Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2009	$ 85,330	$ 4,723	$ (18,013)	$ 132,106	$ (21,859)	$ (11,627)
Balance, shares at Dec. 31, 2009		40,682,815	4,008,963
Net income	9,486				9,486
Stock-based compensation and stock option exercises, shares		242,804
Stock-based compensation and stock option exercises	1,491	22		1,469
Change in pension net actuarial loss and prior service credit, net of tax	3,484					3,484
Other	(1,443)			(1,443)
Foreign currency translation adjustment	(260)					(260)
Balance at Dec. 31, 2010	98,088	4,745	(18,013)	132,132	(12,373)	(8,403)
Balance, shares at Dec. 31, 2010		40,925,619	4,008,963
Net income	9,172				9,172
Stock-based compensation and stock option exercises, shares		144,597
Stock-based compensation and stock option exercises	448	13		435
Change in pension net actuarial loss and prior service credit, net of tax	(112)					(112)
Foreign currency translation adjustment	2,698					2,698
Balance at Jun. 30, 2011	$ 110,294	$ 4,758	$ (18,013)	$ 132,567	$ (3,201)	$ (5,817)
Balance, shares at Jun. 30, 2011		41,070,216	4,008,963