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, 2009	$ 31,915	$ 92	$ 60,671	$ (8,287)	$ 136,402	$ 220,793
Balances, shares at Dec. 31, 2009		9,182
Net income					4,957	4,957
Unrealized (loss) gain from derivative instruments, net of tax (benefit) expense				(4,416)		(4,416)
Total comprehensive income						541
Preferred stock dividends paid					(1,564)	(1,564)
Shares repurchased			(282)			(282)
Shares repurchased, shares		(24)
Shares issued under stock compensation plans		2	352			354
Shares issued under stock compensation plans, shares		274
Stock-based compensation expense			1,173			1,173
Excess tax (cost) benefit from stock-based compensation			(53)			(53)
Balances at Jun. 30, 2010	31,915	94	61,861	(12,703)	139,795	220,962
Balances, shares at Jun. 30, 2010		9,432
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					8,545	8,545
Unrealized (loss) gain from derivative instruments, net of tax (benefit) expense				642		642
Total comprehensive income						9,187
Preferred stock dividends paid					(1,564)	(1,564)
Shares repurchased		(4)	(5,292)			(5,296)
Shares repurchased, shares		(403)
Shares issued under stock compensation plans		2	(107)			(105)
Shares issued under stock compensation plans, shares		179
Stock-based compensation expense			1,477			1,477
Excess tax (cost) benefit from stock-based compensation			425			425
Balances at Jun. 30, 2011	$ 31,915	$ 90	$ 56,611	$ (9,827)	$ 152,305	$ 231,094
Balances, shares at Jun. 30, 2011		8,957