Equity Awards (Tables)

3 Months Ended

Mar. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

Information related to stock options at March 31, 2013 is as follows:

	Number of Options		Weighted Average Option Price		Average  Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at January 1, 2013	675,665		$	15.52
Exercised	(170,050	)	22.21
Cancelled	—		—
Expired	—		—
Outstanding at March 31, 2013	505,615		$	13.27	4.1	$	9,709,312

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

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During 2012, the Company awarded restricted shares of common stock to certain Company key employees which are performance-based grants. Of this award, 60% are earned based on 2012 EPS growth, and the remaining 40% are earned based on the EPS CAGR for 2012 and 2013. For the 60% of shares subject to the 2012 earnings per share growth metric only, the performance conditions were satisfied, resulting in an attainment level of 175% of target. This resulted in an additional 72,576 share grants during the first quarter of 2013.

Information related to restricted shares at March 31, 2013 is as follows:

	Number of Unvested Restricted Shares		Weighted Average Grant Date Fair Value		Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at January 1, 2013	636,037		$	22.02
Granted	401,110		28.18
Vested	(331,816	)	22.35
Cancelled	(1,892	)	24.33
Outstanding at March 31, 2013	703,439		$	25.37	2.2	$	22,840,664