Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities:
Net income	$ 6,572	$ 13,459	$ 12,530
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	2,677	2,573	2,511
Deferred income taxes	9,405	(23)	1,378
Provision for loan losses	16,435	18,040	15,512
Provision for indemnifications	186	290	274
Provision for other real estate owned losses		135	90
Share-based compensation	1,451	1,218	1,231
Net accretion of certain acquisition-related fair value adjustments	(1,096)	(1,446)	(1,918)
Net amortization of discounts and amortization of premiums on securities	1,928	1,458	1,551
Amortization of other intangibles	160	13
Realized gains on maturities, calls and sales of securities	(10)	(52)	(29)
Net realized gains on sales of other real estate owned	(10)	(134)	(242)
Net realized gains on sale of corporate premises and equipment	(45)	(246)	(26)
Income from bank-owned life insurance	(433)	(927)	(454)
Origination of loans held for sale	(744,780)	(674,317)	(549,287)
Proceeds from sales of loans held for sale	749,976	674,410	539,902
Gains on sales of loans held for sale	(8,553)	(8,120)	(6,336)
Change in other assets and liabilities:
Accrued interest receivable	(328)	(432)	(408)
Other assets	(6,589)	(3,650)	(2,429)
Accrued interest payable	135	5	(42)
Other liabilities	(490)	4,991	1,524
Net cash provided by operating activities	26,591	27,245	15,332
Investing activities:
Proceeds from maturities, calls and sales of securities available for sale and payments on mortgage-backed securities	41,520	57,355	36,450
Purchases of securities available for sale	(53,461)	(52,547)	(37,211)
Net purchases of restricted stocks	(40)	(58)	97
Purchase of loan portfolio			(16,258)
Net increase in loans	(44,541)	(110,601)	(65,639)
Other real estate owned improvements		(20)
Proceeds from sales of other real estate owned	245	1,384	706
Purchases of corporate premises and equipment, net	(3,891)	(1,691)	(1,808)
Net cash used in investing activities	(60,168)	(106,178)	(83,663)
Financing activities:
Net increase in demand, interest-bearing demand and savings deposits	47,970	41,605	74,307
Net increase (decrease) in time deposits	3,538	4,683	(26,450)
Net increase (decrease) in borrowings	3,257	(12,730)	10,198
Issuance of common stock	147	149	135
Purchase of common stock, including shares withheld to pay taxes	(560)	(414)	(1,687)
Proceeds from exercise of stock options	84	362	1,303
Cash dividends	(4,637)	(4,464)	(4,148)
Net cash provided by (used in) financing activities	49,799	29,191	53,658
Net increase (decrease) in cash and cash equivalents	16,222	(49,742)	(14,673)
Cash and cash equivalents at beginning of year	103,201	152,943	167,616
Cash and cash equivalents at end of year	119,423	103,201	152,943
Supplemental disclosure
Interest paid	9,430	8,927	9,026
Income taxes paid	5,133	2,311	560
Supplemental disclosure of noncash investing and financing activities
Unrealized losses on securities available for sale	(1,325)	(3,238)	(2,090)
Transfers from loans to other real estate owned	208	618	824
Pension adjustment	242	(189)	(789)
Unrealized gains (losses) on cash flow hedging instruments	$ 223	$ 119	$ (72)