Consolidated Statements of Shareholders' Equity (USD $) In Thousands, 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, 2011	$ 236,661	$ 31,915	$ 91	$ 56,842	$ (8,891)	$ 156,704
Balances (in shares) at Dec. 31, 2011			9,110
Increase (Decrease) in Shareholders' Equity
Net income	6,518					6,518
Unrealized gain from derivative instruments, net of tax expense of $260 and $425 for the six months ended June 30, 2013 and June 30, 2012, respectively	737				737
Preferred stock dividends paid	(1,564)					(1,564)
Shares repurchased	(1,793)		(2)	(1,791)
Shares repurchased (in shares)			(141)
Shares issued under stock compensation plans	1,227		4	1,223
Shares issued under stock compensation plans (in shares)			430
Cancellation of restricted stock units in satisfaction of withholding tax	(603)			(603)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)			(48)
Stock-based compensation, net of forfeitures	1,603			1,603
Excess tax benefit from stock-based compensation	685			685
Balances at Jun. 30, 2012	243,471	31,915	93	57,959	(8,154)	161,658
Balances (in shares) at Jun. 30, 2012			9,351
Balances at Dec. 31, 2012	199,553		87	47,785	(1,230)	152,911
Balances (in shares) at Dec. 31, 2012			8,716
Increase (Decrease) in Shareholders' Equity
Net income	11,302					11,302
Unrealized gain from derivative instruments, net of tax expense of $260 and $425 for the six months ended June 30, 2013 and June 30, 2012, respectively	450				450
Shares repurchased	(358)			(358)
Shares repurchased (in shares)			(25)
Shares issued under stock compensation plans	506		2	504
Shares issued under stock compensation plans (in shares)			203
Cancellation of restricted stock units in satisfaction of withholding tax	(480)			(480)
Cancellation of restricted stock units in satisfaction of withholding tax (in shares)			(33)
Stock-based compensation, net of forfeitures	1,715			1,715
Balances at Jun. 30, 2013	$ 212,688		$ 89	$ 49,166	$ (780)	$ 164,213
Balances (in shares) at Jun. 30, 2013			8,861