Consolidated Statements Of Shareholders' Equity And Comprehensive Income (USD $) In Thousands	Preferred Stock [Member]	Common Stock [Member]	Paid-In Capital In Excess Of Par [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Retained Earnings [Member]	Total
Balances at Dec. 31, 2010	$ 31,915	$ 92	$ 60,108	$ (10,469)	$ 145,324	$ 226,970
Balances, shares at Dec. 31, 2010		9,181
Net income					5,063	5,063
Unrealized gain from derivative instruments, net of tax expense				1,918		1,918
Total comprehensive income						6,981
Preferred stock dividends paid					(782)	(782)
Shares repurchased		(4)	(5,292)			(5,296)
Shares repurchased, shares		(403)
Cash settlement of stock options			(175)			(175)
Cash settlement of stock options, shares		23
Shares issued under stock compensation plans			330			330
Shares issued under stock compensation plans, shares		34
Cancellation of restricted stock units in satisfaction of withholding tax			(245)			(245)
Cancellation of restricted stock units in satisfaction of withholding tax, shares		(18)
Stock-based compensation, net of forfeitures			712			712
Excess tax benefit from stock-based compensation			245			245
Balances at Mar. 31, 2011	31,915	88	55,683	(8,551)	149,605	228,740
Balances, shares at Mar. 31, 2011		8,817
Balances at Dec. 31, 2011	31,915	91	56,842	(8,891)	156,704	236,661
Balances, shares at Dec. 31, 2011		9,110
Net income					3,289	3,289
Unrealized gain from derivative instruments, net of tax expense				94		94
Total comprehensive income						3,383
Preferred stock dividends paid					(782)	(782)
Shares repurchased		(2)	(1,791)			(1,793)
Shares repurchased, shares		(141)
Shares issued under stock compensation plans		3	288			291
Shares issued under stock compensation plans, shares		256
Cancellation of restricted stock units in satisfaction of withholding tax			(232)			(232)
Cancellation of restricted stock units in satisfaction of withholding tax, shares		(18)
Stock-based compensation, net of forfeitures			751			751
Excess tax benefit from stock-based compensation			213			213
Balances at Mar. 31, 2012	$ 31,915	$ 92	$ 56,071	$ (8,797)	$ 159,211	$ 238,492
Balances, shares at Mar. 31, 2012		9,207