Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

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

	Years ended December 31,
	2013		2012		2011
Cost of revenue	$	1,163	$	1,294	$	1,462
Selling, general and adminstrative expenses		465		497		530
Total stock-based compensation expense	$	1,628	$	1,791	$	1,992

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

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

				Weighted
				average
		Weighted		remaining	Aggregate
	Number of	average		contractual	intrinsic
Stock Options	options	exercise price		term	value
Outstanding at December 31, 2012	624,700	$	9.54
Granted	—		—
Exercised	(49,600)		10.46
Forfeited	(4,300)		14.61
Expired	(1,500)		13.17
Outstanding at December 31, 2013	569,300	$	9.41	2.45	$	11,603,000
Stock options expected to vest	550,600	$	9.39	2.44	$	11,230,000
Exercisable at December 31, 2013	268,200	$	8.57	2.27	$	5,691,000

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]

Summarized weighted average information for non-qualified stock options granted to certain key personnel during the years ended December 31, 2012 and 2011 is as follows (no stock options were granted during the year ended December 31, 2013):

	2012			2011
Number of options granted		54,500			157,500
Exercise price	$	17.57		$	13.18
Vesting term		4.5 years			5 years
Contractual term		5.5 years			6 years
Grant-date fair value	$	6.80		$	4.63
Black-Scholes assumptions:
Expected term		4.2 years			4.5 years
Expected stock price volatility		48.3	%		39.3	%
Risk-free interest rate		0.61	%		1.82	%
Expected dividend yield		—	%		—	%

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

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

		Weighted
	Year ended	average
	December 31,	grant date
	2013	fair value
	(In shares)	(In dollars)
Outstanding and unvested, beginning of period	210,992	$	18.40
Granted	81,575		29.17
Vested	(47,036)		17.49
Forfeited	(1,500)		19.38
Outstanding and unvested, end of period	244,031	$	22.17
Restricted stock units expected to vest	231,217	$	22.03