Stock-Based Compensation (Tables)

9 Months Ended

Sep. 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 nine months ended September 30, 2015 and 2014, respectively, the assumptions shown in the following table were used:


	Nine Months Ended September 30,
	2015			2014
Weighted-average fair value of grants	$	16.26		$	18.02
Dividend yield		0	%		0	%
Average risk-free interest rate		1.6	%		1.7	%
Expected term (years)		5			5
Expected volatility		43	%		53	%

Summary of Stock-Based Compensation Grants

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


	Nine Months Ended September 30, 2015
	Stock Awards Granted		Weighted-Average Grant Price Per Share
Time-based restricted stock		57,408	$	43.84
Performance-based restricted stock		34,638	$	43.89
Stock appreciation rights		15,585	$	41.19

Summary of Stock-Based Compensation Expense

The following table summarizes the Company’s stock-based compensation expense for the three months and nine months ended September 30, 2015 and 2014 (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Stock appreciation rights	$	111	$	222	$	400	$	813
Time-based restricted stock		750		769		2,245		2,247
Performance-based restricted stock		432		205		1,320		570
Employee stock purchase plan		11		21		56		42

Total stock-based compensation	$	1,304	$	1,217	$	4,021	$	3,672