Consolidated Statements of Shareholders' Equity Statement (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	39			39
Granting and vesting of restricted stock			2	690			692
Amortization of stock issuance costs				(9)			(9)
Stock Repurchased During Period, Value			0	(131)			(131)
Adjustments for tax withholding on share-based compensation			0	(545)			(545)
Net income (loss)	(9,472)					(9,472)	(9,472)
Dividends on preferred stock						(2,294)	(2,294)
Dividends on common stock						(13,174)	(13,174)
Other comprehensive (loss) income	23,053				23,053		23,053
Total shareholders' equity, ending balance at Mar. 31, 2015	$ 605,461	$ 109,658	$ 549	$ 763,979	$ 44,369	$ (313,094)	$ 605,461