Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Preferred Stock	Common Stock	Paid-in Capital in Excess of par	Accumulated Other Comprehensive Income/(Loss)	Retained Earnings
Balances at Dec. 31, 2009	$ 220,793	$ 31,915	$ 92	$ 60,671	$ (8,287)	$ 136,402
Balances (in shares) at Dec. 31, 2009			9,182,000
Increase (Decrease) in Shareholders' Equity
Net income	12,050					12,050
Unrealized gain (loss) from derivative instruments, net of tax benefit (expense) of $ (838) and $1,242 for the years ended December 31, 2011 and 2010, respectively	(2,182)				(2,182)
Preferred stock dividends paid	(3,128)					(3,128)
Shares repurchased	(4,156)		(4)	(4,152)
Shares repurchased (in shares)			(367,000)
Shares issued under stock compensation plans	1,269		5	1,264
Shares issued under stock compensation plans (in shares)			429,000
Cancellation of restricted stock units in satisfaction of withholding tax	(776)		(1)	(775)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)			(63,000)
Stock-based compensation, net of forfeitures	2,678			2,678
Excess tax benefit from stock-based compensation	422			422
Balances at Dec. 31, 2010	226,970	31,915	92	60,108	(10,469)	145,324
Balances (in shares) at Dec. 31, 2010			9,181,000
Increase (Decrease) in Shareholders' Equity
Net income	14,508					14,508
Unrealized gain (loss) from derivative instruments, net of tax benefit (expense) of $ (838) and $1,242 for the years ended December 31, 2011 and 2010, respectively	1,578				1,578
Preferred stock dividends paid	(3,128)					(3,128)
Shares repurchased	(5,661)		(4)	(5,657)
Shares repurchased (in shares)			(435,000)
Cash settlement of stock options	(1,262)		(2)	(1,260)
Cash settlement of stock options (in shares)			(172,000)
Shares issued under stock compensation plans	672		6	666
Shares issued under stock compensation plans (in shares)			614,000
Cancellation of restricted stock units in satisfaction of withholding tax	(968)		(1)	(967)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)			(78,000)
Stock-based compensation, net of forfeitures	3,173			3,173
Excess tax benefit from stock-based compensation	779			779
Balances at Dec. 31, 2011	236,661	31,915	91	56,842	(8,891)	156,704
Balances (in shares) at Dec. 31, 2011			9,110,000
Increase (Decrease) in Shareholders' Equity
Net income	1,535					1,535
Net unrealized gain (loss) from derivative instruments, net of tax benefit (expense) of ($4,598)	7,661				7,661
Preferred stock dividends paid	(2,493)					(2,493)
Preferred stock redemption	(34,750)	(31,915)				(2,835)
Shares repurchased	(12,736)		(9)	(12,727)
Shares repurchased (in shares)	(928,261)		(928,000)
Shares issued under stock compensation plans	1,725		6	1,719
Shares issued under stock compensation plans (in shares)			627,000
Cancellation of restricted stock units in satisfaction of withholding tax	(1,194)		(1)	(1,193)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)			(93,000)
Stock-based compensation, net of forfeitures	3,144			3,144
Balances at Dec. 31, 2012	$ 199,553		$ 87	$ 47,785	$ (1,230)	$ 152,911
Balances (in shares) at Dec. 31, 2012			8,716,000