Consolidated Statements of Financial Condition (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
ASSETS
Cash and due from banks	$ 786,788	$ 206,897
Money market investments:
Federal funds sold		2,603
Time deposits with other financial institutions	605	955
Other short-term investments	216,327	236,111
Total money market investments	216,932	239,669
Investment securities available for sale, at fair value:
Securities pledged that can be repledged	1,070,375	1,167,265
Other investment securities	527,472	756,003
Total investment securities available for sale	1,597,847	1,923,268
Other equity securities	39,656	37,951
Investment in unconsolidated entities	32,300	43,401
Loans, net of allowance for loan and lease losses of $445,531 (2011-$493,917)	9,742,633	10,065,475
Loans held for sale, at lower of cost or market	68,349	15,822
Total loans, net	9,810,982	10,081,297
Premises and equipment, net	182,733	194,942
Other real estate owned	177,001	114,292
Accrued interest receivable on loans and investments	53,216	49,957
Other assets	242,292	235,601
Total assets	13,139,747	13,127,275
LIABILITIES
Non-interest-bearing deposits	780,717	705,789
Interest-bearing deposits	9,115,685	9,201,965
Total deposits	9,896,402	9,907,754
Securities sold under agreements to repurchase	900,000	1,000,000
Advances from the Federal Home Loan Bank (FHLB)	518,440	367,440
Notes payable (including $15,968 measured at fair value as of December 31, 2011)		23,342
Other borrowings	231,959	231,959
Accounts payable and other liabilities	108,829	152,636
Total liabilities	11,655,630	11,683,131
Commitments and Contingencies (Note 22)
Preferred stock, authorized 50,000,000 shares:
Common stock, $0.10 par value, authorized 2,000,000,000 shares; issued 206,674,221 shares (2011-205,794,024 shares issued)	20,667	20,579
Less: Treasury stock (at par value)	(49)	(66)
Common stock outstanding, 206,179,368 shares outstanding (2011-205,134,171 shares outstanding)	20,618	20,513
Additional paid-in capital	885,329	884,002
Retained earnings	472,631	457,384
Accumulated other comprehensive income, net of tax expense of $7,843 (2011-$7,751)	42,492	19,198
Total stockholders' equity	1,484,117	1,444,144
Total liabilities and stockholders' equity	13,139,747	13,127,275
Non-cumulative Perpetual Monthly Income Preferred Stock: issued 22,004,000 shares, outstanding - 2,521,872 shares, aggregate liquidation value of $63,047 [Member]
Preferred stock, authorized 50,000,000 shares:
Non-cumulative Perpetual Monthly Income Preferred Stock: issued-22,004,000 shares, outstanding-2,521,872 shares, aggregate liquidation value of $63,047	$ 63,047	$ 63,047