Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

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 six months ended June 30, 2015 and 2014, respectively, the assumptions shown in the following table were used:

	Six Months Ended June 30,
	2015			2014
Weighted-average fair value of grants	$	17.10		$	18.52
Dividend yield		0	%		0	%
Average risk-free interest rate		1.7	%		1.8	%
Expected term (years)		5			5
Expected volatility		44	%		54	%

Summary of Stock-Based Compensation Grants

The following table summarizes the Company’s stock-based compensation grants for the six months ended June 30, 2015:

	Six Months Ended June 30, 2015
	Stock Awards Granted		Weighted-Average Grant Price Per Share
Time-based restricted stock		43,944	$	43.92
Performance-based restricted stock		34,638	$	43.89
Stock appreciation rights		201	$	42.47

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, 2015 and 2014 (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Stock appreciation rights	$	99	$	222	$	288	$	591
Time-based restricted stock		662		770		1,496		1,478
Performance-based restricted stock		489		283		888		365
Employee stock purchase plan		12		11		45		21
Total stock-based compensation	$	1,262	$	1,286	$	2,717	$	2,455