Unaudited Condensed Consolidated Statements of Financial Condition (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Assets
Cash on hand and in banks	$ 116,267	$ 109,995
Federal funds sold	14,055	10,527
Interest bearing cash deposits	31,369	35,135
Cash and cash equivalents	161,691	155,657
Investment securities, available-for-sale	2,669,180	3,222,829
Investment securities, held-to-maturity	481,476	0
Total investment securities	3,150,656	3,222,829
Loans held for sale	36,133	46,738
Loans receivable	4,088,629	4,062,838
Allowance for loan and lease losses	(130,729)	(130,351)
Loans receivable, net	3,957,900	3,932,487
Premises and equipment, net	166,757	167,671
Other real estate owned	27,332	26,860
Accrued interest receivable	41,274	41,898
Deferred tax asset	39,997	43,549
Core deposit intangible, net	8,802	9,512
Goodwill	129,706	129,706
Non-marketable equity securities	52,192	52,192
Other assets	58,283	55,251
Total assets	7,830,723	7,884,350
Liabilities
Non-interest bearing deposits	1,396,272	1,374,419
Interest bearing deposits	4,228,193	4,205,548
Securities sold under agreements to repurchase	327,322	313,394
Federal Home Loan Bank advances	686,744	840,182
Other borrowed funds	8,069	8,387
Subordinated debentures	125,597	125,562
Accrued interest payable	3,173	3,505
Other liabilities	70,393	50,103
Total liabilities	6,845,763	6,921,100
Stockholders' Equity
Preferred shares, $0.01 par value per share, 1,000,000 shares authorized, none issued or outstanding	0	0
Common stock, $0.01 par value per share, 117,187,500 shares authorized	745	744
Paid-in capital	692,196	690,918
Retained earnings - substantially restricted	276,731	261,943
Accumulated other comprehensive income	15,288	9,645
Total stockholders' equity	984,960	963,250
Total liabilities and stockholders' equity	$ 7,830,723	$ 7,884,350
Number of common stock shares issued and outstanding	74,465,666	74,373,296