CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock Member	Preferred Stock Member	Additional Paid In Capital Member	Retained Earnings Member	Treasury Stock Member	Accumulated other comprehensive income (loss)
Beginning Balance at Dec. 31, 2012	$ 4,110,000	$ 1,032	$ 50,160	$ 4,150,294	$ 11,826	$ (444)	$ (102,868)
Net Income	207,161				207,161
Issuance of stock	3,232	1		3,231
Dividends Abstract
Dividends, Preferred Stock, Cash	(1,861)				(1,861)
Treasury Stock Value Acquired Cost Method	(325)					(325)
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	(123,171)						(123,171)
Ending Balance at Jun. 30, 2013	4,195,036	1,033	50,160	4,153,525	217,126	(769)	(226,039)
Beginning Balance at Dec. 31, 2013	4,626,150	1,034	50,160	4,170,152	594,430	(881)	(188,745)
Net Income	(424,905)				(424,905)
Issuance of stock	3,048	1		3,047
Adjustments To Additional Paid In Capital Sharebased Compensation And Exercise Of Stock Options	417			417
Dividends Abstract
Dividends, Preferred Stock, Cash	(1,862)				(1,862)
Stock Issued During Period, Value, Treasury Stock Reissued	11					11
Treasury Stock Value Acquired Cost Method	(872)					(872)
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent	58,454						58,454
Ending Balance at Jun. 30, 2014	$ 4,260,441	$ 1,035	$ 50,160	$ 4,173,616	$ 167,663	$ (1,742)	$ (130,291)