Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets
Cash and due from banks	$ 245,860	$ 153,747
Short-term investments and interest bearing deposits	803,576	516,938
Securities available-for-sale (amortized cost of $1,354,885 in 2014 and $1,637,965 in 2013)	1,339,989	1,586,668
Trading securities		4,936
Loans	8,565,278	8,084,563
Less: Allowance for loan losses	(169,077)	(173,889)
Unamortized deferred loan fees, net	(13,501)	(13,487)
Loans, net	8,382,700	7,897,187
Federal Home Loan Bank stock	25,671	25,000
Other real estate owned, net	34,835	52,985
Affordable housing investments, net	88,277	84,108
Premises and equipment, net	101,758	102,045
Customers’ liability on acceptances	19,915	32,194
Accrued interest receivable	24,723	24,274
Goodwill	316,340	316,340
Other intangible assets, net	1,929	2,230
Other assets	171,249	190,634
Total assets	11,556,822	10,989,286
Deposits
Non-interest-bearing demand deposits	1,524,577	1,441,858
Interest-bearing deposits:
NOW deposits	698,671	683,873
Money market deposits	1,410,123	1,286,338
Savings deposits	501,065	499,520
Time deposits under $100,000	1,112,673	931,204
Time deposits of $100,000 or more	3,333,487	3,138,512
Total deposits	8,580,596	7,981,305
Securities sold under agreements to repurchase	700,000	800,000
Advances from the Federal Home Loan Bank	521,200	521,200
Other borrowings for affordable housing investments	18,985	19,062
Long-term debt	119,136	121,136
Acceptances outstanding	19,915	32,194
Other liabilities	58,628	55,418
Total liabilities	10,018,460	9,530,315
Commitments and contingencies	0	0
Stockholders’ Equity
Common stock, $0.01 par value, 100,000,000 shares authorized, 83,878,550 issued and 79,670,985 outstanding at June 30, 2014, and 83,797,434 issued and 79,589,869 outstanding at December 31, 2013	839	838
Additional paid-in-capital	786,259	784,489
Accumulated other comprehensive loss, net	(8,896)	(29,729)
Retained earnings	885,896	829,109
Treasury stock, at cost (4,207,565 shares at June 30, 2014, and at December 31, 2013)	(125,736)	(125,736)
Total equity	1,538,362	1,458,971
Total liabilities and equity	$ 11,556,822	$ 10,989,286