income (effective portion)	$	656		$	(2,097	)	$	2,104		$	(1,825	)
	Amount of gain (loss) reclassified from accumulated other comprehensive income to cost of service revenues and operating expenses (effective portion)	$	272		$	(134	)	$	(214	)	$	(129	)
	Amount of gain recognized in income on derivatives for the amount excluded from effectiveness testing located in operating expenses	$	—		$	507		$	—		$	577
	The Company did not have any ineffective portion of the derivative recorded in the condensed consolidated statements of income.
	The before-tax gain (loss) recognized in other expense, net for non-designated foreign currency forward contracts for the three and six months ended June 30, 2014 and 2013 are as follows (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Gain (loss) recognized in other expense, net	$	(6	)	$	(212	)	$	69		$	(191	)
	See Note 1. Summary of Significant Accounting Policies, Note 5. Accumulated Other Comprehensive Income (Loss), and Note 11. Commitments and Contingencies of Notes to Condensed Consolidated Financial Statements for a further discussion.

Stock_Repurchase_Program

Stock Repurchase Program	6 Months Ended
	Jun. 30, 2014
Stock Repurchase Program [Abstract]	'
Stock Repurchase Program	'
	Stock Repurchase Program
	The Company's Board of Directors has approved a stock repurchase program for the Company to repurchase its common stock. The primary purpose of the program is to enhance shareholder value, including partially offsetting the dilutive impact of stock based incentive plans. The number of shares to be purchased and the timing of the purchases are based on several factors, including the price of the Company's common stock, the Company's liquidity and working capital needs, general business and market conditions, and other investment opportunities. These purchases can be made from time to time in the open market and are funded from the Company’s available working capital. In January 2014, the Board of Directors approved the repurchase of up to an additional $100.0 million of the Company's outstanding common stock. As of June 30, 2014, $48.1 million remained available for share repurchases under this program. In July 2014, the Company announced that the Board of Directors approved the repurchase of up to an additional $100.0 million of the Company's outstanding stock.
	This repurchase program does not have an expiration date. Repurchased shares are retired and reclassified as authorized and unissued shares of common stock. The Company may continue to repurchase shares from time to time, as determined by management under programs approved by the Board of Directors.
	During the three and six months ended June 30, 2014, the Company repurchased approximately 896,000 shares of its common stock at a cost of $32.5 million and approximately 1,478,000 shares of its common stock at a cost of $55.9 million, respectively. During the three and six months ended June 30, 2013, the Company repurchased approximately 594,000 shares of its common stock at a cost of $21.0 million and approximately 1,204,000 shares of its common stock at a cost of $43.0 million, respectively.

StockBased_Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	Stock-Based Compensation
	The Company grants stock options, restricted stock units (“RSUs”) and performance-based restricted stock units (“PRSUs”) under its 2009 Equity Incentive Plan. Eligible employees may elect to purchase shares of common stock through the Employee Stock Purchase Plan ("ESPP"). The fair value of each option award and ESPP share is estimated on the date of grant using the Black-Scholes-Merton option pricing model that uses the assumptions in the following table. The Company has consistently used a blend of average historical and market-based implied volatilities for calculating the expected volatilities for employee stock options, and uses market-based implied volatilities for its ESPP. The expected term of employee stock options granted is derived from historical exercise patterns of the options, and the expected term of ESPP is based on the contractual terms. The expected term of options granted to employees is derived from the historical option exercises, post-vesting cancellations, and estimates concerning future exercises and cancellations for vested and unvested options that remain outstanding. The risk-free interest rate for the expected term of the option and ESPP is based on the U.S. Treasury yield curve in effect at the time of grant. The Company recognizes its stock-based compensation related to options using a straight-line method over the vesting term of the awards. The Company recognizes its stock-based compensation related to ESPP using a straight-line method over the offering period, which is six months.
	The fair value of RSUs and PRSUs is the grant date closing price of our common stock. The Company recognizes expense related to RSUs using a straight-line method over the vesting term of the awards. The Company recognizes expense for PRSUs based on the probability of achieving certain performance criteria, as defined in the PRSU agreements, and uses the graded vesting attribution method over the requisite service period.
	The Company records stock-based compensation for options, RSUs and PRSUs granted net of estimated forfeiture rates. ASC 718, Stock Compensation, requires the Company to estimate forfeiture rates at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical forfeitures to estimate its future forfeiture rates.
	The fair value of the Company’s share-based awards was estimated based on the following assumptions:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Option grants:
	Expected volatility	37	%		42	%		37 - 40%			41 - 43%
	Expected dividends	—			—			—			—
	Expected term of options (in years)	3.5			3.3			3.5			3.3
	Risk-free interest rate	1.3	%		0.6	%		1.1	%		0.6	%
	ESPP: (i)
	Expected volatility	—	%		—	%		36	%		42	%
	Expected dividends	—			—			—			—
	Expected term of ESPP (in years)	—			—			0.5			0.5
	Risk-free interest rate	—	%		—	%		0.1	%		0.1	%
	____________________
	(i)	ESPP purchases are made on the last day of January and July of each year.
	The allocations of the stock-based compensation, net of estimated income tax benefit, for the three and six months ended June 30, 2014 and 2013 are as follows (in thousands):
		Three Months Ended								Six Months Ended
		June 30,								June 30,
		2014				2013				2014			2013
	Cost of service revenues	$	1,454			$	1,433			$	2,918		$	2,763
	Research and development	5,214				4,978				9,876			9,418
	Sales and marketing	5,137				5,686				9,843			10,375
	General and administrative	3,556				3,752				6,970			6,823
	Total stock-based compensation	15,361				15,849				29,607			29,379
	Estimated tax benefit of stock-based compensation	(4,189		)		(4,312		)		(8,051		)	(7,952		)
	Total stock-based compensation, net of estimated tax benefit	$	11,172			$	11,537			$	21,556		$	21,427
	Stock Option Activity
	A summary of stock option activity through June 30, 2014 is presented below (in thousands, except per share amounts):
					Weighted-				Weighted		Aggregate
					Average				Average		Intrinsic
		Number of			Exercise Price				Remaining		Value
		Shares			Per Share				Contractual
									Term (Years)
	Outstanding at December 31, 2013	9,424			$	29.05			3.48		$	127,697
	Granted	1,298			$	38.14
	Exercised	(1,955	)		$	10.52
	Forfeited or expired	(572	)		$	43.2
	Outstanding at June 30, 2014	8,195			$	33.93			4.31		$	41,010
	Exercisable at June 30, 2014	4,586			$	30.86			3.19		$	37,566
	Restricted Stock Unit Activity
	A summary of RSU activity, excluding PRSUs, through June 30, 2014 is presented below (in thousands, except per share amounts):
					Weighted-
					Average
		Number of			Grant Date
		Shares			Fair Value
	Outstanding at December 31, 2013	1,793			—
	Awarded	1,251			$	36.77
	Released	(411	)		$	36
	Forfeited	(123	)		$	39.85
	Outstanding at June 30, 2014	2,510			—
	Performance-Based Restricted Stock Unit Activity
	During the first quarter of 2014, the Company granted approximately 224,000 target PRSUs. The performance period for the PRSUs granted in 2014 is the 2014 fiscal year. If certain performance goals are met, PRSUs would become eligible to vest, and vest ratably over two or four years on the annual anniversary dates of the grant, contingent upon the recipient’s continued service to the company. Certain participants have the ability to receive up to 125% to 150% of the target number of shares originally granted. The Compensation Committee of the Board of Directors will certify actual performance achievement for these PRSUs in the first quarter of 2015. The weighted-average grant date fair value of 2014 PRSUs was $38.25 per share.
	The performance period for the 649,900 target number of PRSUs granted in 2013 was the 2013 fiscal year. In the first quarter of 2014, the Compensation Committee of the Board of Directors certified actual performance achievement for PRSUs granted in 2013, and as a result, 507,000 shares became eligible to vest. The achieved PRSUs vest ratably over four years on the annual anniversary dates of the grant, contingent upon the recipient's continued service to the Company. The weighted-average grant date fair value of 2013 PRSUs was $37.42 per share.
	A summary of PRSU activity based upon PRSUs granted in 2013, certified and actually achieved through June 30, 2014 is presented below (in thousands):
		Number of
		Shares
	Outstanding at December 31, 2013	—
	Achieved	507
Released	(122	)
Forfeited	(41	)
Outstanding at June 30, 2014	344

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The Company's effective tax rates were 34% and 31% for the three months ended June 30, 2014 and 2013, respectively, and 34% and 30% for the six months ended June 30, 2014 and 2013, respectively. The rates were lower than the federal statutory rate of 35% primarily due to the benefits of foreign earnings in lower-tax jurisdictions and the domestic manufacturing deduction, partially offset by nondeductible stock-based compensation, state income taxes, and the accrual of reserves related to uncertain tax positions. The higher tax rate for the three months ended June 30, 2014 as compared to the same period in 2013 was primarily due to the facts that the Company did not recognize any benefit from the federal research and development credit in 2014 and the Company recognized tax benefits from adjustments to tax reserves in the second quarter of 2013. In addition, the higher tax rate for the six months ended June 30, 2014 as compared to the same period in 2013 was primarily due to the facts that the Company recognized the entire 2012 research and development credit in the first quarter of 2013 and this credit expired on December 31, 2013.
	The Company is a U.S.-based multinational corporation subject to tax in various U.S. and foreign tax jurisdictions. This fact causes the Company's effective tax rate to be sensitive to its geographic mix of earnings. The geographic mix of earnings is impacted by the fluctuation in currency exchange rates between the U.S. dollar and the functional currencies of the Company's foreign subsidiaries. The Company's results of operations will continue to be adversely affected to the extent that its geographic mix of earnings becomes more weighted toward jurisdictions with higher tax rates, and will be favorably affected to the extent the relative geographic mix shifts to lower tax jurisdictions. As of June 30, 2014, the Company has not provided for residual U.S. taxes in any of these lower-tax jurisdictions since it intends to indefinitely reinvest the net undistributed earnings of its foreign subsidiaries offshore.
	ASC 740, Income Taxes, provides for the recognition of deferred tax assets if realization of such assets is more likely than not. In assessing the need for any additional valuation allowance in the quarter ended June 30, 2014, the Company considered all available evidence both positive and negative, including historical levels of income, legislative developments, expectations and risks associated with estimates of future taxable income, and ongoing prudent and feasible tax planning strategies.
	As a result of this analysis for the quarter ended June 30, 2014, consistent with prior periods, it was considered more likely than not that the Company's non-stock-based payments related deferred tax assets would be realized except for any increase to the deferred tax asset related to the California research and development credit and certain operating losses incurred outside of the United States. A valuation allowance has been recorded against this portion of the credit, even though this attribute has an indefinite life. In addition, the Company recorded a valuation allowance related to the deferred tax asset that is attributable to certain operating losses incurred outside of the United States.
	The unrecognized tax benefits related to ASC 740, if recognized, would impact the income tax provision by $26.6 million and $19.2 million as of June 30, 2014 and 2013, respectively. The Company has elected to include interest and penalties as a component of income tax expenses. Accrued interest and penalties as of June 30, 2014 and 2013 were approximately $3.7 million and $2.6 million, respectively. As of June 30, 2014, the gross unrecognized tax benefit was approximately $29.9 million.
	The Company files U.S. federal income tax returns as well as income tax returns in various states and foreign jurisdictions. The Company has been informed by certain state and foreign taxing authorities that it was selected for examination. Most state and foreign jurisdictions have three to six open tax years at any point in time. The field work for certain state and foreign audits have commenced and are at various stages of completion as of June 30, 2014.
	Although the outcome of any tax audit is uncertain, the Company believes that it has adequately provided in its financial statements for any additional taxes that it may be required to pay as a result of these examinations. The Company regularly assesses the likelihood of outcomes resulting from these examinations to determine the adequacy of its provision for income taxes, and believes its current reserve to be reasonable. If tax payments ultimately prove to be unnecessary, the reversal of these tax liabilities would result in tax benefits in the period that the Company had determined such liabilities were no longer necessary. However, if an ultimate tax assessment exceeds its estimate of tax liabilities, an additional tax provision might be required.

