Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Cash Flows From Operating Activities
Net income	$ 7,005	$ 5,579	$ 20,237	$ 17,901
Reconciliation of net income to net cash provided by operating activities:
Provision (reversal) for loan losses	(1,414)	$ 1,485	(737)	8,719
Net security premium amortization			2,380	1,416
Purchase accounting accretion and amortization, net			2,265	(7,261)
Foreclosed property losses and write-downs, net			1,522	3,981
Loss (gain) on securities available for sale	1		1	(786)
Other losses			241	282
Decrease in net deferred loan costs			181	198
Depreciation of premises and equipment			$ 3,375	3,477
Branch consolidation expense				925
Stock-based compensation expense			$ 554	248
Amortization of intangible assets	181	$ 194	541	582
Origination of presold mortgages in process of settlement			(76,728)	(75,775)
Proceeds from sales of presold mortgages in process of settlement			79,600	75,568
Decrease (increase) in accrued interest receivable			(88)	764
Decrease (increase) in other assets			(990)	7,302
Decrease in accrued interest payable			(98)	(184)
Decrease in other liabilities			(667)	(429)
Net cash provided by operating activities			31,589	36,928
Cash Flows From Investing Activities
Purchases of securities available for sale			(83,313)	$ (54,258)
Purchases of securities held to maturity			$ (2,003)
Proceeds from sales of securities available for sale				$ 47,473
Proceeds from maturities/issuer calls of securities available for sale			$ 61,426	$ 22,456
Proceeds from maturities/issuer calls of securities held to maturity			19,246
Purchases of Federal Reserve Bank stock and Federal Home Loan Bank stock, net			(9,597)	$ (2,122)
Net decrease (increase) in loans			(98,347)	27,468
Proceeds from FDIC loss share agreements			8,758	16,810
Proceeds from sales of foreclosed real estate			6,426	27,908
Purchases of premises and equipment			(3,828)	(3,278)
Proceeds from sale of premises and equipment			847	1,232
Net cash provided (used) by investing activities			(100,385)	83,689
Cash Flows From Financing Activities
Net increase (decrease) in deposits			11,847	(72,000)
Net increase in borrowings			60,000	70,000
Cash dividends paid - common stock			(4,732)	(4,726)
Cash dividends paid - preferred stock			(646)	$ (651)
Redemption of preferred stock			(32,000)
Proceeds from stock option exercises			32
Net cash provided (used) by financing activities			34,501	$ (7,377)
Increase (decrease) in cash and cash equivalents			(34,295)	113,240
Cash and cash equivalents, beginning of period			253,084	223,274	$ 223,274
Cash and cash equivalents, end of period	$ 218,789	$ 336,514	218,789	336,514	$ 253,084
Supplemental Disclosures of Cash Flow Information:
Cash paid during the period for interest			5,252	6,503
Cash paid during the period for income taxes			11,139	3,009
Non-cash transactions:
Unrealized gain (loss) on securities available for sale, net of taxes			(94)	133
Foreclosed loans transferred to other real estate			$ 6,700	$ 10,083