Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Stock-Based Compensation [Abstract]

Summary of fair value of each SAR is estimated on the date of grant using Black-Scholes option-pricing formula

	Six Months Ended June 30,
	2012			2011
Weighted-average fair value of grants	$	14.01		$	14.57
Dividend yield		0	%		0	%
Average risk-free interest rate		0.8	%		2.0	%
Expected term (years)		5			5
Expected volatility		66	%		65	%

Summary of stock-based compensation grants

	Stock Awards Granted		Weighted-Average Grant Price Per Share
Stock appreciation rights		94,797	$	25.56
Restricted stock		66,210	$	25.56

Summary of stock-based compensation expense

	Three Months Ended June  30,				Six Months Ended June 30,
	2012		2011		2012		2011
Stock appreciation rights	$	418	$	358	$	720	$	739
Restricted stock		530		417		933		806
Employee stock purchase plan		9		9		40		36
Total stock-based compensation	$	957	$	784	$	1,693	$	1,581