Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

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

Schedule of Pre-tax Stock-based Compensation

The following table summarizes the pre-tax stock-based compensation expense included in reported net income (in thousands):

	Years ended December 31,
	2017		2016		2015
Cost of revenue	$	2,832	$	2,545	$	2,366
Selling, general and administrative expenses	757		684		684
Total stock-based compensation expense	$	3,589	$	3,229	$	3,050

Schedule of Non-qualified Stock Option Activity

Summarized information for our non-qualified stock options is as follows:

Stock Options	Number of options		Weighted average exercise price		Weighted average remaining contractual term	Aggregate intrinsic value
Outstanding at December 31, 2016	67,550		$	15.34
Granted	—		—
Exercised	(64,050	)	15.12
Forfeited	(100	)	19.38
Expired	(400	)	19.38
Outstanding at December 31, 2017	3,000		$	19.38	0.77	$	12,000
Exercisable at December 31, 2017	3,000		$	19.38	0.77	$	12,000

Schedule of Restricted Stock Units Activity

Summarized share information for our restricted stock units is as follows:

	Year ended December 31, 2017		Weighted average grant date fair value
	(In shares)		(In dollars)
Outstanding and unvested, beginning of period	207,016		$	29.85
Granted	55,350		24.62
Vested	(105,915	)	28.15
Forfeited	(8,217	)	24.84
Outstanding and unvested, end of period	148,234		$	29.39

Schedule of Performance Restricted Stock Unit Activity

Summarized share information for our performance-based restricted stock units is as follows:

	Year ended December 31, 2017		Weighted average grant date fair value
	(In shares)		(In dollars)
Outstanding and unvested, beginning of period	124,394		$	31.08
Granted	104,590		23.65
Vested	—		—
Forfeited	(39,916	)	27.74
Outstanding and unvested, end of period	189,068		$	27.68