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, 2013	$ 585,876	$ 109,658	$ 543	$ 761,550	$ (33,816)	$ (252,059)	$ 585,876
Stock issuance		0	1	215			216
Granting and vesting of restricted stock			4	2,041			2,045
Amortization of stock issuance costs				(72)			(72)
Adjustments for tax withholding on share-based compensation			(1)	(506)			(507)
Net income (loss)	24,133					24,133	24,133
Dividends on preferred stock						(6,882)	(6,882)
Dividends on common stock						(41,040)	(41,040)
Other comprehensive (loss) income	50,278						50,278
Total shareholders' equity, ending balance at Sep. 30, 2014	614,047	109,658	547	763,228		(275,848)	614,047
Total shareholders' equity, beginning balance at Jun. 30, 2014
Other comprehensive (loss) income	(14,482)				50,278
Total shareholders' equity, ending balance at Sep. 30, 2014	$ 614,047				$ 16,462