Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Cash Flows [Abstract]
Net cash provided by operating activities	$ 14,433	$ 4,462
Investing activities:
Purchases of investment securities available-for-sale	(3)	(145,318)
Purchases of investment securities held to maturity	0	(5,116)
Proceeds from maturities, calls, sales and prepayments of investment securities available-for-sale	26,937	28,391
Proceeds from maturities and calls of investment securities held-to-maturity	1,322	438
Proceeds from redemption of FHLB stock	5,494	10,283
Purchases of FHLB stock	(6,064)	(10,420)
Loan originations, net of collections	(10,816)	(96,179)
Purchases of premises and equipment	(288)	(512)
Proceeds from sales of premises and equipment	0	28
Proceeds from sales of other assets	720	0
Proceeds from sales of OREO	(50)	0
Net cash assumed in Bank of America branch acquisition	0	456,611
Net cash used in investing activities	17,252	238,206
Financing activities:
Net increase in deposits	52,968	23,061
Proceeds from stock options exercised	38	0
Tax effect of non-vested restricted stock	0	(11)
FHLB advance borrowings	145,902	257,000
Repayment of FHLB advances	(145,902)	(257,000)
Net cash provided by financing activities	53,006	23,050
Net increase in cash and cash equivalents	84,691	265,718
Cash and cash equivalents at beginning of period	72,577	77,805
Cash and cash equivalents at end of period	157,268	343,523
Supplemental disclosures of cash flow information:
Interest paid	762	7,077
Taxes paid	490	195
Transfers of property, plant & equipment to other assets	$ 2,307	$ 0