Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2014

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

Summary of Assumptions Used to Estimate Fair Value of Each SAR

For SARs issued in the nine months ended September 30, 2014 and 2013, respectively, the assumptions shown in the following table were used:

	Nine Months Ended September 30,
	2014			2013
Weighted-average fair value of grants	$	18.02		$	11.68
Dividend yield		0	%		0	%
Average risk-free interest rate		1.7	%		0.7	%
Expected term (years)		5			5
Expected volatility		53	%		64	%

Summary of Stock-Based Compensation Grants

The following table summarizes the Company’s stock-based compensation grants for the nine months ended September 30, 2014:

	Stock Awards Granted		Weighted-Average Grant Price Per Share
Stock appreciation rights		3,623	$	38.17
Time-based restricted stock		66,409	$	32.69
Performance-based restricted stock		42,676	$	33.72

Summary of Stock-Based Compensation Expense

The following table summarizes the Company’s stock-based compensation expense for the three and nine months ended September 30, 2014 and 2013 (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Stock appreciation rights	$	222	$	307	$	813	$	945
Time-based restricted stock		769		667		2,247		1,790
Performance-based restricted stock		205		—		570		—
Employee stock purchase plan		21		10		42		46
Total stock-based compensation	$	1,217	$	984	$	3,672	$	2,781