Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss) Income	Retained Earnings	Treasury Stock
Balances at Dec. 31, 2010	$ 128,294	$ 642	$ 16,354	$ (3,009)	$ 114,724	$ (417)
Balances (in shares) at Dec. 31, 2010		6,410,400
Increase (Decrease) in Stockholders' Equity
Stock options exercised		1	(1)
Stock options exercised (in shares)		11,244
Stock-based compensation	848	2	846
Stock-based compensation (in shares)		18,050
Treasury shares purchased	(8,323)					(8,323)
Treasury shares purchased (in shares)		(204,255)
Net income	22,186				22,186
Minimum pension liability adjustment, net of tax expense (benefit) of $112, 36 and 85, for 2013, 2012 and 2011, respectively	(149)			(149)
Mark to market of interest rate hedges, net of tax expense (benefit) of $398, $312 and $89 for 2013, 2012 and 2011, respectively	157			157
Comprehensive income	22,194			8	22,186
Balances at Dec. 31, 2011	143,013	645	17,199	(3,001)	136,910	(8,740)
Balances (in shares) at Dec. 31, 2011		6,235,439
Increase (Decrease) in Stockholders' Equity
Stock options exercised	75	1	74
Stock options exercised (in shares)		10,000
Stock-based compensation	1,082	2	1,080
Stock-based compensation (in shares)		16,998
Treasury shares purchased	(40,847)					(40,847)
Treasury shares purchased (in shares)		(704,429)
Net income	16,423				16,423
Minimum pension liability adjustment, net of tax expense (benefit) of $112, 36 and 85, for 2013, 2012 and 2011, respectively	64			64
Mark to market of interest rate hedges, net of tax expense (benefit) of $398, $312 and $89 for 2013, 2012 and 2011, respectively	545			545
Comprehensive income	17,032			609	16,423
Balances at Dec. 31, 2012	120,355	648	18,353	(2,392)	153,333	(49,587)
Balances (in shares) at Dec. 31, 2012		5,558,008
Increase (Decrease) in Stockholders' Equity
Stock options exercised	34	1	33
Stock options exercised (in shares)		5,262
Stock-based compensation	934	1	933
Stock-based compensation (in shares)		16,425
Treasury shares purchased	(212)					(212)
Treasury shares purchased (in shares)		(4,563)
Net income	14,800				14,800
Minimum pension liability adjustment, net of tax expense (benefit) of $112, 36 and 85, for 2013, 2012 and 2011, respectively	197			197
Mark to market of interest rate hedges, net of tax expense (benefit) of $398, $312 and $89 for 2013, 2012 and 2011, respectively	697			697
Comprehensive income	15,694			894	14,800
Balances at Dec. 31, 2013	$ 136,805	$ 650	$ 19,319	$ (1,498)	$ 168,133	$ (49,799)
Balances (in shares) at Dec. 31, 2013		5,575,132