CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 1,884,855	$ 895,820
Short-term investments	323,266	257,473
Securities purchased under resale agreements	1,200,000	1,300,000
Investment securities available-for-sale, at fair value (with amortized cost of $2,504,755 at March 31, 2014 and $2,786,490 at December 31, 2013)	2,474,744	2,733,797
Loans held for sale	577,353	204,970
Loans receivable, excluding covered loans (net of allowance for loan losses of $245,618 at March 31, 2014 and $241,930 at December 31, 2013)	17,053,444	15,412,715
Covered loans (net of allowance for loan losses of $6,518 at March 31, 2014 and $7,745 at December 31, 2013)	2,028,806	2,187,898
Total loans receivable, net	19,082,250	17,600,613
FDIC indemnification asset	27,552	74,708
Other real estate owned, net	28,421	18,900
Other real estate owned covered, net	30,610	21,373
Total other real estate owned	59,031	40,273
Investment in Federal Home Loan Bank stock, at cost	52,110	62,330
Investment in Federal Reserve Bank stock, at cost	50,370	48,333
Investment in affordable housing partnerships	189,303	164,776
Premises and equipment, net	185,214	177,710
Accrued interest receivable	102,802	116,314
Due from customers on acceptances	22,407	21,236
Premiums on deposits acquired, net	53,013	46,920
Goodwill	458,467	337,438
Cash surrender value of life insurance policies	128,772	112,650
Other assets	529,517	534,707
TOTAL	27,401,026	24,730,068
Customer deposit accounts:
Noninterest-bearing	6,636,874	5,821,899
Interest-bearing	16,191,183	14,591,019
Total deposits	22,828,057	20,412,918
Federal Home Loan Bank advances	315,620	315,092
Securities sold under repurchase agreements	1,005,316	995,000
Bank acceptances outstanding	22,407	21,236
Long-term debt	240,675	226,868
Accrued expenses and other liabilities	364,731	394,729
Total liabilities	24,776,806	22,365,843
COMMITMENTS AND CONTINGENCIES (Note 13)
STOCKHOLDERS' EQUITY
Common stock, $0.001 par value, 200,000,000 shares authorized; 163,454,195 and 163,098,008 shares issued in 2014 and 2013, respectively; 143,367,652 and 137,630,896 shares outstanding in 2014 and 2013, respectively	163	163
Additional paid in capital	1,656,867	1,571,670
Retained earnings	1,410,921	1,360,130
Treasury stock, at cost - 20,086,543 shares in 2014 and 25,467,112 shares in 2013	(426,694)	(537,279)
Accumulated other comprehensive loss, net of tax	(17,037)	(30,459)
Total stockholders' equity	2,624,220	2,364,225
TOTAL	$ 27,401,026	$ 24,730,068