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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Schedule of Stock Option Activity

Stock option activity for the year ended December 31, 2016 is presented below (in thousands, except per share data and contractual term):

						Weighted -				Weighted -
						Average				Average
						Exercise				Remaining				Aggregate
		Number				Price Per				Contractual				Intrinsic
		of Shares				Share				Term (in years)				Value
Outstanding at December 31, 2015			2,171			$	33.84
Granted			83				35.61
Exercised			(496	)			31.73
Forfeited			(218	)			35.68
Outstanding at December 31, 2016			1,540			$	34.35				6.44			$	13,235
Exercisable at December 31, 2016			883			$	33.53				5.22			$	8,315
Vested and expected to vest at December 31, 2016			1,474			$	34.32				6.36			$	12,727

Schedule of Restricted Stock Unit Activity

RSU activity for the year ended December 31, 2016 is presented below (in thousands, except per share data):

						Weighted-
						Average
		Number of				Grant Date
		Shares				Fair Value
Unvested at December 31, 2015			504			$	33.67
Granted			259				37.87
Vested			(171	)			34.05
Forfeited			(53	)			34.32
Unvested at December 31, 2016			539			$	35.50

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 29, 2016		28			$	26.00
August 31, 2016		25			$	27.04
February 28, 2015		25			$	31.98
August 31, 2015		25			$	26.87

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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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