Equity Awards (Tables)

9 Months Ended

Sep. 30, 2013

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

Schedule of Share-based Compensation, Stock Options, Activity

Information related to stock options at September 30, 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	(320,940	)	21.25
Cancelled	—		—
Expired	—		—
Outstanding at September 30, 2013	354,725		$	10.33	4.2	$	9,569,015

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

Information related to restricted shares at September 30, 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	403,615		28.23
Vested	(352,236	)	21.94
Cancelled	(4,516	)	25.73
Outstanding at September 30, 2013	682,900		$	25.71	1.6	$	25,478,499