Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) In Thousands	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	(Accumulated Deficit) Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2009	$ 85,330	$ 4,723	$ (18,013)	$ 132,106	$ (21,859)	$ (11,627)
Beginning 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)
Ending balance at Dec. 31, 2010	98,088	4,745	(18,013)	132,132	(12,373)	(8,403)
Ending balance, shares at Dec. 31, 2010		40,925,619	4,008,963
Net income	12,754				12,754
Stock-based compensation and stock option exercises, shares		204,919
Stock-based compensation and stock option exercises	790	20		770
Change in pension net actuarial loss and prior service credit, net of tax	304					304
Foreign currency translation adjustment	(926)					(926)
Ending balance at Sep. 30, 2011	$ 111,010	$ 4,765	$ (18,013)	$ 132,902	$ 381	$ (9,025)
Ending balance, shares at Sep. 30, 2011		41,130,538	4,008,963