Consolidated Statements Of Changes In Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2009	$ 207	$ 67,879	$ 32,182	$ (33,981)	$ (737)	$ 65,550
Balance, shares at Dec. 31, 2009	17,414
Comprehensive income:
Net income			11,943
Unrealized gain on derivative instrument, net of deferred taxes					245
Total comprehensive income						12,188
Common stock repurchases, shares	(674)
Common stock repurchases				(2,993)		(2,993)
Dividends to stockholders			(5,415)			(5,415)
Issuance of restricted stock awards, shares	232
Issuance of restricted stock awards		(2,384)		2,384
Stock-based compensation expense		2,355				2,355
Tax impact of stock-based compensation		(138)				(138)
Balance at Dec. 31, 2010	207	67,712	38,710	(34,590)	(492)	71,547
Balance, shares at Dec. 31, 2010	16,972
Comprehensive income:
Net income			7,099			7,099
Unrealized gain on derivative instrument, net of deferred taxes					279
Total comprehensive income						7,378
Common stock repurchases, shares	(325)
Common stock repurchases				(1,357)		(1,357)
Dividends to stockholders			(2,700)			(2,700)
Issuance of restricted stock awards, shares	256
Issuance of restricted stock awards		(2,345)		2,345
Stock-based compensation expense		1,675				1,675
Stock option exercises, shares	100
Stock option exercises		(713)		908		195
Tax impact of stock-based compensation		(108)				(108)
Balance at Sep. 30, 2011	$ 207	$ 66,221	$ 43,109	$ (32,694)	$ (213)	$ 76,630
Balance, shares at Sep. 30, 2011	17,003