Net_Income_per_Common_Share

Net Income per Common Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Net Income per Common Share	'
	Net Income per Common Share
	The following table sets forth the calculation of basic and diluted net income per share for the three and six months ended June 30, 2014 and 2013 (in thousands, except per share amounts):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Net income	$	22,829	$	18,166	$	47,682	$	36,073
	Weighted-average shares of common stock used to compute basic net income per share (excluding unvested restricted stock)	109,739		108,138		109,453		107,904
	Effect of dilutive common stock equivalents:
	Dilutive effect of unvested restricted stock units	559		280		606		301
	Dilutive effect of employee stock options	1,303		2,926		1,711		3,100
	Shares used in computing diluted net income per common share	111,601		111,344		111,770		111,305
	Basic net income per common share	$	0.21	$	0.17	$	0.44	$	0.33
	Diluted net income per common share	$	0.2	$	0.16	$	0.43	$	0.32
	Weighted average stock options and restricted stock units excluded from calculation due to anti-dilutive effect	5,147		6,268		4,900		5,911

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Lease Obligations
	The Company leases certain office facilities under various non-cancelable operating leases, which expire at various dates through 2024 and require the Company to pay operating costs, including property taxes, insurance, and maintenance.
	Future minimum lease payments as of June 30, 2014 under non-cancelable operating leases with original terms in excess of one year are summarized as follows (in thousands):
		Operating
		Leases
	Remaining 2014	$	5,719
	2015	12,104
	2016	8,983
	2017	6,317
	2018	4,988
	Thereafter	12,128
	Total future minimum operating lease payments	$	50,239
	Warranties
	The Company generally provides a warranty for its software products and services to its customers for a period of three to six months. The Company’s software products’ media are generally warranted to be free from defects in materials and workmanship under normal use, and the products are also generally warranted to substantially perform as described in certain Company documentation and the product specifications. The Company’s services are generally warranted to be performed in a professional manner and to materially conform to the specifications set forth in a customer’s signed contract. In the event there is a failure of such warranties, the Company generally will correct or provide a reasonable work-around or replacement product. To date, the Company’s product warranty expense has not been significant. The warranty accrual as of June 30, 2014 and December 31, 2013 was not material.
	Indemnification
	The Company's software license agreements generally include certain provisions for indemnifying the customer against losses, expenses, liabilities, and damages that may be awarded against the customer in the event the Company’s software is found to infringe upon a patent, copyright, trademark, or other proprietary right of a third party. The agreements generally limit the scope of and remedies for such indemnification obligations in a variety of industry-standard respects, including but not limited to certain time and scope limitations and a right to replace an infringing product with a non-infringing product.
	The Company believes its internal development processes and other policies and practices limit its exposure related to these indemnification provisions. In addition, the Company requires its employees to sign a proprietary information and inventions agreement, which assigns the rights to its employees’ development work to the Company. To date, the Company has not had to reimburse any of its customers for any losses related to these indemnification provisions, and no material claims against the Company are outstanding as of June 30, 2014. The Company cannot determine the maximum amount of potential future payments, if any, related to such indemnification provisions due to the limited and infrequent history of prior indemnification claims.
	As permitted under Delaware law, the Company has agreements whereby the Company indemnifies its officers and directors for certain events or occurrences while the officer or director is, or was serving, at our request, in such capacity. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited; however, the Company has director and officer insurance coverage that reduces the Company's exposure and enables the Company to recover a portion of any future amounts paid. The Company believes the estimated fair value of these indemnification agreements in excess of applicable insurance coverage is minimal.
	The Company accrues for loss contingencies when available information indicates that it is probable that an asset has been impaired or a liability has been incurred and the amount of the loss can be reasonably estimated in accordance with ASC 450, Contingencies.
	Derivative Financial Instruments
	The Company uses derivative instruments to manage its exposure to fluctuations in certain foreign currency exchange rates which exist as part of ongoing business operations. See Note 1. Summary of Significant Accounting Policies, Note 5. Accumulated Other Comprehensive Income (Loss), and Note 6. Derivative Financial Instruments of Notes to Condensed Consolidated Financial Statements for a further discussion.
	Litigation
	The Company is a party to various legal proceedings and claims arising from the normal course of its business activities, including proceedings and claims related to patents and other intellectual property related matters. The Company reviews the status of each matter and records a provision for a liability when it is considered both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed quarterly and adjusted as additional information becomes available. If both of the criteria are not met, the Company assesses whether there is at least a reasonable possibility that a loss, or additional losses, may be incurred. If there is a reasonable possibility that a material loss may be incurred, the Company discloses the estimate of the possible loss, range of loss, or a statement that such an estimate cannot be made.
	Litigation is subject to inherent uncertainties. Were an unfavorable outcome to occur, there exists the possibility of a material adverse impact on the Company's financial position and results of operation for the period in which the unfavorable outcome occurred, and potentially in future periods.

Significant_Customer_Informati

Significant Customer Information and Segment Information	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Significant Customer Information and Segment Information	'
	Significant Customer Information and Segment Information
	The Company is organized and operates in a single segment:  the design, development, marketing, and sales of software solutions. The Company’s chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions and assessing financial performance. The Company markets its products and services in the United States and in foreign countries through its direct sales force and indirect distribution channels.
	No customer accounted for more than 10% of revenue in the three and six months ended June 30, 2014 and 2013. At June 30, 2014 and December 31, 2013, no customer accounted for more than 10% of the accounts receivable balance. North America revenues include the United States and Canada. Revenue from international customers (defined as those customers outside of North America) accounted for 36% and 35% of total revenues in the second quarter of 2014 and 2013, respectively, and 36% and 34% of total revenues for the six months ended June 30, 2014 and 2013, respectively.
	Total revenue by geographic region is summarized as follows (in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Revenues:
	North America	$	159,973	$	145,456	$	313,817	$	288,936
	Europe, the Middle East, and Africa	60,581		53,716		120,783		100,142
	Other	30,159		23,267		59,210		47,661
	Total revenues	$	250,713	$	222,439	$	493,810	$	436,739
	Property and equipment, net by geographic region are summarized as follows (in thousands):
		June 30,		December 31,
		2014		2013
	Property and equipment, net:
	North America	$	146,721	$	147,460
	Europe, the Middle East, and Africa	7,159		4,907
	Other	5,438		4,941
	Total property and equipment, net	$	159,318	$	157,308

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2014
Business Combinations [Abstract]	'
Acquisitions	'
	Acquisitions
	Acquisition in Fiscal Year 2014:
	StrikeIron
	In June 2014, the Company acquired all outstanding shares of StrikeIron, Inc. (“StrikeIron”), for aggregate consideration of approximately $54.6 million. StrikeIron provides cloud-based data-as-a-service for email and contact validation, and will enable the Company to enhance its cloud-based product portfolio. The goodwill is not deductible for tax purposes.
	Approximately $8.3 million of the consideration otherwise payable to former StrikeIron stockholders was placed into an escrow fund and held as partial security for the indemnification obligations of the former StrikeIron stockholders. The escrow fund will remain in place until September 2015.
	The following table summarizes the fair value of assets acquired and liabilities assumed of $50.5 million and the acquiree's transaction related costs and debt settlement of $4.1 million, which were paid by the Company (in thousands):
	Assumed liabilities, net of assets	$	(3,499	)
	Identifiable intangible assets:
	Developed and core technology	13,900
	Customer relationships	3,500
	Covenants not to compete	450
	Trade names	40
	Total identifiable net assets	14,391
	Goodwill	36,116
	Total assets acquired and liabilities assumed	50,507
	Acquiree's transaction related costs and debt settlement	4,138
	Total	$	54,645
	Acquisitions in Fiscal Year 2013:
	Active Endpoints
	In February 2013, the Company acquired Active Endpoints, Inc. (“Active Endpoints”), a privately-held company, for approximately $10.0 million in cash. Active Endpoints designs, markets, and supports on-premise and cloud-based process automation software solutions. Total assets acquired and liabilities assumed were approximately $10.0 million of which approximately $7.1 million was allocated to goodwill, $3.8 million was allocated to identifiable intangible assets, and $0.9 million to net liabilities assumed. The goodwill is not deductible for tax purposes.
	Approximately $1.5 million of the consideration otherwise payable to former Active Endpoints stockholders was placed into an escrow and held as partial security for certain indemnification obligations. The entire escrow fund was released in the second quarter of 2014.
	Heiler Software AG
	In November 2012, the Company acquired a majority interest in the shares of Heiler Software, a publicly-traded German company, at the end of the initial acceptance period of the takeover offer. The Company purchased the majority interest at a price of 7.04 Euro per share in cash, or approximately $101.9 million. Heiler Software provides enterprise product information management, master data management and procurement solutions that enable retailers, distributors and manufacturers to manage product information across channels and data sources. As of December 31, 2012, the Company held approximately 97.7% of the outstanding shares of Heiler Software. During December 2012 and the first half of 2013, the Company acquired other shareholders' interest in Heiler Software for approximately $6.8 million, which extinguished recorded liabilities to noncontrolling shareholders. Total cash consideration was approximately $108.7 million. The squeeze-out of the remaining shareholders was effective in the second quarter of 2013, increasing the Company's ownership in Heiler to 100 percent.
	The fair value of the noncontrolling interest in Heiler Software at the acquisition date was $2.9 million. The valuation techniques and significant inputs used to measure the fair value of the noncontrolling interest included quoted market prices.
	The following table summarizes the fair value of assets acquired and liabilities assumed at the acquisition date (in thousands):
	Net tangible assets	$	16,400
	Identifiable intangible assets:
	Developed and core technology	16,586
	Customer relationships	5,339
	Contract backlog	648
	Trade names	298
	In-process research and development	3,784
	Noncontrolling interest	(2,861		)
	Total identifiable net assets	40,194
	Goodwill	61,660
	Total cash consideration	$	101,854
	During the first quarter of 2013, the Company recorded $2.8 million of additional accrued liabilities during the measurement period. The goodwill is not deductible for tax purposes.
	The Company's business combinations completed in 2014 and 2013, either individually or in aggregate, did not have a material impact on the Company's condensed consolidated financial statements, and therefore pro forma disclosures have not been presented. The Company included the financial results of these companies in the condensed consolidated financial statements from their respective acquisition dates.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of Accounting	'
	Basis of Presentation
	The accompanying condensed consolidated financial statements of Informatica Corporation (“Informatica,” or the “Company”) have been prepared in conformity with generally accepted accounting principles (“GAAP”) in the United States of America. However, certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed, or omitted, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). In the opinion of management, the financial statements include all normal and recurring adjustments that are necessary to fairly present the results of the interim periods presented. All of the amounts included in this Quarterly Report on Form 10-Q related to the condensed consolidated financial statements and notes thereto as of and for the three and six months ended June 30, 2014 and 2013 are unaudited. The interim results presented are not necessarily indicative of results for any subsequent interim period, the year ending December 31, 2014, or any other future period.
	The preparation of the Company's condensed consolidated financial statements in conformity with GAAP requires management to make certain estimates, judgments, and assumptions. The Company believes that the estimates, judgments, and assumptions upon which it relies are reasonable based on information available at the time that these estimates, judgments, and assumptions are made. These estimates, judgments, and assumptions can affect the reported amounts of assets and liabilities as of the date of the financial statements as well as the reported amounts of revenues and expenses during the periods presented. Any material differences between these estimates and actual results will impact the Company's condensed consolidated financial statements. In many cases, the accounting treatment of a particular transaction is specifically dictated by GAAP and does not require management's judgment in its application. There are also areas in which management's judgment in selecting any available alternative would not produce a materially different result.
	The condensed consolidated financial statements include the accounts of the Company and its wholly-owned and majority-owned subsidiaries. All intercompany accounts and transactions have been eliminated.
	In November 2012, the Company acquired a majority interest in the shares of Heiler Software AG ("Heiler Software") at the end of the initial acceptance period of the takeover offer. The squeeze-out of the remaining shareholders was effective in the second quarter of 2013, increasing the Company's ownership in Heiler Software to 100 percent. The Company consolidated the financial results of Heiler Software with its financial results beginning in November 2012. The noncontrolling interest in the Company's net income was not significant to consolidated results for the three and six months ended June 30, 2013 and therefore has been included as a component of other income (expense), net in the condensed consolidated statements of income.
	These unaudited, condensed consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto for the year ended December 31, 2013 included in the Company's Annual Report on Form 10-K filed with the SEC. The consolidated balance sheet as of December 31, 2013 has been derived from the audited consolidated financial statements of the Company. The Company's significant accounting policies are described in Note 2 to the audited consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2013.
New Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In March 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2013-05, Foreign Currency Matters (Topic 830): Parent's Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity. ASU 2013-05 clarifies that the cumulative translation adjustment (“CTA”) should be released into net income upon the occurrence of certain qualifying events. The Company adopted ASU 2013-05 prospectively as required on January 1, 2014. Adoption of ASU 2013-05 did not impact the Company's condensed consolidated financial statements and disclosures.
	In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists, which clarifies that an unrecognized tax benefit should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward if such settlement is required or expected in the event the uncertain tax position is disallowed. In situations where a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available or the tax law of the jurisdiction does not require, and the entity does not intend to use the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The Company adopted ASU 2013-11 prospectively as required on January 1, 2014. Adoption of ASU 2013-11 did not impact the Company's condensed consolidated financial statements and disclosures.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), to supersede nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those good and services. The standard will be effective for the Company in the first quarter of fiscal 2017. ASU 2014-09 allows for two methods of adoption: (a) "full retrospective" adoption, meaning the standard is applied to all periods presented, or (b) "modified retrospective" adoption, meaning the cumulative effect of applying ASU 2014-09 is recognized as an adjustment to the fiscal 2017 opening retained earnings balance. Early adoption is not permitted. The Company has not yet selected a transition method and is currently evaluating the impact of its pending adoption of ASU 2014-09 on its consolidated financial statements and disclosures.
	In June 2014, the FASB issued ASU 2014-12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period. ASU 2014-12 requires that a performance target that affects vesting and could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is effective for the Company in its first quarter of fiscal 2016 with early adoption permitted. The Company is currently evaluating the impact of its pending adoption of ASU 2014-12 on its consolidated financial statements and disclosures.
	There have been no other changes to the Company's significant accounting policies since the end of 2013.
Fair Value Measurement of Financial Assets and Liabilities	'
	Money Market Funds, Time Deposits, and Marketable Debt Securities
	The Company uses a market approach for determining the fair value of all its Level 1 and Level 2 money market funds, time deposits, and marketable securities.
	To value its money market funds and time deposits, the Company values the funds at $1 stable net asset value, which is the market pricing convention for identical assets that the Company has the ability to access.
	The Company's marketable securities consist of certificates of deposit, commercial paper, corporate notes and bonds, municipal securities, and U.S. government and agency notes and bonds. To value its certificates of deposit and commercial paper, the Company uses mathematical calculations to arrive at fair value for these securities, which generally have short maturities and infrequent secondary market trades. For example, in the absence of any observable transactions, the Company may accrete from purchase price at purchase date to face value at maturity. In the event that a transaction is observed on the same security in the marketplace, and the price on that subsequent transaction clearly reflects the market price on that day, the Company will adjust the price in the system to the observed transaction price and follow a revised accretion schedule to determine the daily price.
	To determine the fair value of its corporate notes and bonds, municipal securities, and U.S. government and agency notes and bonds, the Company uses a third party pricing source for each security. If the market price is not available from the third party source, pricing from the Company's investment custodian is used.
	Foreign Currency Derivatives and Hedging Instruments
	The Company uses the income approach to value the derivatives using observable Level 2 market inputs at the measurement date and standard valuation techniques to convert future amounts to a single present value amount, assuming that participants are motivated but not compelled to transact. Level 2 inputs are limited to quoted prices that are observable for the derivative assets and liabilities. The Company records its derivative assets and liabilities at gross in the condensed consolidated balance sheet and uses mid-market pricing as a practical expedient for fair value measurements. Key inputs for foreign currency derivatives are the spot rates, forward rates, interest rates, and credit derivative market rates. The spot rate for each foreign currency is the same spot rate used for all balance sheet translations at the measurement date and is sourced from the Federal Reserve Bulletin. The following values are interpolated from commonly quoted intervals available from Bloomberg: forward points and the London Interbank Offered Rate (“LIBOR”) used to discount and determine the fair value of assets and liabilities. Credit default swap spread curves identified per counterparty at month end in Bloomberg are used to discount derivative assets for counterparty non-performance risk, all of which have terms of twelve months or less. The Company discounts derivative liabilities to reflect the Company’s own potential non-performance risk to lenders and has used the spread over LIBOR on its most recent corporate borrowing rate.
	The counterparties associated with the Company’s foreign currency forward contracts are large credit-worthy financial institutions, and the derivatives transacted with these entities are relatively short in duration; therefore, the Company does not consider counterparty concentration and non-performance to be material risks at this time. Both the Company and the counterparties are expected to perform under the contractual terms of the instruments.
	There were no transfers between Level 1 and Level 2 categories during the three and six months ended June 30, 2014 and 2013.
	See Note 5. Accumulated Other Comprehensive Income (Loss), Note 6. Derivative Financial Instruments, and Note 11. Commitments and Contingencies of Notes to Condensed Consolidated Financial Statements for a further discussion.
	Acquisition-related Contingent Consideration
	The Company estimated the fair value of the acquisition-related contingent consideration using a probability-weighted discounted cash flow model. This fair value measure was based on significant inputs not observed in the market and thus represented a Level 3 instrument. Level 3 instruments are valued based on unobservable inputs that are supported by little or no market activity and reflect our own assumptions in measuring fair value. There were no transfers into or out of the Level 3 category during the three and six months ended June 30, 2014 and 2013. The change in fair value of acquisition-related contingent consideration is included in acquisitions and other charges in the condensed consolidated statements of income.

