Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Cash Flows [Abstract]
Net Income	$ 9,840	$ 11,389
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Accretion of purchased credit impaired loans	(20,843)	(24,840)
Depreciation and amortization	4,223	4,655
Impairment of premises and equipment	0	1,525
Provision (reversal) for loan and lease losses	1,375	(841)
Deferred income tax	4,389	6,015
Net amortization of investment securities premium/discount	1,123	1,663
Net realized gains on investment securities	(40)	(90)
Stock-based compensation expense	317	284
Net gains on sales of OREO	(679)	(7)
OREO valuation expense	467	1,390
Other	(6)	2
Net deferred loan origination fees	1,105	(839)
Mortgage loans originated for sale	(29,550)	(49,165)
Proceeds from sales of mortgage loans originated for sale	33,021	43,425
Fees on mortgage loans originated and sold	(971)	(1,147)
FDIC indemnification asset expense	0	2,439
Termination of loss share agreements	9,178	0
Gains on sales/disposals of premises and equipment	(20)	(3)
Net proceeds from FDIC loss share agreements	(186)	276
Change in other assets	61	(1,685)
Change in accrued expenses and other liabilities	(2,652)	(18,300)
Net cash provided by (used in) operating activities	10,152	(23,854)
Cash flows from investing activities
Purchases of investment securities available-for-sale	(35,489)	(54,469)
Purchases of investment securities held-to-maturity	(4,000)	(29,911)
Proceeds from sale of investment securities available-for-sale	0	20,328
Repayments of principal and maturities of investment securities available-for-sale	15,824	18,023
Repayments of principal and maturities of investment securities held-to-maturity	17,359	18,243
Net purchases of FHLB and FRB stock	1,993	(1,997)
Net decrease (increase) in loans	12,854	(49,467)
Proceeds paid to FDIC for settlement of loss share agreements	(3,029)	0
Purchases of premises and equipment	(721)	(547)
Proceeds from sales of premises and equipment	550	0
Proceeds from sales of OREO	7,072	7,887
Net cash provided by (used in) investing activities	12,413	(71,910)
Cash flows from financing activities
Net increase in demand, money market and savings accounts	162,935	99,035
Net (decrease) increase in time deposits	(83,412)	9,421
Net change in short-term borrowings	3,790	4,198
Repayment of short-term FHLB advances	(215,000)	(500,000)
Proceeds from short-term FHLB advances	155,000	560,000
Decrease in long-term FHLB advances	(49)	(48)
Excess tax benefit from share-based payment	19	0
Proceeds from exercise of stock options	180	0
Dividends paid	(4,314)	0
Purchases of treasury stock	(4,390)	(24,996)
Net cash provided by financing activities	14,759	147,610
Net increase in cash and cash equivalents	37,324	51,846
Cash and cash equivalents at beginning of period	144,696	188,135
Cash and cash equivalents at end of period	182,020	239,981
Supplemental disclosures of cash:
Interest paid	5,390	3,527
Cash collections of contractual interest on purchased credit impaired loans	11,764	15,642
Income taxes paid	189	930
Supplemental disclosures of non-cash transactions:
OREO acquired through loan transfers	998	3,098
Transfers of other assets to OREO	$ 1,590	$ 0