Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands	Total	Redeemable Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2011	$ 2,080,188		$ 77	$ 1,904,748	$ 2,041	$ 173,322
Issuance of preferred stock	278,252	278,252
Issuance of common stock	587,657		22	587,635
Share based compensation expense	1,920			1,920
Dividends declared on preferred stock	(7,551)				(7,551)
Dividends declared on common stock	(306,379)				(306,379)
Net income (loss)	349,245				349,245
Other comprehensive income	89,532					89,532
Balance at Dec. 31, 2012	3,072,864	278,252	99	2,494,303	37,356	262,854
Repurchase of common stock	(43,881)		(2)	(43,879)
Share based compensation expense	2,594			2,594
Dividends declared on preferred stock	(21,922)				(21,922)
Dividends declared on common stock	(240,512)				(240,512)
Net income (loss)	(134,136)				(134,136)
Other comprehensive income	(270,906)					(270,906)
Balance at Dec. 31, 2013	2,364,101	278,252	97	2,453,018	(359,214)	(8,052)
Repurchase of common stock	(1,912)			(1,912)
Share based compensation expense	3,612			3,612
Dividends declared on preferred stock	(21,922)				(21,922)
Dividends declared on common stock	(193,261)				(193,261)
Net income (loss)	56,361				56,361
Other comprehensive income	213,817					213,817
Balance at Dec. 31, 2014	$ 2,420,796	$ 278,252	$ 97	$ 2,454,718	$ (518,036)	$ 205,765