Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $) In Thousands	Total	Common Stock	Additional paid-in capital	Retained Earnings	Treasury Stock	Unallocated common stock held by the ESOP	Accumulated other comprehensive income (loss)
Balance at beginning of year at Dec. 31, 2010			$ 4,705,255	$ 2,642,338	$ (1,725,946)	$ (204,230)	$ 85,406
Common Stock		7,415
Stock option plan expense			2,196
Tax benefit from stock plans			89
Allocation of ESOP stock			1,164			1,501
Vesting of RRP stock			870
Net Income	(555,664)			(555,664)
Dividends paid on common stock ($0.08 and $0.15 per share, respectively)	74,095			(74,095)
Other comprehensive loss, net of tax							(157,452)
Balance at end of period at Mar. 31, 2011	4,728,847		4,709,574	2,012,579	(1,725,946)	(202,729)	(72,046)
Balance at beginning of year at Dec. 31, 2011	4,560,440		4,720,890	1,709,821	(1,719,114)	(198,223)	39,651
Common Stock		7,415
Stock option plan expense			1,535
Tax benefit from stock plans			1,063
Allocation of ESOP stock			1,163			1,502
Purchase of common stock					(427)
Vesting of RRP stock			20
Net Income	72,987			72,987
Dividends paid on common stock ($0.08 and $0.15 per share, respectively)	39,660			(39,660)
Exercise of stock options				(1,577)	5,015
Other comprehensive loss, net of tax							15,448
Balance at end of period at Mar. 31, 2012	$ 4,617,509		$ 4,724,761	$ 1,741,571	$ (1,714,526)	$ (196,721)	$ 55,099