Consolidated Statement 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 Other Comprehensive Income (Loss)
Balance at Dec. 31, 2012	$ 3,072,864	$ 278,252	$ 99	$ 2,494,303	$ 37,356	$ 262,854
Issuance of stock
Issuance of stock
Redemption of common stock	(21,063)		(1)	(21,062)
Share based compensation expense	1,893			1,893
Dividends declared on common stock	(192,211)				(192,211)
Dividends declared on preferred stock	(16,441)				(16,441)
Net loss	(124,168)				(124,168)
Other comprehensive loss	(347,233)					(347,233)
Balance at Sep. 30, 2013	$ 2,373,641	$ 278,252	$ 98	$ 2,475,134	$ (295,464)	$ (84,379)