Condensed Consolidated Statements of Financial Condition (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash on hand and in banks	$ 105,272	$ 123,270
Interest bearing cash deposits and federal funds sold	27,184	63,770
Cash and cash equivalents	132,456	187,040
Investment securities, available-for-sale	3,721,377	3,683,005
Loans held for sale	95,495	145,501
Loans receivable	3,673,456	3,397,425
Allowance for loan and lease losses	(130,883)	(130,854)
Loans receivable, net	3,542,573	3,266,571
Premises and equipment, net	161,918	158,989
Other real estate owned	40,713	45,115
Accrued interest receivable	43,593	37,770
Deferred tax asset	35,115	20,394
Core deposit intangible, net	7,262	6,174
Goodwill	119,509	106,100
Non-marketable equity securities	49,752	48,812
Other assets	47,053	41,969
Total assets	7,996,816	7,747,440
Liabilities
Non-interest bearing deposits	1,236,104	1,191,933
Interest bearing deposits	4,122,093	4,172,528
Securities sold under agreements to repurchase	300,024	289,508
Federal Home Loan Bank advances	1,217,445	997,013
Other borrowed funds	8,489	10,032
Subordinated debentures	125,490	125,418
Accrued interest payable	3,824	4,675
Other liabilities	54,345	55,384
Total liabilities	7,067,814	6,846,491
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	736	719
Paid-in capital	672,035	641,737
Retained earnings - substantially restricted	232,849	210,531
Accumulated other comprehensive income	23,382	47,962
Total stockholders' equity	929,002	900,949
Total liabilities and stockholders' equity	$ 7,996,816	$ 7,747,440
Number of common stock shares issued and outstanding	73,564,900	71,937,222