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)	Summary of comprehensive (loss) income
Beginning Balance at Dec. 31, 2009			$ 4,683,414	$ 2,401,606	$ (1,727,579)	$ (210,237)	$ 184,533
Common Stock		7,415
Stock plan expense			5,156
Tax benefit from stock plans			300
Allocation of ESOP stock			3,450			3,003
RRP stock granted			(145)		145
Purchase of common stock					(464)
Vesting of RRP stock			2,060
Net (loss) income	291,476			291,476				291,476
Dividends paid on common stock ($0.23 and $0.30 per share, respectively)	(147,876)			(147,876)
Exercise of stock options				(219)	1,090
Net unrealized gains on securities available for sale arising during period, net of tax expense of $415 and $56,577 in 2011 and 2010, respectively							81,922
Reclassification adjustment for gains in net (loss) income, net of tax of expense of $40,526 and $25,079 in 2011 and 2010, respectively							(36,314)
Pension and other postretirement benefits adjustment, net of tax expense of $795 and $359 for 2011 and 2010, respectively							520
Other comprehensive (loss) income, net of tax							46,128	46,128
Total comprehensive (loss) income								337,604
Ending Balance at Jun. 30, 2010	5,543,256		4,694,235	2,544,987	(1,726,808)	(207,234)	230,661
Beginning Balance at Dec. 31, 2010	5,510,238		4,705,255	2,642,338	(1,725,946)	(204,230)	85,406
Common Stock		7,415
Stock plan expense			4,464
Tax benefit from stock plans			172
Allocation of ESOP stock			1,844			3,003
Purchase of common stock					(163)
Vesting of RRP stock			1,739
Net (loss) income	(459,656)			(459,656)				(459,656)
Dividends paid on common stock ($0.23 and $0.30 per share, respectively)	(113,531)			(113,531)
Exercise of stock options				(13)	52
Net unrealized gains on securities available for sale arising during period, net of tax expense of $415 and $56,577 in 2011 and 2010, respectively							601
Reclassification adjustment for gains in net (loss) income, net of tax of expense of $40,526 and $25,079 in 2011 and 2010, respectively							(61,942)
Pension and other postretirement benefits adjustment, net of tax expense of $795 and $359 for 2011 and 2010, respectively							1,151
Other comprehensive (loss) income, net of tax							(60,190)	(60,190)
Total comprehensive (loss) income								(519,846)
Ending Balance at Jun. 30, 2011	$ 4,887,959		$ 4,713,474	$ 2,069,138	$ (1,726,057)	$ (201,227)	$ 25,216