This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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- Definition

Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

No definition available.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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- Definition

Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References

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-Paragraph 10A

-Subparagraph (a)

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-Paragraph 20

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- Definition

Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

+ References

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-Topic 505

-SubTopic 10

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-Paragraph 2

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References

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- Definition

Number of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.

+ References

No definition available.

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- Definition

Value of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.

+ References

No definition available.

+ Details

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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Consolidated Statement Of Shareholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2011	$ 344	$ 676,652	$ (304,426)	$ 671,459	$ 197	$ 1,044,226us-gaap_StockholdersEquity
Balance, Shares at Dec. 31, 2011	34,357		3,105
Stock-based compensation		66,274				66,274
Stock plan transactions and other	5	476				481
Stock plan transactions and other, Shares	555
Excess tax benefit on stock-based compensation		73,210				73,210
Acquisition of treasury stock (value)			(217,092)			(217,092)
Acquisition of treasury stock (shares)			714
Net income				278,000		278,000us-gaap_NetIncomeLoss
Foreign currency translation adjustment					827	827
Balance at Dec. 31, 2012	349	816,612	(521,518)	949,459	1,024	1,245,926us-gaap_StockholdersEquity
Balance, Shares at Dec. 31, 2012	34,912		3,819
Stock-based compensation		64,781				64,781
Stock plan transactions and other	3	97				100
Stock plan transactions and other, Shares	333
Excess tax benefit on stock-based compensation		38,350				38,350
Acquisition of treasury stock (value)			(138,903)			(138,903)
Acquisition of treasury stock (shares)			393
Net income				327,438		327,438us-gaap_NetIncomeLoss
Foreign currency translation adjustment					596	596
Balance at Dec. 31, 2013	352	919,840	(660,421)	1,276,897	1,620	1,538,288us-gaap_StockholdersEquity
Balance, Shares at Dec. 31, 2013	35,245		4,212
Stock-based compensation		97,618				97,618
Stock plan transactions and other	2	(193)				(191)
Stock plan transactions and other, Shares	149
Excess tax benefit on stock-based compensation		21,667				21,667
Acquisition of treasury stock (value)			(88,338)			(88,338)
Acquisition of treasury stock (shares)			155
Net income				445,374		445,374us-gaap_NetIncomeLoss
Foreign currency translation adjustment					(2,049)	(2,049)
Balance at Dec. 31, 2014	$ 354	$ 1,038,932	$ (748,759)	$ 1,722,271	$ (429)	$ 2,012,369us-gaap_StockholdersEquity
Balance, Shares at Dec. 31, 2014	35,394		4,367