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Policies)	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivatives, Offsetting Fair Value Amounts, Policy [Policy Text Block]	'
	The Company presents its derivative assets and derivative liabilities at gross fair values in the condensed consolidated balance sheets. However, under the master netting agreements with the respective counterparties of the foreign exchange contracts, subject to applicable requirements, the Company is allowed to net settle transactions of the same currency with a single net amount payable by one party to the other. The derivatives held by the Company are not subject to any credit contingent features negotiated with its counterparties. The Company is not required to pledge nor is entitled to receive cash collateral related to the above contracts.
Derivatives, Methods of Accounting, Hedge Effectiveness [Policy Text Block]	'
	The Company evaluates prospectively as well as retrospectively the effectiveness of its hedge programs using statistical analysis. Prospective testing is performed at the inception of the hedge relationship and quarterly thereafter. Retrospective testing is performed on a quarterly basis. In October 2013, the Company changed its effectiveness assessment method from the spot to spot price method to include time value in the assessment. Prospectively, the Company includes all changes in value that are effective including changes in time value to accumulated other comprehensive income. The Company no longer records amounts as an excluded component of the hedge relationship.

StockBased_Compensation_Polici

Stock-Based Compensation (Policies)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	The Company grants stock options, restricted stock units (“RSUs”) and performance-based restricted stock units (“PRSUs”) under its 2009 Equity Incentive Plan. Eligible employees may elect to purchase shares of common stock through the Employee Stock Purchase Plan ("ESPP"). The fair value of each option award and ESPP share is estimated on the date of grant using the Black-Scholes-Merton option pricing model that uses the assumptions in the following table. The Company has consistently used a blend of average historical and market-based implied volatilities for calculating the expected volatilities for employee stock options, and uses market-based implied volatilities for its ESPP. The expected term of employee stock options granted is derived from historical exercise patterns of the options, and the expected term of ESPP is based on the contractual terms. The expected term of options granted to employees is derived from the historical option exercises, post-vesting cancellations, and estimates concerning future exercises and cancellations for vested and unvested options that remain outstanding. The risk-free interest rate for the expected term of the option and ESPP is based on the U.S. Treasury yield curve in effect at the time of grant. The Company recognizes its stock-based compensation related to options using a straight-line method over the vesting term of the awards. The Company recognizes its stock-based compensation related to ESPP using a straight-line method over the offering period, which is six months.
	The fair value of RSUs and PRSUs is the grant date closing price of our common stock. The Company recognizes expense related to RSUs using a straight-line method over the vesting term of the awards. The Company recognizes expense for PRSUs based on the probability of achieving certain performance criteria, as defined in the PRSU agreements, and uses the graded vesting attribution method over the requisite service period.
	The Company records stock-based compensation for options, RSUs and PRSUs granted net of estimated forfeiture rates. ASC 718, Stock Compensation, requires the Company to estimate forfeiture rates at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical forfeitures to estimate its future forfeiture rates.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]	'
	The Company did not have any financial liabilities measured at fair value on a recurring basis as of June 30, 2014. The following table summarizes financial assets that the Company measures at fair value on a recurring basis as of June 30, 2014 (in thousands):
					Quoted		Significant		Significant
					Prices in		Other		Unobservable
					Active		Observable		Inputs
					Markets for		Inputs		(Level 3)
					Identical		(Level 2)
		Total			Assets
					(Level 1)
	Assets:
	Money market funds (i)	$	16,448		$	16,448	$	—	$	—
	Time deposits (ii)	29,029			29,029		—		—
	Marketable debt securities (ii)	400,370			—		400,370		—
	Total money market funds, time deposits, and marketable debt securities	445,847			45,477		400,370		—
	Foreign currency derivatives (iii)	1,853			—		1,853		—
	Total assets	$	447,700		$	45,477	$	402,223	$	—
	The following table summarizes financial assets and financial liabilities that the Company measures at fair value on a recurring basis as of December 31, 2013 (in thousands):
					Quoted
					Prices in		Significant
					Active		Other		Significant
					Markets for		Observable		Unobservable
					Identical		Inputs		Inputs
		Total			Assets		(Level 2)		(Level 3)
					(Level 1)
	Assets:
	Money market funds (i)	$	21,893		$	21,893	$	—	$	—
	Time deposits (ii)	21,585			21,585		—		—
	Marketable debt securities (ii)	370,384			—		370,384		—
	Total money market funds, time deposits, and marketable debt securities	413,862			43,478		370,384		—
	Foreign currency derivatives (iii)	284			—		284		—
	Total assets	$	414,146		$	43,478	$	370,668	$	—
	Liabilities:
	Foreign currency derivatives (iv)	$	1,024		$	—	$	1,024	$	—
	Acquisition-related contingent consideration (iv)	3,071			—		—		3,071
	Total liabilities	$	4,095		$	—	$	1,024	$	3,071
	____________________
	(i)	Included in cash and cash equivalents on the condensed consolidated balance sheets.
	(ii)	Included in either cash and cash equivalents or short-term investments on the condensed consolidated balance sheets.
	(iii)	Included in prepaid expenses and other current assets on the condensed consolidated balance sheets.
	(iv)	Included in accrued liabilities on the condensed consolidated balance sheets.
Change in Acquisition-Related Contingent Consideration Liability [Table Text Block]	'
	The changes in the acquisition-related contingent consideration liability for the six months ended June 30, 2014 consisted of the following (in thousands):
		June 30,
		2014
	Beginning balance as of December 31, 2013	$	3,071
	Change in fair value of contingent consideration	(10		)
	Payment of contingent consideration	(3,061		)
	Ending balance as of June 30, 2014	$	—

