Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Information with Respect to Stock-based Compensation

A summary of information with respect to stock-based compensation is as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Total stock-based compensation expense included in operating income	$	302	$	1,281	$	2,775	$	4,081
Income tax benefit related to stock-based compensation included in net income	$	118	$	495	$	1,087	$	1,576

Restricted Stock Unit Activity

Restricted stock unit activity for the nine months ended September 30, 2013:

	Number of Restricted Stock Units			Weighted- Average Grant-date Fair  Value
Outstanding on December 31, 2012		361,778		$	23.43
Granted		174,508			14.01
Vested and converted to common stock		(142,487	)		24.15
Forfeited		(97,876	)		17.69
Outstanding on September 30, 2013		295,923			19.43

Performance Stock Unit Activity

Performance stock unit activity for the nine months ended September 30, 2013:

	Number of Peformance Stock Units			Weighted- Average Grant-date Fair Value
Outstanding on December 31, 2012		80,000		$	23.75
Granted		63,895			13.89
Vested and converted to common stock		—			—
Forfeited		(82,574	)		19.07
Outstanding on September 30, 2013		61,321			19.77