Statement of Stockholders' Equity (Unaudited) (USD $) In Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Earnings
Beginning Balance at Dec. 31, 2010	$ 127,501	$ 458	$ (782)	$ 77,449	$ (445)	$ 50,821
Beginning Balance, shares at Dec. 31, 2010		45,811	50
Net income	9,481					9,481
Unrealized gain on hedging derivatives, net of taxes of $21	53				53
Common stock purchased for treasury	(14,211)		(14,211)
Common stock purchased for treasury, Shares			945
Exercise of stock options	13			13
Exercise of stock options, shares		1
Excess tax benefits from share-based compensation	69			69
Share-based compensation	1,430			1,430
Ending Balance at Mar. 31, 2011	$ 124,336	$ 458	$ (14,993)	$ 78,961	$ (392)	$ 60,302
Ending Balance, shares at Mar. 31, 2011		45,812	995