Cash_Cash_Equivalents_and_Shor1

Cash, Cash Equivalents, and Short-Term Investments (Tables)	6 Months Ended
	Jun. 30, 2014
Cash, Cash Equivalents, and Short-term Investments [Abstract]	'
Schedule of Cash, Cash Equivalents and Short-term Investments [Table Text Block]	'
	The following table summarizes the Company’s cash, cash equivalents, and short-term investments as of June 30, 2014 (in thousands):
				Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
	Cash	$	240,324	$	—		$	—		$	240,324
	Cash equivalents:
	Money market funds	16,448		—			—			16,448
	Municipal notes and bonds	1,000		—			—			1,000
	Total cash equivalents	17,448		—			—			17,448
	Total cash and cash equivalents	257,772		—			—			257,772
	Short-term investments:
	Certificates of deposit	1,920		—			—			1,920
	Commercial paper	3,999		—			—			3,999
	Corporate notes and bonds	214,083		334			(129		)	214,288
	Federal agency notes and bonds	71,017		11			(41		)	70,987
	Time deposits	29,029		—			—			29,029
	Municipal notes and bonds	107,904		274			(2		)	108,176
	Total short-term investments	427,952		619			(172		)	428,399
	Total cash, cash equivalents, and short-term investments	$	685,724	$	619		$	(172	)	$	686,171
	The following table summarizes the Company’s cash, cash equivalents, and short-term investments as of December 31, 2013 (in thousands):
				Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
	Cash	$	263,572	$	—		$	—		$	263,572
	Cash equivalents:
	Money market funds	21,893		—			—			21,893
	U.S. government notes and bonds	12,353		—			—			12,353
	Total cash equivalents	34,246		—			—			34,246
	Total cash and cash equivalents	297,818		—			—			297,818
	Short-term investments:
	Certificates of deposit	960		—			—			960
	Commercial paper	12,738		—			—			12,738
	Corporate notes and bonds	175,446		220			(220		)	175,446
	Federal agency notes and bonds	64,863		31			(69		)	64,825
	Time deposits	21,585		—			—			21,585
	Municipal notes and bonds	103,923		153			(14		)	104,062
	Total short-term investments	379,515		404			(303		)	379,616
	Total cash, cash equivalents, and short-term investments	$	677,333	$	404		$	(303	)	$	677,434
Available-for-sale Securities Continuous Unrealized Loss Position, Fair Value [Table Text Block]	'
	The following table summarizes the fair value and gross unrealized losses related to the Company’s short-term investments, aggregated by investment category that have been in a continuous unrealized loss position for less than twelve months, at June 30, 2014 (in thousands):
		Less Than 12 months
				Gross
		Fair		Unrealized
		Value		Losses
	Corporate notes and bonds	$	64,942	$	(129	)
	Federal agency notes and bonds	48,965		(36		)
	Municipal notes and bonds	4,789		(2		)
	Total	$	118,696	$	(167	)
	The following table summarizes the fair value and gross unrealized losses related to the Company’s short-term investments, aggregated by investment category that have been in a continuous unrealized loss position for greater than twelve months, at June 30, 2014 (in thousands):
		Greater Than 12 months
				Gross
		Fair		Unrealized
		Value		Losses
	Federal agency notes and bonds	$	2,494	$	(5	)
	Total	$	2,494	$	(5	)
Investments Classified by Contractual Maturity Date [Table Text Block]	'
	The following table summarizes the cost and estimated fair value of the Company’s short-term investments by contractual maturity at June 30, 2014 (in thousands):
		Cost		Fair
				Value
	Due within one year	$	176,842	$	176,983
	Due in one year to two years	171,471		171,781
	Due after two years	79,639		79,635
	Total	$	427,952	$	428,399

Intangible_Assets_and_Goodwill1

Intangible Assets and Goodwill (Tables)	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Finite-Lived Intangible Assets [Table Text Block]	'
	The carrying amounts of the intangible assets other than goodwill as of June 30, 2014 and December 31, 2013 are as follows (in thousands, except years):
		June 30, 2014								December 31, 2013							Weighted
																	Average
																	Useful Life
		Cost			Accumulated			Net		Cost		Accumulated			Net		(Years)
					Amortization							Amortization
	Developed and core technology	$	144,643		$	(106,297	)	$	38,346	$	130,744	$	(99,026	)	$	31,718	6
	Other Intangible Assets:
	Customer relationships	45,183			(37,083		)	8,100		41,683		(35,216		)	6,467		5
	All other (i)	17,696			(14,818		)	2,878		17,205		(13,765		)	3,440		11-Apr
	Total other intangible assets	62,879			(51,901		)	10,978		58,888		(48,981		)	9,907
	Total intangible assets, net	$	207,522		$	(158,198	)	$	49,324	$	189,632	$	(148,007	)	$	41,625
	____________________
	(i)	All other includes vendor relationships, trade names, covenants not to compete, and patents.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	'
	As of June 30, 2014, the amortization expense related to identifiable intangible assets in future periods is expected to be as follows (in thousands):
		Acquired			Other			Total
		Technology			Intangible			Intangible
					Assets			Assets
	Remaining	$	5,861		$	3,023		$	8,884
	2014
	2015	9,998			4,014			14,012
	2016	8,550			2,160			10,710
	2017	6,605			863			7,468
	2018	4,582			439			5,021
	Thereafter	2,750			479			3,229
	Total expected amortization expense	$	38,346		$	10,978		$	49,324
Schedule of Goodwill [Table Text Block]	'
	The changes in the carrying amount of goodwill for the six months ended June 30, 2014 are as follows (in thousands):
		June 30,
		2014
	Beginning balance as of December 31, 2013	$	523,142
	Goodwill from acquisition	36,116
	Subsequent goodwill adjustments	(265		)
	Ending balance as of June 30, 2014	$	558,993

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	'
	The following table summarizes the changes in accumulated balances for each component of other comprehensive income (loss) for the three months ended June 30, 2014, net of taxes (in thousands):
			Cumulative			Net Unrealized				Net Unrealized				Total
			Translation			Gain on				Gain on
			Adjustments			Available-for-Sale				Cash Flow Hedges
						Investments
	Accumulated other comprehensive income (loss) as of March 31, 2014		$	(2,310	)	$	154			$	803			$	(1,353	)
	Other comprehensive income (loss):
	Other comprehensive income before reclassifications, net of tax expense of $(118), $(77) and $(250)		(312		)	125				406				219
	Net gain reclassified from accumulated other comprehensive income (loss), net of tax expense of $ —, $(1) and $(104)		—			(2		)	(i)	(168		)	(ii)	(170		)
	Total other comprehensive income (loss), net of tax effect (iii)		(312		)	123				238				49
	Accumulated other comprehensive income (loss) as of June 30, 2014		$	(2,622	)	$	277			$	1,041			$	(1,304	)
	____________________
	(i)	The before-tax gain of $3 was included in other expense, net on the condensed consolidated statements of income.
	(ii)	The before-tax gain of $66 and $206 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
	(iii)	The tax expense was included in income tax provision on the condensed consolidated statements of income.
	The following table summarizes the changes in accumulated balances for each component of other comprehensive income (loss) for the three months ended June 30, 2013, net of taxes (in thousands):
			Cumulative			Net Unrealized				Net Unrealized				Total
			Translation			Gain (Loss) on				Gain (Loss) on
			Adjustments			Available-for-Sale				Cash Flow Hedges
						Investments
	Accumulated other comprehensive income (loss) as of March 31, 2013		$	(14,980	)	$	175			$	(94	)		$	(14,899	)
	Other comprehensive income (loss):
	Other comprehensive income before reclassifications, net of tax benefit (expense) of $(60), $326 and $797		800			(533		)		(1,300		)		(1,033		)
	Net loss reclassified from accumulated other comprehensive income (loss), net of tax benefit of $ —, $7 and $51		—			13			(i)	83			(ii)	96
	Total other comprehensive income (loss), net of tax effect (iii)		800			(520		)		(1,217		)		(937		)
	Accumulated other comprehensive loss as of June 30, 2013		$	(14,180	)	$	(345	)		$	(1,311	)		$	(15,836	)
	____________________
	(i)	The before-tax loss of $20 was included in other expense, net on the condensed consolidated statements of income.
	(ii)	The before-tax losses of $31 and $103 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
	(iii)	The tax benefit (expense) was included in income tax provision on the condensed consolidated statements of income.
	The following table summarizes the changes in accumulated balances for each component of other comprehensive income (loss) for the six months ended June 30, 2014, net of taxes (in thousands):
			Cumulative			Net Unrealized				Net Unrealized				Total
			Translation			Gain on				Gain (Loss) on
			Adjustments			Available-for-Sale				Cash Flow Hedges
						Investments
	Accumulated other comprehensive income (loss) as of December 31, 2013		$	(2,879	)	$	63			$	(396	)		$	(3,212	)
	Other comprehensive income (loss):
	Other comprehensive income before reclassifications, net of tax expense of $(279), $(134) and $(800)		257			218				1,304				1,779
	Net (gain) loss reclassified from accumulated other comprehensive income (loss), net of tax benefit (expense) of $ —, $(2) and $81		—			(4		)	(i)	133			(ii)	129
	Total other comprehensive income, net of tax effect (iii)		257			214				1,437				1,908
	Accumulated other comprehensive income (loss) as of June 30, 2014		$	(2,622	)	$	277			$	1,041			$	(1,304	)
	____________________
	(i)	The before-tax gain of $6 was included in other expense, net on the condensed consolidated statements of income.
	(ii)	The before-tax losses of $54 and $160 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
	(iii)	The tax benefit (expense) was included in income tax provision on the condensed consolidated statements of income.
	The following table summarizes the changes in accumulated balances for each component of other comprehensive income (loss) for the six months ended June 30, 2013, net of taxes (in thousands):
			Cumulative			Net Unrealized				Net Unrealized				Total
			Translation			Gain (Loss) on				Gain (Loss) on
			Adjustments			Available-for-Sale				Cash Flow Hedges
						Investments
	Accumulated other comprehensive income (loss) as of December 31, 2012		$	(8,012	)	$	242			$	(260	)		$	(8,030	)
	Other comprehensive loss:
	Other comprehensive loss before reclassifications, net of tax benefit of $243, $370 and $694		(6,168		)	(604		)		(1,131		)		(7,903		)
	Net loss reclassified from accumulated other comprehensive loss, net of tax benefit of $ —, $10 and $49		—			17			(i)	80			(ii)	97
	Total other comprehensive loss, net of tax effect (iii)		(6,168		)	(587		)		(1,051		)		(7,806		)
	Accumulated other comprehensive loss as of June 30, 2013		$	(14,180	)	$	(345	)		$	(1,311	)		$	(15,836	)
	____________________
	(i)	The before-tax loss of $27 was included in other expense, net on the condensed consolidated statements of income.
	(ii)	The before-tax losses of $31 and $98 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
	(iii)	The tax benefit was included in income tax provision on the condensed consolidated statements of income.

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	'
	The following table reflects the fair value amounts for the foreign exchange contracts designated and not designated as hedging instruments at June 30, 2014 and December 31, 2013 (in thousands):
		June 30, 2014						December 31, 2013
		Fair Value			Fair Value			Fair Value			Fair Value
		Derivative			Derivative			Derivative			Derivative
		Assets(i)			Liabilities(ii)			Assets(i)			Liabilities(ii)
	Derivatives designated as hedging instruments	$	1,658		$	—		$	284		$	830
	Derivatives not designated as hedging instruments	195			—			—			194
	Total fair value of derivative instruments	$	1,853		$	—		$	284		$	1,024
	____________________
	(i)	Included in prepaid expenses and other current assets on the condensed consolidated balance sheets.
	(ii)	Included in accrued liabilities on the condensed consolidated balance sheets.
Offsetting Assets [Table Text Block]	'
	The following table sets forth the offsetting of derivative assets as of December 31, 2013 (in thousands):
											Gross Amounts Not Offset
											in the Condensed Consolidated
											Balance Sheets
		Gross			Gross			Net Amounts						Cash		Net
		Amounts of			Amounts Offset			of Assets			Financial			Collateral		Amount
		Recognized			in the Condensed			Presented			Instruments(i)			Pledged
		Assets			Consolidated			in the Condensed
					Balance Sheets			Consolidated
								Balance Sheets
	Foreign exchange contracts	$	284		$	—		$	284		$	(268	)	$	—	$	16
	____________________
	(i)	The balances at December 31, 2013 were related to derivative liabilities which are allowed to be net settled against derivative assets in accordance with the master netting agreements.
Offsetting Liabilities [Table Text Block]	'
	The following table sets forth the offsetting of derivative liabilities as of December 31, 2013 (in thousands):
											Gross Amounts Not Offset
											in the Condensed Consolidated
											Balance Sheets
		Gross			Gross			Net Amounts			Financial			Cash		Net
		Amounts of			Amounts Offset			of Liabilities			Instruments(ii)			Collateral		Amount
		Recognized			in the Condensed			Presented						Pledged
		Liabilities			Consolidated			in the Condensed
					Balance Sheets			Consolidated
								Balance Sheets
	Foreign exchange contracts	$	1,024		$	—		$	1,024		$	(268	)	$	—	$	756
	____________________
	(ii)	The balances at December 31, 2013 were related to derivative assets which are allowed to be net settled against derivative liabilities in accordance with the master netting agreements.
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]	'
	The before-tax effects of derivative instruments designated as cash flow hedges on the accumulated other comprehensive income (loss) and condensed consolidated statements of income for the three and six months ended June 30, 2014 and 2013 are as follows (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Amount of gain (loss) recognized in other comprehensive income (effective portion)	$	656		$	(2,097	)	$	2,104		$	(1,825	)
	Amount of gain (loss) reclassified from accumulated other comprehensive income to cost of service revenues and operating expenses (effective portion)	$	272		$	(134	)	$	(214	)	$	(129	)
	Amount of gain recognized in income on derivatives for the amount excluded from effectiveness testing located in operating expenses	$	—		$	507		$	—		$	577
	The Company did not have any ineffective portion of the derivative recorded in the condensed consolidated statements of income.
	The before-tax gain (loss) recognized in other expense, net for non-designated foreign currency forward contracts for the three and six months ended June 30, 2014 and 2013 are as follows (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Gain (loss) recognized in other expense, net	$	(6	)	$	(212	)	$	69		$	(191	)

