Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Cash Flows from Operating Activities:
Net income (loss)	$ 72,987	$ (555,664)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, accretion and amortization expense	29,701	36,850
Provision for loan losses	25,000	40,000	120,000
Gains on securities transactions, net		(102,468)
Loss on extinguishment of debt		1,172,092
Share-based compensation, including committed ESOP shares	4,220	5,731
Deferred tax expense (benefit)	27,541	(3,163)
Decrease in accrued interest receivable	15,579	43,816
Decrease (increase) in other assets	11,062	(359,512)
Increase (decrease) in accrued expenses and other liabilities	11,849	(54,754)
Net Cash Provided by Operating Activities	197,939	222,928
Cash Flows from Investing Activities:
Originations of loans	(1,078,521)	(1,398,408)
Purchases of loans	(4,240)	(147,231)
Principal payments on loans	1,643,543	2,080,773
Principal collection of mortgage-backed securities held to maturity	260,413	606,678
Principal collection of mortgage-backed securities available for sale	576,964	1,026,203
Purchases of mortgage-backed securities available for sale	(444,560)	(3,237,757)
Proceeds from sales of mortgage-backed securities available for sale		9,064,379
Proceeds from maturities and calls of investment securities held to maturity	500,000
Proceeds from sales of investment securities available for sale		82,475
Purchases of investment securities available for sale	(307,912)
Purchases of Federal Home Loan Bank of New York stock		(13,500)
Redemption of Federal Home Loan Bank of New York stock	40,500	81,000
Purchases of premises and equipment, net	(2,754)	(2,300)
Net proceeds from sale of foreclosed real estate	17,041	11,503
Net Cash Provided by Investment Activities	1,200,474	8,153,815
Cash Flows from Financing Activities:
Net (decrease) increase in deposits	(386,219)	287,953
Proceeds from borrowed funds		6,500,000
Principal payments on borrowed funds	(900,000)	(15,322,092)
Dividends paid	(39,660)	(74,095)
Purchases of treasury stock	(427)
Exercise of stock options	3,438
Tax benefit from stock plans	1,063	89
Net Cash Used in Financing Activities	(1,321,805)	(8,608,145)
Net Increase (Decrease) in Cash and Cash Equivalents	76,608	(231,402)
Cash and Cash Equivalents at Beginning of Year	754,080	669,397	669,397
Cash and Cash Equivalents at End of Period	830,688	437,995	754,080
Supplemental Disclosures:
Interest paid	214,551	410,252
Loans transferred to foreclosed real estate	16,150	15,794
Income tax payments		8,900
Income tax refunds	$ (5,294)