Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Assumptions Used to Estimate Fair Value of Each SAR

Black-Scholes option-pricing formula. For SARs issued in the six months ended June 30, 2013 and 2012, respectively, the assumptions shown in the following table were used:

	Six Months Ended June 30,
	2013			2012
Weighted-average fair value of grants	$	23.35		$	14.01
Dividend yield		0	%		0	%
Average risk-free interest rate		0.7	%		0.8	%
Expected term (years)		5			5
Expected volatility		64	%		66	%

Summary of Stock-Based Compensation Grants

The following table summarizes the Company’s stock-based compensation grants for the six months ended June 30, 2013:

	Stock Awards Granted		Weighted-Average Grant Price Per Share
Stock appreciation rights		60,306	$	43.87
Restricted stock		39,660	$	43.88

Summary of Stock-Based Compensation Expense

The following table summarizes the Company’s stock-based compensation expense for the three and six months ended June 30, 2013 and 2012 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Stock appreciation rights	$	307	$	418	$	638	$	720
Restricted stock		586		530		1,123		933
Employee stock purchase plan		9		9		36		40
Total stock-based compensation	$	902	$	957	$	1,797	$	1,693