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	'
	The fair value of the Company’s share-based awards was estimated based on the following assumptions:
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Option grants:
	Expected volatility	37	%		42	%		37 - 40%			41 - 43%
	Expected dividends	—			—			—			—
	Expected term of options (in years)	3.5			3.3			3.5			3.3
	Risk-free interest rate	1.3	%		0.6	%		1.1	%		0.6	%
	ESPP: (i)
	Expected volatility	—	%		—	%		36	%		42	%
	Expected dividends	—			—			—			—
	Expected term of ESPP (in years)	—			—			0.5			0.5
	Risk-free interest rate	—	%		—	%		0.1	%		0.1	%
	____________________
	(i)	ESPP purchases are made on the last day of January and July of each year.
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	'
	The allocations of the stock-based compensation, net of estimated income tax benefit, for the three and six months ended June 30, 2014 and 2013 are as follows (in thousands):
		Three Months Ended								Six Months Ended
		June 30,								June 30,
		2014				2013				2014			2013
	Cost of service revenues	$	1,454			$	1,433			$	2,918		$	2,763
	Research and development	5,214				4,978				9,876			9,418
	Sales and marketing	5,137				5,686				9,843			10,375
	General and administrative	3,556				3,752				6,970			6,823
	Total stock-based compensation	15,361				15,849				29,607			29,379
	Estimated tax benefit of stock-based compensation	(4,189		)		(4,312		)		(8,051		)	(7,952		)
	Total stock-based compensation, net of estimated tax benefit	$	11,172			$	11,537			$	21,556		$	21,427
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	'
	A summary of stock option activity through June 30, 2014 is presented below (in thousands, except per share amounts):
					Weighted-				Weighted		Aggregate
					Average				Average		Intrinsic
		Number of			Exercise Price				Remaining		Value
		Shares			Per Share				Contractual
									Term (Years)
	Outstanding at December 31, 2013	9,424			$	29.05			3.48		$	127,697
	Granted	1,298			$	38.14
	Exercised	(1,955	)		$	10.52
	Forfeited or expired	(572	)		$	43.2
	Outstanding at June 30, 2014	8,195			$	33.93			4.31		$	41,010
	Exercisable at June 30, 2014	4,586			$	30.86			3.19		$	37,566
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]	'
	A summary of RSU activity, excluding PRSUs, through June 30, 2014 is presented below (in thousands, except per share amounts):
					Weighted-
					Average
		Number of			Grant Date
		Shares			Fair Value
	Outstanding at December 31, 2013	1,793			—
	Awarded	1,251			$	36.77
	Released	(411	)		$	36
	Forfeited	(123	)		$	39.85
	Outstanding at June 30, 2014	2,510			—
Schedule of Nonvested Performance-based Units Activity [Table Text Block]	'
	A summary of PRSU activity based upon PRSUs granted in 2013, certified and actually achieved through June 30, 2014 is presented below (in thousands):
		Number of
		Shares
	Outstanding at December 31, 2013	—
	Achieved	507
	Released	(122	)
	Forfeited	(41	)
	Outstanding at June 30, 2014	344

Net_Income_per_Common_Share_Ta

Net Income per Common Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]	'
	The following table sets forth the calculation of basic and diluted net income per share for the three and six months ended June 30, 2014 and 2013 (in thousands, except per share amounts):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Net income	$	22,829	$	18,166	$	47,682	$	36,073
	Weighted-average shares of common stock used to compute basic net income per share (excluding unvested restricted stock)	109,739		108,138		109,453		107,904
	Effect of dilutive common stock equivalents:
	Dilutive effect of unvested restricted stock units	559		280		606		301
	Dilutive effect of employee stock options	1,303		2,926		1,711		3,100
	Shares used in computing diluted net income per common share	111,601		111,344		111,770		111,305
	Basic net income per common share	$	0.21	$	0.17	$	0.44	$	0.33
	Diluted net income per common share	$	0.2	$	0.16	$	0.43	$	0.32
	Weighted average stock options and restricted stock units excluded from calculation due to anti-dilutive effect	5,147		6,268		4,900		5,911

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	'
	Future minimum lease payments as of June 30, 2014 under non-cancelable operating leases with original terms in excess of one year are summarized as follows (in thousands):
		Operating
		Leases
	Remaining 2014	$	5,719
	2015	12,104
	2016	8,983
	2017	6,317
	2018	4,988
	Thereafter	12,128
	Total future minimum operating lease payments	$	50,239

Significant_Customer_Informati1

Significant Customer Information and Segment Information (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]	'
	Total revenue by geographic region is summarized as follows (in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Revenues:
	North America	$	159,973	$	145,456	$	313,817	$	288,936
	Europe, the Middle East, and Africa	60,581		53,716		120,783		100,142
	Other	30,159		23,267		59,210		47,661
	Total revenues	$	250,713	$	222,439	$	493,810	$	436,739
	Property and equipment, net by geographic region are summarized as follows (in thousands):
		June 30,		December 31,
		2014		2013
	Property and equipment, net:
	North America	$	146,721	$	147,460
	Europe, the Middle East, and Africa	7,159		4,907
	Other	5,438		4,941
	Total property and equipment, net	$	159,318	$	157,308

Acquisitions_Tables

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2014
StrikeIron [Member]	'
Business Acquisition [Line Items]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	'
	The following table summarizes the fair value of assets acquired and liabilities assumed of $50.5 million and the acquiree's transaction related costs and debt settlement of $4.1 million, which were paid by the Company (in thousands):
	Assumed liabilities, net of assets	$	(3,499	)
	Identifiable intangible assets:
	Developed and core technology	13,900
	Customer relationships	3,500
	Covenants not to compete	450
	Trade names	40
	Total identifiable net assets	14,391
	Goodwill	36,116
	Total assets acquired and liabilities assumed	50,507
	Acquiree's transaction related costs and debt settlement	4,138
	Total	$	54,645
Heiler Software AG [Member]	'
Business Acquisition [Line Items]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	'
	The following table summarizes the fair value of assets acquired and liabilities assumed at the acquisition date (in thousands):
	Net tangible assets	$	16,400
	Identifiable intangible assets:
	Developed and core technology	16,586
	Customer relationships	5,339
	Contract backlog	648
	Trade names	298
	In-process research and development	3,784
	Noncontrolling interest	(2,861		)
	Total identifiable net assets	40,194
	Goodwill	61,660
	Total cash consideration	$	101,854

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Financial Assets and Liabilities at Fair Vaue) (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Cash and Cash Equivalents, Fair Value Disclosure	$257,772,000		'	$257,772,000		'	$297,818,000
Fair Value, Transfers Between Level 1 and Level 2, Description and Policy [Abstract]	'		'	'		'	'
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	0		0	0		0	'
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount	0		0	0		0	'
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount	0		0	0		0	'
Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount	0		0	0		0	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net [Abstract]	'		'	'		'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3	0		0	0		0	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3	0		0	0		0	'
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Total Cash Equivalents and Short-term Investments	445,847,000		'	445,847,000		'	413,862,000
Derivative Asset, Fair Value, Gross Asset	1,853,000	[1]	'	1,853,000	[1]	'	284,000	[1]
Assets, Fair Value Disclosure, Recurring	447,700,000		'	447,700,000		'	414,146,000
Derivative Liability, Fair Value, Gross Liability	0	[2]	'	0	[2]	'	1,024,000	[2]
Business Combination, Contingent Consideration, Liability	0	[2]	'	0	[2]	'	3,071,000	[2]
Liabilities, Fair Value Disclosure, Recurring	0		'	0		'	4,095,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Total Cash Equivalents and Short-term Investments	45,477,000		'	45,477,000		'	43,478,000
Derivative Asset, Fair Value, Gross Asset	0	[1]	'	0	[1]	'	0	[1]
Assets, Fair Value Disclosure, Recurring	45,477,000		'	45,477,000		'	43,478,000
Derivative Liability, Fair Value, Gross Liability	0	[2]	'	0	[2]	'	0	[2]
Business Combination, Contingent Consideration, Liability	0	[2]	'	0	[2]	'	0	[2]
Liabilities, Fair Value Disclosure, Recurring	0		'	0		'	0
Stable net asset value per share of money market funds and time deposits	$1		'	$1		'	$1
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Total Cash Equivalents and Short-term Investments	400,370,000		'	400,370,000		'	370,384,000
Derivative Asset, Fair Value, Gross Asset	1,853,000	[1]	'	1,853,000	[1]	'	284,000	[1]
Assets, Fair Value Disclosure, Recurring	402,223,000		'	402,223,000		'	370,668,000
Derivative Liability, Fair Value, Gross Liability	0	[2]	'	0	[2]	'	1,024,000	[2]
Business Combination, Contingent Consideration, Liability	0	[2]	'	0	[2]	'	0	[2]
Liabilities, Fair Value Disclosure, Recurring	0		'	0		'	1,024,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Total Cash Equivalents and Short-term Investments	0		'	0		'	0
Derivative Asset, Fair Value, Gross Asset	0	[1]	'	0	[1]	'	0	[1]
Assets, Fair Value Disclosure, Recurring	0		'	0		'	0
Derivative Liability, Fair Value, Gross Liability	0	[2]	'	0	[2]	'	0	[2]
Business Combination, Contingent Consideration, Liability	0	[2]	'	0	[2]	'	3,071,000	[2]
Liabilities, Fair Value Disclosure, Recurring	0		'	0		'	3,071,000
Time Deposits [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Other Short-term Investments, Fair Value Disclosure	29,029,000		'	29,029,000		'	21,585,000
Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Other Short-term Investments, Fair Value Disclosure	29,029,000	[3]	'	29,029,000	[3]	'	21,585,000	[3]
Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Other Short-term Investments, Fair Value Disclosure	29,029,000	[3]	'	29,029,000	[3]	'	21,585,000	[3]
Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Other Short-term Investments, Fair Value Disclosure	0	[3]	'	0	[3]	'	0	[3]
Time Deposits [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Other Short-term Investments, Fair Value Disclosure	0	[3]	'	0	[3]	'	0	[3]
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Marketable Debt Securities, Fair Value Disclosure	400,370,000	[3]	'	400,370,000	[3]	'	370,384,000	[3]
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Marketable Debt Securities, Fair Value Disclosure	0	[3]	'	0	[3]	'	0	[3]
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Marketable Debt Securities, Fair Value Disclosure	400,370,000	[3]	'	400,370,000	[3]	'	370,384,000	[3]
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Marketable Debt Securities, Fair Value Disclosure	0	[3]	'	0	[3]	'	0	[3]
Money Market Funds [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Cash and Cash Equivalents, Fair Value Disclosure	16,448,000		'	16,448,000		'	21,893,000
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Cash and Cash Equivalents, Fair Value Disclosure	16,448,000	[4]	'	16,448,000	[4]	'	21,893,000	[4]
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Cash and Cash Equivalents, Fair Value Disclosure	16,448,000	[4]	'	16,448,000	[4]	'	21,893,000	[4]
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Cash and Cash Equivalents, Fair Value Disclosure	0	[4]	'	0	[4]	'	0	[4]
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'		'	'		'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'	'		'	'
Cash and Cash Equivalents, Fair Value Disclosure	$0	[4]	'	$0	[4]	'	$0	[4]
[1]	Included in prepaid expenses and other current assets on the condensed consolidated balance sheets.
[2]	Included in accrued liabilities on the condensed consolidated balance sheets.
[3]	Included in either cash and cash equivalents or short-term investments on the condensed consolidated balance sheets.
[4]	Included in cash and cash equivalents on the condensed consolidated balance sheets.

Summary_of_Significant_Account4

Summary of Significant Accounting Policies (Foreign Currency Derivatives and Hedging Instruments) (Details) (Foreign Exchange Forward [Member], Cash Flow Hedging [Member])	6 Months Ended
	Jun. 30, 2014
Foreign Exchange Forward [Member] | Cash Flow Hedging [Member]	'
Derivative [Line Items]	'
Maximum Remaining Maturity of Foreign Currency Derivatives	'12 months

Summary_of_Significant_Account5

Summary of Significant Accounting Policies (Change in Acquisition-Related Contingent Consideration Liability) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Business Acquisition, Contingent Consideration [Line Items]	'		'
Payment of contingent consideration	($3,061,000)		($2,490,000)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'		'
Business Acquisition, Contingent Consideration [Line Items]	'		'
Beginning balance as of December 31, 2013	3,071,000	[1]	'
Change in fair value of contingent consideration	-10,000		'
Payment of contingent consideration	-3,061,000		'
Ending balance as of June 30, 2014	$0	[1]	'
[1]	Included in accrued liabilities on the condensed consolidated balance sheets.

