Condensed Consolidated Statements of Financial Condition (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets
Cash on hand and in banks	$ 98,772	$ 104,674
Interest bearing cash deposits	73,627	23,358
Cash and cash equivalents	172,399	128,032
Investment securities, available-for-sale	3,586,355	3,126,743
Loans held for sale	118,986	95,457
Loans receivable	3,408,094	3,466,135
Allowance for loan and lease losses	(136,660)	(137,516)
Loans receivable, net	3,271,434	3,328,619
Premises and equipment, net	159,386	158,872
Other real estate owned	57,650	78,354
Accrued interest receivable	39,359	34,961
Deferred tax asset	20,462	31,081
Core deposit intangible, net	6,665	8,284
Goodwill	106,100	106,100
Non-marketable equity securities	50,363	49,694
Other assets	43,046	41,709
Total assets	7,632,205	7,187,906
Liabilities
Non-interest bearing deposits	1,180,066	1,010,899
Interest bearing deposits	4,023,031	3,810,314
Securities sold under agreements to repurchase	414,836	258,643
Federal Home Loan Bank advances	917,021	1,069,046
Other borrowed funds	10,152	9,995
Subordinated debentures	125,382	125,275
Accrued interest payable	4,654	5,825
Other liabilities	66,906	47,682
Total liabilities	6,742,048	6,337,679
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	719	719
Paid-in capital	641,737	642,882
Retained earnings - substantially restricted	199,845	173,139
Accumulated other comprehensive income	47,856	33,487
Total stockholders' equity	890,157	850,227
Total liabilities and stockholders' equity	$ 7,632,205	$ 7,187,906
Number of common stock shares issued and outstanding	71,937,222	71,915,073