Share-based Compensation Arrangement by Share-based Payment Award, Contractual Term

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-- None. No documentation exists for this element. --

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- Definition

Share-based Compensation Arrangement by Share-Based Payment Award, Number of Annual Stock Award Grants

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-Based Payment Award, Number of Equal Vesting Components

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No definition available.

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- Definition

This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64, 65

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

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-Paragraph 1

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 6, 7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph A240

-Subparagraph a

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ References

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

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-Name Accounting Standards Codification

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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-Paragraph A240

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- Definition

Purchase price of common stock expressed as a percentage of its fair market value.

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No definition available.

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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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Stock-based Compensation: Incentive Award Plan and Employee Stock Purchase Plan (Details) (USD $)	0 Months Ended	12 Months Ended				0 Months Ended	12 Months Ended										0 Months Ended	12 Months Ended					0 Months Ended		0 Months Ended											0 Months Ended	12 Months Ended	0 Months Ended		12 Months Ended		0 Months Ended					12 Months Ended		0 Months Ended				12 Months Ended		12 Months Ended
	Mar. 04, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 2010 Incentive Award Plan [Member]	Jun. 03, 2010 2010 Employee Stock Purchase Plan (ESPP)	Dec. 31, 2013 2010 Employee Stock Purchase Plan (ESPP)	Dec. 31, 2012 2010 Employee Stock Purchase Plan (ESPP)	Dec. 31, 2011 2010 Employee Stock Purchase Plan (ESPP)	Dec. 31, 2013 Stock Options [Member]	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2013 Stock Options [Member] 2010 Incentive Award Plan [Member]	Dec. 31, 2013 Restricted Stock Units and Awards [Member]	Dec. 31, 2012 Restricted Stock Units and Awards [Member]	Dec. 31, 2011 Restricted Stock Units and Awards [Member]	May 15, 2013 Performance Based Award installment	Dec. 31, 2013 RSU and RSA Excluding Directors [Member]	Dec. 31, 2012 RSU and RSA Excluding Directors [Member]	Dec. 31, 2011 RSU and RSA Excluding Directors [Member]	Dec. 31, 2013 Chief Executive Officer [Member]	Nov. 04, 2009 Chief Executive Officer [Member] grant	Jun. 03, 2010 Chief Executive Officer [Member] Market Based Award	Mar. 04, 2013 Chief Executive Officer [Member] Performance Based Award installment	Dec. 31, 2012 Chief Executive Officer [Member] Restricted Stock Units (RSUs)	Feb. 01, 2012 Chief Executive Officer [Member] Restricted Stock Units (RSUs)	Feb. 01, 2011 Chief Executive Officer [Member] Restricted Stock Units (RSUs)	Mar. 17, 2010 Chief Executive Officer [Member] Restricted Stock Units (RSUs)	Jun. 01, 2013 Other Executive Officers Performance Based Award	Mar. 04, 2013 Other Executive Officers Performance Based Award	Jun. 21, 2013 Other Executive Officers Performance Shares 2012 [Member]	Mar. 05, 2012 Other Executive Officers Vested December 31, 2012 [Member] Restricted Stock Units (RSUs)	Mar. 08, 2011 Other Executive Officers Vested on January 3, 2012 [Member] Restricted Stock Units (RSUs)	May 15, 2012 Other Executive Officers Apex Systems Vesting on May 31, 2013 [Member] Restricted Stock Units (RSUs)	Dec. 31, 2013 Director [Member] Stock Options [Member]	Aug. 01, 2013 Director [Member] Restricted Stock Units (RSUs)	Dec. 31, 2013 Director [Member] Restricted Stock Units (RSUs)	