CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Balance at beginning of period at Dec. 31, 2012		$ 63,047	$ 20,624	$ 885,754	$ 487,166	$ 28,432
Total stockholders' equity	1,220,593	63,047	20,704	887,437	307,890	(58,485)
Common stock issued for compensation			15	0
Repurchase of common stock			(5)	(335)
Restricted stock grants			74	(74)
Restricted stock forefeited			(4)	4
Stock-based compensation				2,088
Net income (loss)	(179,276)				(179,276)
Excess of carrying amount of preferred stock exchanged over fair value of new common stock	0				0
Other comprehensive income (loss), net of tax	(86,917)					(86,917)
Common stock issued in exchange of preferred stock-Series A through E			0	0
Exchange Of Preferred Stock Series For Common Stock		0
Reversal of Issuance cost of Series A through E of preferred stock exchanged				0
Issuance Cost Of Common Stock				0
Balance at end of period at Sep. 30, 2013	1,220,593	63,047	20,704	887,437	307,890	(58,485)
Balance at beginning of period at Dec. 31, 2013	1,215,858	63,047	20,707	888,161	322,679	(78,736)
Total stockholders' equity	1,324,157	36,104	21,298	915,231	385,847	(34,323)
Common stock issued for compensation			23	(23)
Repurchase of common stock			(10)	(513)
Restricted stock grants			122	(122)
Restricted stock forefeited			(3)	3
Stock-based compensation				2,962
Net income (loss)	61,509				61,509
Excess of carrying amount of preferred stock exchanged over fair value of new common stock	1,659				1,659
Other comprehensive income (loss), net of tax	44,413					44,413
Common stock issued in exchange of preferred stock-Series A through E			459	23,904
Exchange Of Preferred Stock Series For Common Stock		(26,943)
Reversal of Issuance cost of Series A through E of preferred stock exchanged				921
Issuance Cost Of Common Stock				(62)
Balance at end of period at Sep. 30, 2014	$ 1,324,157	$ 36,104	$ 21,298	$ 915,231	$ 385,847	$ (34,323)