Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands	Total	7.625% Series A Cumulative Redeemable Preferred Stock	Common Stock Amount	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	Preferred Stock	Preferred Stock 7.625% Series A Cumulative Redeemable Preferred Stock
Balance at Dec. 31, 2010	$ 1,145,484		$ 46	$ 1,043,027	$ (3,480)	$ 105,891
Issuance of stock	860,602		31	860,571
Share based compensation expense	1,150			1,150
Dividends declared on common stock	(278,852)				(278,852)
Net income (loss)	284,373				284,373
Other comprehensive income (loss)	67,431					67,431
Balance at Dec. 31, 2011	2,080,188		77	1,904,748	2,041	173,322
Issuance of stock	587,657		22	587,635			278,252	278,252
Share based compensation expense	1,920			1,920
Dividends declared on common stock	(306,379)				(306,379)
Dividends declared on preferred stock	(7,551)				(7,551)
Net income (loss)	349,245				349,245
Other comprehensive income (loss)	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 common stock	(240,512)				(240,512)
Dividends declared on preferred stock	(21,922)				(21,922)
Net income (loss)	(134,136)				(134,136)
Other comprehensive income (loss)	(270,906)					(270,906)
Balance at Dec. 31, 2013	$ 2,364,101	$ 278,252	$ 97	$ 2,453,018	$ (359,214)	$ (8,052)