CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
INTEREST AND DIVIDEND INCOME
Loans receivable, including fees	$ 234,290	$ 238,036	$ 451,449	$ 459,075
Investment securities	9,594	16,913	19,804	38,145
Securities purchased under resale agreements	5,435	4,758	10,964	9,072
Investment in Federal Home Loan Bank stock	1,021	167	1,550	387
Investment in Federal Reserve Bank stock	721	714	1,441	1,427
Due from banks and short-term investments	4,292	5,774	8,568	12,306
Total interest and dividend income	255,353	266,362	493,776	520,412
INTEREST EXPENSE
Customer deposit accounts	15,738	19,177	32,592	39,341
Federal funds purchased				2
Federal Home Loan Bank advances	1,047	1,353	2,086	3,495
Securities sold under repurchase agreements	10,217	11,591	20,746	23,313
Long-term debt	707	1,084	1,417	2,186
Total interest expense	27,709	33,205	56,841	68,337
Net interest income before provision for loan losses	227,644	233,157	436,935	452,075
Provision for loan losses, excluding covered loans	8,277	16,595	7,515	33,074
Provision for (reversal of) loan losses on covered loans	723	(1,095)	5,812	526
Net interest income after provision for loan losses	218,644	217,657	423,608	418,475
NONINTEREST (LOSS) INCOME
Impairment loss on investment securities				(5,165)
Less: Noncredit-related impairment loss recorded in other comprehensive income				5,066
Net impairment loss on investment securities recognized in earnings				(99)
Decrease in FDIC indemnification asset and receivable	(47,905)	(40,345)	(79,804)	(45,763)
Branch fees	8,119	7,821	15,773	15,484
Net gain on sales of investment securities	5,345	71	10,922	554
Net gain on sale of fixed assets	228	37	352	73
Letters of credit fees and commissions	5,426	4,538	10,488	8,813
Foreign exchange income	3,649	563	5,985	2,359
Ancillary loan fees	2,634	2,188	4,686	4,196
Income from life insurance policies	900	959	1,868	1,949
Net (loss) gain on sales of loans	(354)	6,375	(260)	11,554
Other operating income	9,604	6,138	15,537	10,965
Total noninterest (loss) income	(12,354)	(11,655)	(14,453)	10,085
NONINTEREST EXPENSE
Compensation and employee benefits	42,026	42,863	87,757	89,272
Occupancy and equipment expense	13,706	13,057	27,514	26,575
Amortization of investments in affordable housing partnerships and other investments	5,064	4,425	9,347	8,891
Amortization of premiums on deposits acquired	2,375	2,838	4,784	5,711
Deposit insurance premiums and regulatory assessments	3,875	3,323	7,657	7,315
Loan related expenses	3,573	4,175	7,157	8,656
Other real estate owned (gain on sale) expense	(1,188)	4,486	(2,172)	15,351
Legal expense	5,467	4,150	9,911	11,323
Prepayment penalty for FHLB advances		2,336		3,657
Data processing	2,200	2,197	4,637	4,661
Deposit related expenses	1,516	1,657	3,090	3,084
Consulting expense	1,003	1,568	1,457	3,035
Other operating expenses	14,803	14,533	29,636	28,840
Total noninterest expense	94,420	101,608	190,775	216,371
INCOME BEFORE PROVISION FOR INCOME TAXES	111,870	104,394	218,380	212,189
PROVISION FOR INCOME TAXES	37,855	33,837	72,274	73,549
NET INCOME	74,015	70,557	146,106	138,640
PREFERRED STOCK DIVIDENDS	1,714	1,714	3,428	3,428
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 72,301	$ 68,843	$ 142,678	$ 135,212
EARNINGS PER SHARE AVAILABLE TO COMMON STOCKHOLDERS
BASIC (in dollars per share)	$ 0.52	$ 0.48	$ 1.03	$ 0.93
DILUTED (in dollars per share)	$ 0.52	$ 0.47	$ 1.03	$ 0.92
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING
BASIC (in shares)	137,536	142,107	137,592	143,727
DILUTED (in shares)	137,816	147,786	141,573	149,414
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.15	$ 0.10	$ 0.30	$ 0.20