Equity Awards (Tables)

12 Months Ended

Dec. 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 December 31, 2013 is as follows:

	Number of Stock Options		Weighted Average Option Price		Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at January 1, 2013	675,665		$	15.52
Exercised	(333,217	)	21.27
Cancelled	—		—
Expired	—		—
Outstanding at December 31, 2013	342,448		$	9.92	4.0	$	10,262,180

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

Information related to restricted shares at December 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	404,817		28.27
Vested	(380,990	)	21.76
Cancelled	(5,464	)	25.94
Outstanding at December 31, 2013	654,400		$	26.00	1.0	$	26,104,016