Cash_Cash_Equivalents_and_Shor2

Cash, Cash Equivalents, and Short-Term Investments (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Cash and cash equivalents, at cost	$257,772	$297,818	$193,048	$190,127
Available-for-sale Securities and Other Short-term Investments, Cost Basis	427,952	379,515	'	'
Cash, Available-for-sale Securities and Other Short-term Investments, Cost Basis	685,724	677,333	'	'
Available-for-sale Securities, Gross Unrealized Gain	619	404	'	'
Available-for-sale Securities, Gross Unrealized Losses	-172	-303	'	'
Cash and Cash Equivalents, Fair Value Disclosure	257,772	297,818	'	'
Total Short-term Investments, Fair Value Disclosure	428,399	379,616	'	'
Total Cash, Cash Equivalents, and Short-term Investments, Estimated Fair Value	686,171	677,434	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	118,696	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-167	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,494	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses Accumulated in Investments	-5	'	'	'
Certificates of Deposit [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Available-for-sale Securities, Amortized Cost Basis	1,920	960	'	'
Available-for-sale Securities, Gross Unrealized Gain	0	0	'	'
Available-for-sale Securities, Gross Unrealized Losses	0	0	'	'
Available-for-sale Securities, Estimated Fair Value	1,920	960	'	'
Commercial Paper, not Included with Cash and Cash Equivalents [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Available-for-sale Securities, Amortized Cost Basis	3,999	12,738	'	'
Available-for-sale Securities, Gross Unrealized Gain	0	0	'	'
Available-for-sale Securities, Gross Unrealized Losses	0	0	'	'
Available-for-sale Securities, Estimated Fair Value	3,999	12,738	'	'
Corporate Notes and Bonds [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Available-for-sale Securities, Amortized Cost Basis	214,083	175,446	'	'
Available-for-sale Securities, Gross Unrealized Gain	334	220	'	'
Available-for-sale Securities, Gross Unrealized Losses	-129	-220	'	'
Available-for-sale Securities, Estimated Fair Value	214,288	175,446	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	64,942	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-129	'	'	'
Federal agency notes and bonds [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Available-for-sale Securities, Amortized Cost Basis	71,017	64,863	'	'
Available-for-sale Securities, Gross Unrealized Gain	11	31	'	'
Available-for-sale Securities, Gross Unrealized Losses	-41	-69	'	'
Available-for-sale Securities, Estimated Fair Value	70,987	64,825	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	48,965	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-36	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,494	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses Accumulated in Investments	-5	'	'	'
Time Deposits [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Other Short-term Investments, Cost Basis	29,029	21,585	'	'
Other Short-term Investments, Estimated Fair Value	29,029	21,585	'	'
Municipal Notes and Bonds [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Available-for-sale Securities, Amortized Cost Basis	107,904	103,923	'	'
Available-for-sale Securities, Gross Unrealized Gain	274	153	'	'
Available-for-sale Securities, Gross Unrealized Losses	-2	-14	'	'
Available-for-sale Securities, Estimated Fair Value	108,176	104,062	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]	'	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,789	'	'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	-2	'	'	'
Cash [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Cash and cash equivalents, at cost	240,324	263,572	'	'
Cash and Cash Equivalents, Fair Value Disclosure	240,324	263,572	'	'
Cash Equivalents [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Cash and cash equivalents, at cost	17,448	34,246	'	'
Cash and Cash Equivalents, Fair Value Disclosure	17,448	34,246	'	'
Money Market Funds [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Cash and cash equivalents, at cost	16,448	21,893	'	'
Cash and Cash Equivalents, Fair Value Disclosure	16,448	21,893	'	'
Municipal Notes and Bonds [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Cash and cash equivalents, at cost	1,000	'	'	'
Cash and Cash Equivalents, Fair Value Disclosure	1,000	'	'	'
U.S. Government Notes and Bonds [Member]	'	'	'	'
Schedule of Cash, Cash Equivalents, and Short-term Investments [Line Items]	'	'	'	'
Cash and cash equivalents, at cost	'	12,353	'	'
Cash and Cash Equivalents, Fair Value Disclosure	'	$12,353	'	'

Cash_Cash_Equivalents_and_Shor3

Cash, Cash Equivalents, and Short-Term Investments (Short-term Investment Maturities) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Cash, Cash Equivalents, and Short-term Investments [Abstract]	'	'
Short-term Investments Maturities, Due within One Year, Cost Basis	$176,842	'
Short-term Investments Maturities, Due within One Year, Fair Value	176,983	'
Available-for-sale Securities, Debt Maturities, Due in One Year to Two Years, Amortized Cost Basis	171,471	'
Available-for-sale Securities, Debt Maturities, Due in One Year to Two Years, Fair Value	171,781	'
Available-for-sale Securities, Debt Maturities, Due after Two Years, Amortized Cost Basis	79,639	'
Available-for-sale Securities, Debt Maturities, Due after Two Years, Fair Value	79,635	'
Short-term Investments Maturities, Total Cost Basis	427,952	379,515
Total Short-term Investments, Fair Value Disclosure	$428,399	$379,616

Intangible_Assets_and_Goodwill2

Intangible Assets and Goodwill (Intangible Assets) (Details) (USD $)	3 Months Ended			6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets, Net [Abstract]	'		'	'		'	'
Finite-Lived Intangible Assets, Gross	$207,522		'	$207,522		'	$189,632
Finite-Lived Intangible Assets, Accumulated Amortization	-158,198		'	-158,198		'	-148,007
Finite-Lived Intangible Assets, Net	49,324		'	49,324		'	41,625
Amortization of intangible assets and acquired technology	4,670		7,621	10,191		15,333	'
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]	'		'	'		'	'
Remaining 2014	8,884		'	8,884		'	'
2015	14,012		'	14,012		'	'
2016	10,710		'	10,710		'	'
2017	7,468		'	7,468		'	'
2018	5,021		'	5,021		'	'
Thereafter	3,229		'	3,229		'	'
Finite-Lived Intangible Assets, Net	49,324		'	49,324		'	41,625
Developed and Core Technology [Member]	'		'	'		'	'
Finite-Lived Intangible Assets, Net [Abstract]	'		'	'		'	'
Finite-Lived Intangible Assets, Gross	144,643		'	144,643		'	130,744
Finite-Lived Intangible Assets, Accumulated Amortization	-106,297		'	-106,297		'	-99,026
Finite-Lived Intangible Assets, Net	38,346		'	38,346		'	31,718
Finite-Lived Intangible Asset, Useful Life	'		'	'6 years		'	'
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]	'		'	'		'	'
Remaining 2014	5,861		'	5,861		'	'
2015	9,998		'	9,998		'	'
2016	8,550		'	8,550		'	'
2017	6,605		'	6,605		'	'
2018	4,582		'	4,582		'	'
Thereafter	2,750		'	2,750		'	'
Finite-Lived Intangible Assets, Net	38,346		'	38,346		'	31,718
Other Finite-Lived Intangible Assets [Member]	'		'	'		'	'
Finite-Lived Intangible Assets, Net [Abstract]	'		'	'		'	'
Finite-Lived Intangible Assets, Gross	62,879		'	62,879		'	58,888
Finite-Lived Intangible Assets, Accumulated Amortization	-51,901		'	-51,901		'	-48,981
Finite-Lived Intangible Assets, Net	10,978		'	10,978		'	9,907
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]	'		'	'		'	'
Remaining 2014	3,023		'	3,023		'	'
2015	4,014		'	4,014		'	'
2016	2,160		'	2,160		'	'
2017	863		'	863		'	'
2018	439		'	439		'	'
Thereafter	479		'	479		'	'
Finite-Lived Intangible Assets, Net	10,978		'	10,978		'	9,907
Customer Relationships [Member]	'		'	'		'	'
Finite-Lived Intangible Assets, Net [Abstract]	'		'	'		'	'
Finite-Lived Intangible Assets, Gross	45,183		'	45,183		'	41,683
Finite-Lived Intangible Assets, Accumulated Amortization	-37,083		'	-37,083		'	-35,216
Finite-Lived Intangible Assets, Net	8,100		'	8,100		'	6,467
Finite-Lived Intangible Asset, Useful Life	'		'	'5 years		'	'
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]	'		'	'		'	'
Finite-Lived Intangible Assets, Net	8,100		'	8,100		'	6,467
Other Intangible Assets (Excluding Developed Technology Rights and Customer Relationships) [Member]	'		'	'		'	'
Finite-Lived Intangible Assets, Net [Abstract]	'		'	'		'	'
Finite-Lived Intangible Assets, Gross	17,696	[1]	'	17,696	[1]	'	17,205	[1]
Finite-Lived Intangible Assets, Accumulated Amortization	-14,818	[1]	'	-14,818	[1]	'	-13,765	[1]
Finite-Lived Intangible Assets, Net	2,878	[1]	'	2,878	[1]	'	3,440	[1]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]	'		'	'		'	'
Finite-Lived Intangible Assets, Net	$2,878	[1]	'	$2,878	[1]	'	$3,440	[1]
Other Intangible Assets (Excluding Developed Technology Rights and Customer Relationships) [Member] | Minimum [Member]	'		'	'		'	'
Finite-Lived Intangible Assets, Net [Abstract]	'		'	'		'	'
Finite-Lived Intangible Asset, Useful Life	'		'	'4 years		'	'
Other Intangible Assets (Excluding Developed Technology Rights and Customer Relationships) [Member] | Maximum [Member]	'		'	'		'	'
Finite-Lived Intangible Assets, Net [Abstract]	'		'	'		'	'
Finite-Lived Intangible Asset, Useful Life	'		'	'11 years		'	'
[1]	All other includes vendor relationships, trade names, covenants not to compete, and patents.

Intangible_Assets_and_Goodwill3

Intangible Assets and Goodwill (Goodwill) (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Goodwill [Roll Forward]	'
Beginning balance as of December 31, 2013	$523,142
Goodwill from acquisition	36,116
Subsequent goodwill adjustments	-265
Ending balance as of June 30, 2014	$558,993

Borrowings_Credit_Agreement_De

Borrowings (Credit Agreement) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Line of Credit Facility [Line Items]	'
Line of Credit Facility, Initiation Date	29-Sep-10
Line of Credit Facility, Expiration Date	29-Sep-14
Total Unsecured Revolving Credit Facility	$220,000,000
Option to request additional commitments on credit facility	30,000,000
Line of Credit Facility, Maximum Borrowing Capacity	250,000,000
Line of Credit Facility, Amount Outstanding	0
Line of Credit Facility, Remaining Borrowing Capacity	$220,000,000
Line of Credit Facility, Covenant Compliance	'The Company was in compliance with all covenants under the Credit Agreement as of June 30, 2014.
Minimum [Member]	'
Line of Credit Facility [Line Items]	'
Line of Credit Facility, Commitment Fee Percentage	0.35%
Maximum [Member]	'
Line of Credit Facility [Line Items]	'
Line of Credit Facility, Commitment Fee Percentage	0.50%
Line of Credit [Member]	'
Line of Credit Facility [Line Items]	'
Maximum Consolidated Leverage Ratio	2.75
Minimum Consolidated Interest Coverage Ratio	3.5
Debt Instrument, Additional Interest Margin for Overdue Principal, Stated Percentage	2.00%
Debt Instrument, Additional Interest Margin for Other Overdue Amounts, Stated Percentage	2.00%
Line of Credit [Member] | Base Rate Loan [Member]	'
Line of Credit Facility [Line Items]	'
Line of Credit, Frequency of Interest Payment	'3 months
Line of Credit [Member] | Base Rate Loan [Member] | Base Rate (i) [Member]	'
Line of Credit Facility [Line Items]	'
Line of Credit Facility, Base Interest Rate Description	'JPMorgan Chase Bank, N.A.'s prime rate
Line of Credit [Member] | Base Rate Loan [Member] | Base Rate (ii) [Member]	'
Line of Credit Facility [Line Items]	'
Line of Credit Facility, Base Interest Rate Description	'the federal funds rate plus a margin
Debt Instrument, Basis Spread on Variable Rate	0.50%
Line of Credit [Member] | Base Rate Loan [Member] | Base Rate (iii) [Member]	'
Line of Credit Facility [Line Items]	'
Line of Credit Facility, Base Interest Rate Description	'LIBOR for a 1-month interest period plus a margin
Maturity of Reference Rate, 1-Month LIBOR	'1 month
Debt Instrument, Basis Spread on Variable Rate	1.00%
Line of Credit [Member] | Base Rate Loan [Member] | Minimum [Member]	'
Line of Credit Facility [Line Items]	'
Debt Instrument, Basis Spread on Variable Rate	1.00%
Line of Credit [Member] | Base Rate Loan [Member] | Maximum [Member]	'
Line of Credit Facility [Line Items]	'
Debt Instrument, Basis Spread on Variable Rate	1.75%
Line of Credit [Member] | LIBOR Based Loan [Member]	'
Line of Credit Facility [Line Items]	'
Line of Credit Facility, Reference Rate (LIBOR) Description	'1-, 2-, 3-, or 6-month
Line of Credit [Member] | LIBOR Based Loan [Member] | Minimum [Member]	'
Line of Credit Facility [Line Items]	'
Debt Instrument, Basis Spread on Variable Rate	2.00%
Line of Credit, Frequency of Interest Payment	'1 month
Line of Credit [Member] | LIBOR Based Loan [Member] | Maximum [Member]	'
Line of Credit Facility [Line Items]	'
Debt Instrument, Basis Spread on Variable Rate	2.75%
Line of Credit, Frequency of Interest Payment	'3 months

