CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
INTEREST AND DIVIDEND INCOME
Loans receivable, including fees	$ 241,566	$ 261,571
Available-for-sale investment securities	10,184	12,276
Securities purchased under resale agreements	4,849	4,853
Investment in Federal Home Loan Bank and Federal Reserve Bank stock	1,236	1,871
Due from banks and short-term investments	5,426	5,602
Total interest and dividend income	263,261	286,173
INTEREST EXPENSE
Customer deposits	16,963	15,882
Federal Home Loan Bank advances	1,033	1,045
Securities sold under repurchase agreements	8,406	10,078
Long-term debt	1,142	1,202
Total interest expense	27,544	28,207
Net interest income before provision for loan losses	235,717	257,966
Provision for loan losses	4,987	6,933
Net interest income after provision for loan losses	230,730	251,033
NONINTEREST INCOME (LOSS)
Branch fees	9,384	9,446
Letters of credit fees and foreign exchange income	8,706	6,856
Ancillary loan fees	2,656	2,472
Wealth management fees	5,179	3,028
Derivative commission fee income	5,306	2,760
Changes in FDIC indemnification asset and receivable/payable	(8,422)	(53,634)
Net gains on sales of loans	9,551	6,196
Net gains on sales of available-for-sale investment securities	4,404	3,418
Other operating income	7,362	4,542
Total noninterest income (loss)	44,126	(14,916)
NONINTEREST EXPENSE
Compensation and employee benefits	64,253	59,277
Occupancy and equipment expense	15,443	15,851
Amortization of tax credit and other investments	6,299	1,492	[1]
Amortization of premiums on deposits acquired	2,391	2,500
Deposit insurance premiums and regulatory assessments	5,656	5,702
Loan related expenses	2,340	2,575
Other real estate owned (income) expense	(1,026)	1,334
Legal expense	6,870	3,799
Data processing	2,617	8,200
Other operating expenses	23,187	19,224
Total noninterest expense	128,030	119,954	[1]
INCOME BEFORE INCOME TAXES	146,826	116,163	[1]
INCOME TAX EXPENSE	46,799	41,992	[1]
NET INCOME	$ 100,027	$ 74,171	[1]
EARNINGS PER SHARE
BASIC (in dollars per share)	$ 0.70	$ 0.52	[1]
DILUTED (in dollars per share)	$ 0.69	$ 0.52	[1]
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING
BASIC (in shares)	143,655	141,962
DILUTED (in shares)	144,349	142,632
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.20	$ 0.18

[1] Prior periods were restated to reflect the retrospective application of adopting the new accounting guidance related to the Company?s investments in qualified affordable housing projects Accounting Standard Update ("ASU") 2014-01. See Note 10 of the Notes to Consolidated Financial Statements for additional information.