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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Summary of Stock Option Activity

Stock option activity for the year ended December 31, 2014 is presented below (in thousands, except per share data and contractual term):

		Number of Shares				Weighted- Average Exercise Price Per Share				Weighted- Average Remaining Contractual Term (in years)				Aggregate Intrinsic Value
Outstanding at December 31, 2013			1,734			$	31.85
Granted			550				38.20
Exercised			(255	)			29.67
Forfeited			(75	)			34.82
Outstanding at December 31, 2014			1,954			$	33.81				7.11			$	10,870
Exercisable at December 31, 2014			852			$	30.46				5.03			$	7,582
Vested and expected to vest at December 31, 2014			1,837			$	33.61				6.99			$	10,587

Details of Restricted Stock Unit Activity

RSU activity for the year ended December 31, 2014 is presented below (in thousands, except per share data):

		Number of Shares				Weighted- Average Grant Date Fair Value
Unvested at December 31, 2013			372			$	34.14
Granted			235				36.67
Vested			(96	)			33.99
Forfeited			(78	)			33.61
Unvested at December 31, 2014			433			$	35.64

Summary of Shares Purchased by Employees Under the Stock Purchase Plan

Shares purchased by employees under the Stock Purchase Plan are as follows (in thousands, except per share data):

		Shares				Purchase
Purchase Period Ended		Purchased				Price
February 28, 2014			23			$	27.83
August 31, 2014			21			$	30.55
February 28, 2013			26			$	23.34
August 31, 2013			27			$	23.42

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- Definition

Tabular disclosure of the changes in outstanding nonvested restricted stock units.

+ 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)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Tabular disclosure of employee stock purchase plan activity.

+ 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 (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ 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)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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