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Loss) (Accumulated Other Comprehensive Income (Loss), Net of Tax) (Details) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'		'		'
Accumulated other comprehensive income (loss) at beginning of period	($1,353,000)		($14,899,000)		($3,212,000)		($8,030,000)		'
Other comprehensive income (loss):	'		'		'		'		'
Other comprehensive income (loss), before reclassifications, net of tax	219,000		-1,033,000		1,779,000		-7,903,000		'
Reclassification for net (gain) loss from accumulated other comprehensive income (loss), current period, net of tax	-170,000		96,000		129,000		97,000		'
Other comprehensive income (loss), net of tax effect	49,000		-937,000		1,908,000		-7,806,000		'
Accumulated other comprehensive income (loss), at end of period	-1,304,000		-15,836,000		-1,304,000		-15,836,000		'
Other Comprehensive Income (Loss), Tax [Abstract]	'		'		'		'		'
Tax benefit (expense) related to foreign currency translation adjustment	-118,000		-60,000		-279,000		243,000		'
Cumulative translation reclassification adjustment, no tax effect	0		0		0		0		'
Tax benefit (expense) related to available-for-sale investments, before reclassification adjustments	-77,000		326,000		-134,000		370,000		'
Tax benefit (expense) of reclassification adjustment for sale of securities included in net income	-1,000		7,000		-2,000		10,000		'
Tax benefit (expense) related to unrealized gain (loss) on cash flow hedges arising during the period	-250,000		797,000		-800,000		694,000		'
Tax benefit (expense) of reclassification adjustment on cash flow hedges included in net income	-104,000		51,000		81,000		49,000		'
Other-than-temporary gain or loss reflected in accumulated other comprehensive income (loss)	0		'		0		'		0
Accumulated Translation Adjustment [Member]	'		'		'		'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'		'		'
Accumulated other comprehensive income (loss) at beginning of period	-2,310,000		-14,980,000		-2,879,000		-8,012,000		'
Other comprehensive income (loss):	'		'		'		'		'
Other comprehensive income (loss), before reclassifications, net of tax	-312,000		800,000		257,000		-6,168,000		'
Reclassification for net (gain) loss from accumulated other comprehensive income (loss), current period, net of tax	0		0		0		0		'
Other comprehensive income (loss), net of tax effect	-312,000		800,000		257,000		-6,168,000		'
Accumulated other comprehensive income (loss), at end of period	-2,622,000		-14,180,000		-2,622,000		-14,180,000		'
Accumulated Net Unrealized Investment Gain (Loss) [Member]	'		'		'		'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'		'		'
Accumulated other comprehensive income (loss) at beginning of period	154,000		175,000		63,000		242,000		'
Other comprehensive income (loss):	'		'		'		'		'
Other comprehensive income (loss), before reclassifications, net of tax	125,000		-533,000		218,000		-604,000		'
Reclassification for net (gain) loss from accumulated other comprehensive income (loss), current period, net of tax	-2,000	[1]	13,000	[2]	-4,000	[3]	17,000	[4]	'
Other comprehensive income (loss), net of tax effect	123,000	[5]	-520,000	[6]	214,000	[6]	-587,000	[7]	'
Accumulated other comprehensive income (loss), at end of period	277,000		-345,000		277,000		-345,000		'
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'		'		'		'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'		'		'
Accumulated other comprehensive income (loss) at beginning of period	803,000		-94,000		-396,000		-260,000		'
Other comprehensive income (loss):	'		'		'		'		'
Other comprehensive income (loss), before reclassifications, net of tax	406,000		-1,300,000		1,304,000		-1,131,000		'
Reclassification for net (gain) loss from accumulated other comprehensive income (loss), current period, net of tax	-168,000	[8]	83,000	[9]	133,000	[10]	80,000	[11]	'
Other comprehensive income (loss), net of tax effect	238,000	[5]	-1,217,000	[6]	1,437,000	[6]	-1,051,000	[7]	'
Accumulated other comprehensive income (loss), at end of period	$1,041,000		($1,311,000)		$1,041,000		($1,311,000)		'
[1]	The before-tax gain of $3 was included in other expense, net on the condensed consolidated statements of income.
[2]	The before-tax loss of $20 was included in other expense, net on the condensed consolidated statements of income.
[3]	The before-tax gain of $6 was included in other expense, net on the condensed consolidated statements of income.
[4]	The before-tax loss of $27 was included in other expense, net on the condensed consolidated statements of income.
[5]	The tax expense was included in income tax provision on the condensed consolidated statements of income.
[6]	The tax benefit (expense) was included in income tax provision on the condensed consolidated statements of income.
[7]	The tax benefit was included in income tax provision on the condensed consolidated statements of income.
[8]	The before-tax gain of $66 and $206 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
[9]	The before-tax losses of $31 and $103 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
[10]	The before-tax losses of $54 and $160 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
[11]	The before-tax losses of $31 and $98 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Loss) (Reclassification out of Accumulated Other Comprehensive Income) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Other expense, net	$198		$391		$282		$459
Cost of service revenues	43,343		36,463		83,572		72,493
Operating expenses	167,808		151,923		326,755		297,628
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]	'		'		'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Other expense, net	-3	[1]	20	[2]	-6	[3]	27	[4]
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]	'		'		'		'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'		'		'
Cost of service revenues	-66	[5]	31	[6]	54	[7]	31	[8]
Operating expenses	($206)	[5]	$103	[6]	$160	[7]	$98	[8]
[1]	The before-tax gain of $3 was included in other expense, net on the condensed consolidated statements of income.
[2]	The before-tax loss of $20 was included in other expense, net on the condensed consolidated statements of income.
[3]	The before-tax gain of $6 was included in other expense, net on the condensed consolidated statements of income.
[4]	The before-tax loss of $27 was included in other expense, net on the condensed consolidated statements of income.
[5]	The before-tax gain of $66 and $206 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
[6]	The before-tax losses of $31 and $103 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
[7]	The before-tax losses of $54 and $160 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.
[8]	The before-tax losses of $31 and $98 were included in cost of service revenues and operating expenses, primarily research and development expense, respectively on the condensed consolidated statements of income.

Derivative_Financial_Instrumen3

Derivative Financial Instruments (Fair Value) (Details) (Foreign Exchange Forward [Member], USD $)

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Designated as Hedging Instrument [Member]

Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Long [Member]

Long [Member]

Long [Member]

Long [Member]

Derivatives, Fair Value [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Maximum Remaining Maturity of Foreign Currency Derivatives

'

'

'12 months

'

'

'

'

'

'

'

'

Derivatives, Notional Amount

'

'

'

$25,500,000

$30,100,000

'

'

'

'

$2,700,000

$2,600,000

Derivative Asset, Fair Value, Gross Asset

1,853,000

[1]

284,000

[1]

'

'

'

1,658,000

[1]

284,000

[1]

195,000

[1]

0

[1]

'

'

Derivative Liability, Fair Value, Gross Liability

$0

[2]

$1,024,000

[2]

'

'

'

$0

[2]

$830,000

[2]

$0

[2]

$194,000

[2]

'

'

[1]

Included in prepaid expenses and other current assets on the condensed consolidated balance sheets.

[2]

Included in accrued liabilities on the condensed consolidated balance sheets.

Derivative_Financial_Instrumen4

Derivative Financial Instruments (Offsetting of Derivative Assets) (Details) (Foreign Exchange Forward [Member], USD $)	Jun. 30, 2014		Dec. 31, 2013
Foreign Exchange Forward [Member]	'		'
Offsetting Assets [Line Items]	'		'
Derivative Asset, Fair Value, Gross Asset	$1,853,000	[1]	$284,000	[1]
Derivative Asset, Fair Value, Gross Liability	'		0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	'		284,000
Derivative, Collateral, Obligation to Return Securities	'		-268,000	[2]
Derivative, Collateral, Obligation to Return Cash	'		0
Derivative Asset, Fair Value, Amount Offset Against Collateral	'		$16,000
[1]	Included in prepaid expenses and other current assets on the condensed consolidated balance sheets.
[2]	The balances at December 31, 2013 were related to derivative liabilities which are allowed to be net settled against derivative assets in accordance with the master netting agreements.

Derivative_Financial_Instrumen5

Derivative Financial Instruments (Offsetting of Derivative Liabilities) (Details) (Foreign Exchange Forward [Member], USD $)	Jun. 30, 2014		Dec. 31, 2013
Foreign Exchange Forward [Member]	'		'
Offsetting Liabilities [Line Items]	'		'
Derivative Liability, Fair Value, Gross Liability	$0	[1]	$1,024,000	[1]
Derivative Liability, Fair Value, Gross Asset	'		0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	'		1,024,000
Derivative, Collateral, Right to Reclaim Securities	'		-268,000	[2]
Derivative, Collateral, Right to Reclaim Cash	'		0
Derivative Liability, Fair Value, Amount Offset Against Collateral	'		$756,000
[1]	Included in accrued liabilities on the condensed consolidated balance sheets.
[2]	The balances at December 31, 2013 were related to derivative assets which are allowed to be net settled against derivative liabilities in accordance with the master netting agreements.

Derivative_Financial_Instrumen6

Derivative Financial Instruments (Effects on the Accumulated Other Comprehensive Income and Condensed Consolidated Statements of Income) (Details) (Foreign Exchange Forward [Member], Cash Flow Hedging [Member], USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Designated as Hedging Instrument [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Amount of gain (loss) recognized in other comprehensive income (effective portion)	$656,000	($2,097,000)	$2,104,000	($1,825,000)
Amount of gain (loss) reclassified from accumulated other comprehensive income to cost of service revenues and operating expenses (effective portion)	272,000	-134,000	-214,000	-129,000
Amount of gain recognized in income on derivatives for the amount excluded from effectiveness testing located in operating expenses	0	507,000	0	577,000
Not Designated as Hedging Instrument [Member]	'	'	'	'
Derivative, Gain (Loss) on Derivative, Net [Abstract]	'	'	'	'
Gain (loss) recognized in other expense, net	($6,000)	($212,000)	$69,000	($191,000)

Stock_Repurchase_Program_Detai

Stock Repurchase Program (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jan. 31, 2014	Jul. 31, 2014
						Subsequent Event [Member]
Class of Stock [Line Items]	'	'	'	'	'	'
Stock Repurchase Program, Additional Authorized Repurchase Amount	'	'	'	'	$100	$100
Stock Repurchased and Retired During Period, Shares	896	594	1,478	1,204	'	'
Stock Repurchased and Retired During Period, Value	32.5	21	55.9	43	'	'
Stock Repurchase Program, Remaining Amount Authorized to be Repurchased	'	'	$48.10	'	'	'

StockBased_Compensation_Valuat

Stock-Based Compensation (Valuation Assumptions) (Details)	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Option Grants [Member]	'		'		'		'
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]	'		'		'		'
Expected volatility rate	37.00%		42.00%		'		'
Expected volatility rate, minimum	'		'		37.00%		41.00%
Expected volatility rate, maximum	'		'		40.00%		43.00%
Expected dividends	0.00%		0.00%		0.00%		0.00%
Expected term	'3 years 5 months 19 days		'3 years 4 months 4 days		'3 years 5 months 19 days		'3 years 4 months 4 days
Risk-free interest rate	1.30%		0.60%		1.10%		0.60%
Employee Stock Purchase Plan [Member]	'		'		'		'
Share-based Compensation Arrangement By Share-based Payment Award [Line Items]	'		'		'		'
Expected volatility rate	0.00%	[1]	0.00%	[1]	36.00%	[1]	42.00%	[1]
Expected dividends	0.00%	[1]	0.00%	[1]	0.00%	[1]	0.00%	[1]
Expected term	'0 months	[1]	'0 months	[1]	'6 months	[1]	'6 months	[1]
Risk-free interest rate	0.00%	[1]	0.00%	[1]	0.10%	[1]	0.10%	[1]
[1]	ESPP purchases are made on the last day of January and July of each year.

