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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Stock-Based Compensation

Summary of the Company's restricted stock activity

		Shares			Weighted Average Grant-Date Fair Value			Aggregate Intrinsic Value
December 31, 2012			979,022		$	15.28
Granted			448,026			31.41
Vested			(244,059	)		15.74
Forfeited			(14,789	)		23.29
​	​	​	​	​	​	​	​	​	​	​
December 31, 2013			1,168,200		$	23.75		$	55.1
​	​	​	​	​	​	​	​	​	​	​
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- Definition

Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited 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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