CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Operating Activities
Net Income	$ 11,339	$ 10,903	$ 31,649	$ 29,165
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	817	1,279	2,797	5,003	$ 5,258
Depreciation and amortization expense			2,789	3,498
Purchase accounting accretion, net			(2,204)	(3,792)
Investment securities amortization and accretion, net			2,350	2,234
Stock-based compensation expense			1,135	1,521
Amortization of intangible assets	473	475	1,417	1,427
Net gain on sale of investment securities			(827)	(4)
Net increase in other real estate owned valuation allowance and gain on disposition			60	147
Originations of mortgage loans held for sale			(148,661)	(180,182)
Proceeds from the sale of mortgage loans			155,086	170,765
Gain on sale of mortgage loans, net of origination costs			(4,323)	(4,171)
(Increase) decrease in other assets			(82)	7,533
Increase in other liabilities			1,325	154
Net cash provided by operating activities			42,391	33,004
Investing Activities
Proceeds from the sale and maturity of available-for-sale securities			124,548	105,863
Purchase of available-for-sale securities			(127,684)	(130,254)
Purchase of held-to-maturity securities			0	(10,448)
Net increase in loans			(153,629)	(101,732)
Purchase of bank-owned life insurance, net of death benefit proceeds			(7,000)	(16,122)
Purchase of Federal Home Loan Bank and Federal Reserve Bank stock			(8,304)	(7,341)
Proceeds from sale of Federal Home Loan Bank and Federal Reserve Bank stock			6,947	5,652
Proceeds from the sale of other real estate owned			641	672
Recoveries of previously charged-off loans			442	381
Purchase of premises and equipment			(2,378)	(1,507)
Proceeds from the sale of premises and equipment			137	90
Net cash used by investing activities			(166,280)	(154,746)
Financing Activities
Net increase in deposits			128,131	163,563
Net proceeds from borrowings less than 90 days			33,841	36,846
Repayments on Federal Home Loan Bank long-term advances			(20,000)	(25,000)
Repayments of wholesale repurchase agreements			(5,000)	(25,000)
Exercise of stock options and issuance of restricted stock, net of repurchase for tax withholdings			(615)	593
Cash dividends paid on common stock			10,740	9,290
Net cash provided by financing activities			125,617	141,712
Net increase in cash and cash equivalents			1,728	19,970
Cash and cash equivalents at beginning of period			87,707	79,488	79,488
Cash and cash equivalents at end of period	$ 89,435	$ 99,458	89,435	99,458	$ 87,707
Supplemental information
Interest paid			15,383	12,673
Unsettled purchases of investment securities			13,954	0
Income taxes paid			11,559	4,844
Transfer from loans to other real estate owned			0	32
SBM Financial, Inc. acquisition measurement-period adjustments			$ 0	$ 960