StockBased_Compensation_Alloca

Stock-Based Compensation (Allocation of Stock-Based Compensation Expense) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	$15,361	$15,849	$29,607	$29,379
Estimated tax benefit of stock-based compensation	-4,189	-4,312	-8,051	-7,952
Total stock-based compensation, net of estimated tax benefit	11,172	11,537	21,556	21,427
Cost of service revenues [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	1,454	1,433	2,918	2,763
Research and development [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	5,214	4,978	9,876	9,418
Sales and marketing [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	5,137	5,686	9,843	10,375
General and administrative [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total stock-based compensation	$3,556	$3,752	$6,970	$6,823

StockBased_Compensation_Stock_

Stock-Based Compensation (Stock Option Activity) (Details) (USD $)	6 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'
Number of options outstanding at December 31, 2013	9,424	'
Grants in period, gross	1,298	'
Exercises in period	-1,955	'
Forfeitures and expirations in period	-572	'
Number of options outstanding at June 30, 2014	8,195	9,424
Number of options exercisable at June 30, 2014	4,586	'
Weighted average exercise price per share of outstanding option at December 31, 2013	$29.05	'
Grants in period, weighted average exercise price	$38.14	'
Exercises in period, weighted average exercise price	$10.52	'
Forfeitures and expirations in period, weighted average exercise price	$43.20	'
Weighted average exercise price per share of outstanding option at June 30, 2014	$33.93	$29.05
Exercisable options, weighted average exercise price at June 30, 2014	$30.86	'
Weighted average remaining contractual term of outstanding options at December 31, 2013	'4 years 3 months 22 days	'3 years 5 months 23 days
Weighted average remaining contractual term of outstanding options at June 30, 2014	'4 years 3 months 22 days	'3 years 5 months 23 days
Weighted average remaining contractual term of options exercisable at June 30, 2014	'3 years 2 months 8 days	'
Aggregate intrinsic value of options outstanding at December 31, 2013	$127,697	'
Aggregate intrinsic value of options outstanding at June 30, 2014	41,010	127,697
Aggregate intrinsic value of options exercisable at June 30, 2014	$37,566	'

StockBased_Compensation_Restri

Stock-Based Compensation (Restricted Stock Unit Activity) (Details) (Restricted Stock Units (RSUs) [Member], USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Restricted Stock Units (RSUs) [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of RSUs outstanding at December 31, 2013	1,793
Number of shares awarded	1,251
Number of shares released	-411
Number of shares forfeited	-123
Number of RSUs outstanding at June 30, 2014	2,510
RSUs awarded in period, weighted average grant date fair value	$36.77
RSUs released in period, weighted average grant date fair value	$36
RSUs forfeited in period, weighted average grant date fair value	$39.85

StockBased_Compensation_Perfor

Stock-Based Compensation (Performance Restricted Share Activity) (Details) (Performance Shares [Member], USD $)	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Prior Performance Period [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Target number of shares awarded	'	'	649,900
Award vesting period	'4 years	'	'
Weighted average grant date fair value per share	$37.42	'	'
Performance-Based Restricted Stock Unit Activity [Roll Forward]	'	'	'
Number of shares outstanding at beginning of period	0	0	'
Number of shares achieved	'	507,000	'
Number of shares released	'	-122,000	'
Number of shares forfeited	'	-41,000	'
Number of shares outstanding at end of period	'	344,000	0
Current Performance Period [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Target number of shares awarded	224,000	'	'
Weighted average grant date fair value per share	$38.25	'	'
Minimum [Member] | Current Performance Period [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Award vesting period	'2 years	'	'
Maximum [Member] | Current Performance Period [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Award vesting period	'4 years	'	'
Current Year Award Recipients, Group One [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Maximum percentage of target number of shares eligible to receive	125.00%	'	'
Current Year Award Recipients, Group Two [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Maximum percentage of target number of shares eligible to receive	150.00%	'	'

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Taxes [Line Items]	'	'	'	'
Effective Income Tax Rate Reconciliation, Percent	34.00%	31.00%	34.00%	30.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	35.00%	35.00%	35.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$26.60	$19.20	$26.60	$19.20
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	3.7	2.6	3.7	2.6
Unrecognized Tax Benefits	$29.90	'	$29.90	'
State and Local Jurisdiction, and Foreign Tax Authority [Member] | Minimum [Member]	'	'	'	'
Income Taxes [Line Items]	'	'	'	'
Open Tax Years	'	'	'3 years	'
State and Local Jurisdiction, and Foreign Tax Authority [Member] | Maximum [Member]	'	'	'	'
Income Taxes [Line Items]	'	'	'	'
Open Tax Years	'	'	'6 years	'

Net_Income_per_Common_Share_De

Net Income per Common Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income	$22,829	$18,166	$47,682	$36,073
Weighted-average shares of common stock used to compute basic net income per share (excluding unvested restricted stock)	109,739	108,138	109,453	107,904
Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract]	'	'	'	'
Shares used in computing diluted net income per common share	111,601	111,344	111,770	111,305
Basic net income per common share	$0.21	$0.17	$0.44	$0.33
Diluted net income per common share	$0.20	$0.16	$0.43	$0.32
Weighted average stock options and restricted stock units excluded from calculation due to anti-dilutive effect	5,147	6,268	4,900	5,911
Restricted Stock Units (RSUs) [Member]	'	'	'	'
Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract]	'	'	'	'
Dilutive effect of incremental common shares	559	280	606	301
Option Grants [Member]	'	'	'	'
Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract]	'	'	'	'
Dilutive effect of incremental common shares	1,303	2,926	1,711	3,100

Commitments_and_Contingencies_1

Commitments and Contingencies (Lease Commitments) (Details) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Commitments and Contingencies Disclosure [Abstract]	'
Operating Leases, Future Minimum Payments Due, Remaining 2014	$5,719
Operating Leases, Future Minimum Payments, Due in 2015	12,104
Operating Leases, Future Minimum Payments, Due in 2016	8,983
Operating Leases, Future Minimum Payments, Due in 2017	6,317
Operating Leases, Future Minimum Payments, Due in 2018	4,988
Operating Leases, Future Minimum Payments, Due Thereafter	12,128
Operating Leases, Total Future Minimum Payments Due	$50,239

Commitments_and_Contingencies_2

Commitments and Contingencies (Warranty Accrual) (Details)	6 Months Ended
	Jun. 30, 2014
Minimum [Member]	'
Product Liability Contingency [Line Items]	'
Product Warranty Period	'3 months
Maximum [Member]	'
Product Liability Contingency [Line Items]	'
Product Warranty Period	'6 months

Significant_Customer_Informati2

Significant Customer Information and Segment Information (Revenues) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenues	$250,713	$222,439	$493,810	$436,739
North America [Member]	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenues	159,973	145,456	313,817	288,936
Outside North America [Member] | Sales [Member]	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Portion of International Revenues to Consolidated Revenues	36.00%	35.00%	36.00%	34.00%
EMEA [Member]	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenues	60,581	53,716	120,783	100,142
Other [Member]	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'
Total revenues	$30,159	$23,267	$59,210	$47,661

Significant_Customer_Informati3

Significant Customer Information and Segment Information (Long-Lived Assets) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	$159,318	$157,308
North America [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	146,721	147,460
EMEA [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	7,159	4,907
Other [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	$5,438	$4,941

Significant_Customer_Informati4

Significant Customer Information and Segment Information (Additional Information) (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
	segment	customers	customers	segment	segment
	customers	segment	segment	customers	customers
Segment Reporting Information [Line Items]	'	'	'	'	'
Number of Reportable Segments	1	1	1	1	1
Number of Customers with More Than Ten Percent of Revenues	0	0	0	0	'
Number of Customers with More Than Ten Percent of Accounts Receivable	0	'	0	'	0

Acquisitions_Details

Acquisitions (Details)

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Feb. 28, 2013

Nov. 30, 2012

Mar. 31, 2013

Jun. 30, 2013

Dec. 31, 2012

Nov. 30, 2012

Nov. 30, 2012

Nov. 30, 2012

Nov. 30, 2012

Nov. 30, 2012

Nov. 30, 2012

USD ($)

USD ($)

StrikeIron [Member]

StrikeIron [Member]

StrikeIron [Member]

StrikeIron [Member]

StrikeIron [Member]

Active Endpoints [Member]

Heiler Software AG [Member]

Heiler Software AG [Member]

Heiler Software AG [Member]

Heiler Software AG [Member]

Heiler Software AG [Member]

Heiler Software AG [Member]

Heiler Software AG [Member]

Heiler Software AG [Member]

Heiler Software AG [Member]

Heiler Software AG [Member]

USD ($)

Developed and Core Technology [Member]

Customer Relationships [Member]

Noncompete Agreements [Member]

Trade Names [Member]

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

In-Process Research And Development [Member]

Developed and Core Technology [Member]

Customer Relationships [Member]

Contract Backlog [Member]

Trade Names [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Business Combination, Consideration Transferred [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments to Acquire Businesses, Gross

'

'

'

'

'

'

'

$10,000,000

$101,900,000

'

'

'

'

'

'

'

'

'

Amount of Consideration Placed into Escrow

'

'

8,300,000

'

'

'

'

1,500,000

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net tangible assets acquired and (liabilities assumed)

'

'

-3,499,000

'

'

'

'

-900,000

16,400,000

'

'

'

'

'

'

'

'

'

Finite-lived intangibles

'

'

'

13,900,000

3,500,000

450,000

40,000

'

'

'

'

'

'

'

16,586,000

5,339,000

648,000

298,000

In-process research and development

'

'

'

'

'

'

'

'

'

'

'

'

'

3,784,000

'

'

'

'

Intangible assets, other than goodwill

'

'

'

'

'

'

'

3,800,000

'

'

'

'

'

'

'

'

'

'

Total identifiable net assets

'

'

14,391,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling interest

'

'

'

'

'

'

'

'

-2,861,000

'

'

'

'

'

'

'

'

'

Total identifiable net assets, less noncontrolling interest

'

'

'

'

'

'

'

'

40,194,000

'

'

'

'

'

'

'

'

'

Goodwill

558,993,000

523,142,000

36,116,000

'

'

'

'

7,100,000

61,660,000

'

'

'

'

'

'

'

'

'

Total assets acquired and liabilities assumed

'

'

50,507,000

'

'

'

'

10,000,000

'

'

'

'

'

'

'

'

'

'

Total Cash Consideration or Recognized Assets Acquired and Liabilities Assumed, Less Noncontrolling Interest

'

'

'

'

'

'

'

'

101,854,000

'

'

'

'

'

'

'

'

'

Acquiree's transaction related costs and debt settlement

'

'

4,138,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total Consideration

'

'

54,645,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill, expected tax deductible amount

'

'

0

'

'

'

'

0

0

'

'

'

'

'

'

'

'

'

Goodwill, Purchase Accounting Adjustments

'

'

'

'

'

'

'

'

'

2,800,000

'

'

'

'

'

'

'

'

Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business acquisition, share price

'

'

'

'

'

'

'

'

'

'

'

'

€ 7.04

'

'

'

'

'

Equity interest in acquiree, including subsequent acquisition, percentage

'

'

'

'

'

'

'

'

'

'

100.00%

97.70%

'

'

'

'

'

'

Purchase of equity interest in acquiree for step acquisition

'

'

'

'

'

'

'

'

'

'

6,800,000

'

'

'

'

'

'

'

Total cash consideration and purchase of equity interest in acquiree for step acquisition

'

'

'

'

'

'

'

'

'

'

$108,700,000

'

'

'

'

'

'

'