CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 1,736,865	$ 1,323,106
Short-term investments	379,029	366,378
Securities purchased under resale agreements	1,400,000	1,450,000
Investment securities available-for-sale, at fair value (with amortized cost of $2,578,384 at March 31, 2013 and $2,599,018 at December 31, 2012)	2,588,993	2,607,029
Loans held for sale	226,635	174,317
Loans receivable, excluding covered loans (net of allowance for loan losses of $228,796 at March 31, 2013 and $229,382 at December 31, 2012)	12,119,903	11,710,190
Covered loans (net of allowance for loan losses of $10,110 at March 31, 2013 and $5,153 at December 31, 2012)	2,752,269	2,935,595
Total loans receivable, net	14,872,172	14,645,785
FDIC indemnification asset	276,834	316,313
Other real estate owned, net	32,324	32,911
Other real estate owned covered, net	28,567	26,808
Total other real estate owned	60,891	59,719
Investment in Federal Home Loan Bank stock, at cost	96,795	107,275
Investment in Federal Reserve Bank stock, at cost	48,036	48,003
Investment in affordable housing partnerships	181,928	185,645
Premises and equipment, net	109,485	107,517
Accrued interest receivable	103,392	94,837
Due from customers on acceptances	22,662	28,612
Premiums on deposits acquired, net	53,875	56,285
Goodwill	337,438	337,438
Cash surrender value of life insurance policies	110,860	110,133
Other assets	496,065	517,718
TOTAL	23,101,955	22,536,110
Customer deposit accounts:
Noninterest-bearing	4,838,523	4,535,877
Interest-bearing	14,097,179	13,773,477
Total deposits	18,935,702	18,309,354
Federal Home Loan Bank advances	313,494	312,975
Other borrowings		20,000
Bank acceptances outstanding	22,662	28,612
Long-term debt	137,178	137,178
Accrued expenses and other liabilities	354,800	350,869
Total liabilities	20,758,836	20,153,988
COMMITMENTS AND CONTINGENCIES (Note 12)
STOCKHOLDERS' EQUITY
Preferred stock, $0.001 par value, 5,000,000 shares authorized; Series A, non-cumulative convertible, 200,000 shares issued and 85,710 shares outstanding in 2013 and 2012	83,027	83,027
Common stock, $0.001 par value, 200,000,000 shares authorized; 157,354,024 and 157,160,193 shares issued in 2013 and 2012, respectively; 136,578,350 and 140,294,092 shares outstanding in 2013 and 2012, respectively	157	157
Additional paid in capital	1,470,674	1,464,739
Retained earnings	1,201,126	1,151,828
Treasury stock, at cost - 20,775,674 shares in 2013 and 16,866,101 shares in 2012	(418,050)	(322,298)
Accumulated other comprehensive income, net of tax	6,185	4,669
Total stockholders' equity	2,343,119	2,382,122
TOTAL	$ 23,101,955	$ 22,536,110