Consolidated Statement 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	Comprehensive (Loss) Income
Balances at Dec. 31, 2008	$ 94,447	$ 635	$ 14,853	$ (3,911)	$ 83,014	$ (144)
Balances (in shares) at Dec. 31, 2008		6,348,086
Increase (Decrease) in Stockholders' Equity
Stock options exercised, including $29 tax benefit for period ended 2009.	195	3	192
Stock options exercised, including $29 tax benefit for period ended 2009 (in shares).		31,054
Stock-based compensation	576	2	574
Stock-based compensation (in shares)		17,510
Treasury shares purchased	(100)					(100)
Treasury shares purchased (in shares)		(3,069)
Net income	13,670				13,670		13,670
Minimum pension liability adjustment, net of $85, $17 and $96 tax (expense) benefit for period ended 2011, 2010 and 2009 respectively.	(168)			(168)			(168)
Mark to market of interest rate hedge, net of $89, $182 and $778 tax benefit (expense) for period ended 2011, 2010 and 2009 respectively.	1,361			1,361			1,361
Comprehensive (loss) income	14,863			1,193	13,670		14,863
Balances at Dec. 31, 2009	109,981	640	15,619	(2,718)	96,684	(244)
Balances (in shares) at Dec. 31, 2009		6,393,581
Increase (Decrease) in Stockholders' Equity
Stock options exercised, including $29 tax benefit for period ended 2009 (in shares).		2,660
Stock-based compensation	737	2	735
Stock-based compensation (in shares)		18,635
Treasury shares purchased	(173)					(173)
Treasury shares purchased (in shares)		(4,476)
Net income	18,040				18,040		18,040
Minimum pension liability adjustment, net of $85, $17 and $96 tax (expense) benefit for period ended 2011, 2010 and 2009 respectively.	30			30			30
Mark to market of interest rate hedge, net of $89, $182 and $778 tax benefit (expense) for period ended 2011, 2010 and 2009 respectively.	(321)			(321)			(321)
Comprehensive (loss) income	17,749			(291)	18,040		17,749
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, including $29 tax benefit for period ended 2009.		1	(1)
Stock options exercised, including $29 tax benefit for period ended 2009 (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		22,186
Minimum pension liability adjustment, net of $85, $17 and $96 tax (expense) benefit for period ended 2011, 2010 and 2009 respectively.	(149)			(149)			(149)
Mark to market of interest rate hedge, net of $89, $182 and $778 tax benefit (expense) for period ended 2011, 2010 and 2009 respectively.	157			157			157
Comprehensive (loss) income	22,194			8	22,186		22,194
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