Consolidated Statements of Shareholders' Equity Statement - 6 months ended Jun. 30, 2015 - USD ($) $ in Thousands	Total	Preferred Stock Including Additional Paid in Capital [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Retained Earnings [Member]	Shareholders' Equity [Member]
Total shareholders' equity, beginning balance at Dec. 31, 2014	$ 607,302	$ 109,658	$ 547	$ 763,935	$ 21,316	$ (288,154)	$ 607,302
Stock issuance		0	0	78			78
Granting and vesting of restricted stock			3	1,472			1,475
Amortization of stock issuance costs				(19)			(19)
Stock Repurchased During Period, Value			(8)	(6,680)			(6,688)
Adjustments for tax withholding on share-based compensation			(1)	(556)			(557)
Net income (loss)	20,990					20,990	20,990
Dividends on preferred stock						(4,588)	(4,588)
Dividends on common stock						(26,115)	(26,115)
Other comprehensive (loss) income	(16,625)				(16,625)		(16,625)
Total shareholders' equity, ending balance at Jun. 30, 2015	$ 575,253	$ 109,658	$ 541	$ 758,230	$ 4,691	$ (297,867)	$ 575,253