Feb. 02, 2014 2011 Award Date [Member] Chief Executive Officer [Member] Performance Based Award	Dec. 31, 2012 2011 Award Date [Member] Chief Executive Officer [Member] Performance Based Award	Dec. 31, 2012 2011 Award Date [Member] Chief Executive Officer [Member] Performance Based Award	Mar. 08, 2011 2011 Award Date [Member] Chief Executive Officer [Member] Performance Based Award	Dec. 31, 2012 2011 Award Date [Member] Chief Executive Officer [Member] Restricted Stock Units (RSUs)	Jan. 02, 2012 2011 Award Date [Member] Chief Executive Officer [Member] Restricted Stock Units (RSUs)	Mar. 08, 2011 2011 Award Date [Member] Chief Executive Officer [Member] Restricted Stock Units (RSUs)	Feb. 02, 2014 2012 Award Date [Member] Chief Executive Officer [Member] Performance Based Award	Dec. 31, 2012 2012 Award Date [Member] Chief Executive Officer [Member] Performance Based Award	Dec. 31, 2013 2012 Award Date [Member] Chief Executive Officer [Member] Performance Based Award	Mar. 23, 2012 2012 Award Date [Member] Chief Executive Officer [Member] Performance Based Award	Jan. 04, 2014 2012 Award Date [Member] Chief Executive Officer [Member] Restricted Stock Units (RSUs)	Dec. 31, 2012 2012 Award Date [Member] Chief Executive Officer [Member] Restricted Stock Units (RSUs)	Mar. 05, 2012 2012 Award Date [Member] Chief Executive Officer [Member] Restricted Stock Units (RSUs)	Feb. 02, 2014 2013 Award Date [Member] [Domain] Chief Executive Officer [Member] Performance Based Award	Dec. 31, 2013 2013 Award Date [Member] [Domain] Chief Executive Officer [Member] Performance Based Award	Mar. 04, 2013 2013 Award Date [Member] [Domain] Chief Executive Officer [Member] Performance Based Award	Dec. 31, 2013 Minimum [Member] Restricted Stock Units and Awards [Member] 2010 Incentive Award Plan [Member]	Dec. 31, 2013 Maximum [Member] Restricted Stock Units and Awards [Member] 2010 Incentive Award Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense charged to operations related to stock-based compensation		$ 14,100,000	$ 9,500,000	$ 6,800,000			$ 1,200,000	$ 800,000	$ 400,000
Income tax benefit for stock-based compensation arrangements		5,100,000	3,500,000	2,500,000
Number of shares to be issued						3,500,000
Shares available for issuance					3,726,322
Vesting period													4 years																																										3 years	4 years
Contractual term													10 years
Grant date fair value	3,200,000																					800,000	500,000		800,000			500,000	100,000	1,000,000	300,000	800,000	700,000	200,000							1,000,000			600,000			500,000	1,500,000			600,000		500,000	1,000,000
Share-based award expense, service period																							2 years 7 months 6 days																	9 months 27 days							9 months 9 days						10 months 3 days
Share-based awards, number of annual stock awards																						3
Liability for share-based awards																					2,500,000
Share-based awards, grants in period	143,182													621,262			59,942								39,448			67,568								26,064								58,754							45,372
Shares vested														538,525												33,784	33,784									13,032		16,772	24,654			29,377	29,377		16,772	24,654			22,686	22,686		16,233
Granted, weighted average grant date fair value														$ 26.77				$ 26.17	$ 16.01	$ 9.18																$ 30.69
Share-based awards, number of equal vesting components																	12							3
Shares surrendered by the employees to the Company for payment of minimum tax withholding obligations														168,954
Share-based awards expense, service period										1 year 11 months 19 days				2 years																							7 months
Options outstanding (in shares)		859,945.000																																	0
Weighted-average grant-date fair value of options granted							$ 7.16	$ 3.53	$ 2.10		$ 10.34	$ 5.04
Total intrinsic value of options exercised										7,600,000	9,700,000	1,300,000		15,000,000	13,700,000	6,400,000
Unrecognized compensation expense										$ 900,000				$ 15,500,000																							$ 212,391
Purchase price of common stock, percent						85.00%
Employee stock purchase plan (in shares)							203,200	154,934	187,036
Document Fiscal Year Focus		2013