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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of Restricted Stock Unit Activity

RSU activity for the year ended December 31, 2018 is presented below (in thousands, except per share data):

						Weighted-
						Average
		Number of				Grant Date
		Shares				Fair Value
Unvested at December 31, 2017			509			$	37.59
Granted			261				43.71
Vested			(198	)			37.12
Forfeited			(75	)			38.31
Unvested at December 31, 2018			497			$	40.89

Schedule of Stock Option Activity

Stock option activity for the year ended December 31, 2018 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, 2017			937			$	35.10
Granted			—				—
Exercised			(319	)			34.83
Forfeited			(35	)			34.78
Outstanding at December 31, 2018			583			$	35.27				4.82			$	5,496
Exercisable at December 31, 2018			488			$	35.40				4.44			$	4,545
Vested and expected to vest at December 31, 2018			583			$	35.27				4.82			$	5,496

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, 2018		27			$	34.43
August 31, 2018		28			$	34.21
February 28, 2017		24			$	31.03
August 31, 2017		26			$	31.71

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Tabular disclosure of employee stock purchase plan activity.

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-Topic 718
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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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