CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Operating Activities
Net Income	$ 12,820	$ 10,076
Adjustments to reconcile net income to net cash provided by operating activities:
(Credit) provision for credit losses	(497)	579	$ 3,035
Depreciation and amortization expense	940	916
Purchase accounting accretion, net	(514)	(748)
Investment securities amortization and accretion, net	763	786
Stock-based compensation expense	431	366
Amortization of intangible assets	181	472
Net increase in other real estate owned valuation allowance and gain on disposition	0	27
Originations of mortgage loans held for sale	(46,641)	(33,629)
Proceeds from the sale of mortgage loans	46,426	44,320
Gain on sale of mortgage loans, net of origination costs	(1,220)	(1,280)
(Increase) decrease in other assets	(2,850)	3,283
Increase (decrease) in other liabilities	7,218	(20)
Net cash provided by operating activities	17,057	25,094
Investing Activities
Proceeds from maturities of held-to-maturity securities	750	0
Proceeds from the sale and maturity of available-for-sale securities	29,531	32,557
Purchase of available-for-sale securities	(50,152)	(77,286)
Net increase in loans	(7,008)	(50,049)
Purchase of Federal Home Loan Bank stock	(2,815)	(2,143)
Proceeds from sale of Federal Home Loan Bank and Federal Reserve Bank stock	3,472	0
Proceeds from the sale of other real estate owned	0	329
Recoveries of previously charged-off loans	122	183
Proceeds from the liquidation of equity investment	205	0
Purchase of premises and equipment	(595)	(264)
Proceeds from the sale of premises and equipment	0	137
Net cash used by investing activities	(26,490)	(96,536)
Financing Activities
Net increase in deposits	25,126	108,736
Net proceeds from (repayments of ) borrowings less than 90 days	10,816	(37,779)
Repayments of wholesale repurchase agreements	0	(5,000)
Exercise of stock options and issuance of restricted stock, net of repurchase for tax withholdings	(475)	(552)
Cash dividends paid on common stock	3,896	3,575
Net cash provided by financing activities	31,571	61,830
Net increase (decrease) in cash, cash equivalents and restricted cash	22,138	(9,612)
Cash, cash equivalents, and restricted cash at beginning of period	102,971	87,707	87,707
Cash, cash equivalents and restricted cash at end of period	125,109	78,095	$ 102,971
Supplemental information
Interest paid	6,384	4,549
Income taxes paid	$ 69	$ 57