Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 36,600	$ 26,684	$ 21,840
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	8,667	7,462	2,826
Depreciation, amortization and accretion, net	7,881	8,134	7,936
Change in cash surrender value of bank owned life insurance	(1,337)	(1,126)	(671)
Insured Event, Gain (Loss)	0	511	0
Stock-based compensation expense	294	954	384
Gains on investment securities, net	(901)	(616)	(1,192)
Loss (gain) on sales of other real property owned, net	132	667	(1)
Donation of building	0	0	653
Loss on write down of premises and equipment	30	11	28
Gain (Loss) on Sales of Loans, Net	0	(698)	0
Gains on sale of loans held for sale, net	(1,070)	(1,102)	(1,224)
Deferred income taxes	4,283	2,498	(2,388)
Increase in accrued interest receivable	(1,708)	(279)	(629)
Increase (decrease) in accrued interest payable	829	94	(84)
Origination of loans held for sale	(62,623)	(67,321)	(79,682)
Proceeds from sale of loans held for sale	63,210	68,573	80,699
(Increase) decrease in other assets	(4,266)	668	1,802
Increase (decrease) in other liabilities	(7,846)	666	(2,875)
Net cash provided by operating activities	42,175	46,154	27,422
Cash flows from investing activities:
Proceeds from maturities of certificates of deposit investments	1,486	12,958	25,245
Purchases of certificates of deposit investments	0	0	(12,958)
Proceeds from sales of securities available-for-sale	13,152	159,663	70,757
Proceeds from maturities of securities held-to-maturity	55,035	73,310	117,003
Proceeds from maturities of securities available-for-sale	0	0	83,000
Purchases of securities available-for-sale	(38,852)	(183,319)	(194,946)
Purchases of securities held-to-maturity	0	0	(71,557)
Net increase in loans	(96,665)	(123,931)	(106,608)
Proceeds from sale of premises and equipment	0	0	147
Purchases of premises and equipment	(3,112)	(1,274)	(695)
Proceeds from sales of other real property owned	1,606	5,559	793
Investment in bank owned life insurance	0	0	(25,000)
Capitalization of mortgage servicing rights	0	0	(14)
Proceeds from Life Insurance Policy	0	1,072	0
Cash received related to acquisition, net of cash and cash equivalents acquired	56,389	0	36,774
Net cash used in investing activities	(10,961)	(55,962)	(78,059)
Cash flows from financing activities:
Net (decrease) increase in deposits	(19,548)	(55,248)	60,632
(Decrease) Increase in repurchase agreements	15,762	(30,375)	33,658
Proceeds from FHLB advances	45,000	52,000	20,000
Repayment of FHLB advances	(35,000)	(32,000)	(15,000)
Proceeds from short-term debt	0	0	7,000
Repayment of short-term debt	0	(4,000)	(3,938)
Proceeds from long-term debt	0	0	15,000
Repayments of Long-term Debt	10,313	3,750	0
Proceeds from issuance of common stock	36,645	4,399	195
Direct expenses related to capital transactions	(2,309)	(216)	(229)
Purchase of treasury stock	(138)	(797)	0
Dividends paid on preferred stock	0	0	(1,286)
Dividends paid on common stock	(8,792)	(7,228)	(5,277)
Net cash provided by (used in) financing activities	21,307	(77,215)	110,755
Increase (decrease) in cash and cash equivalents	52,521	(87,023)	60,118
Cash and cash equivalents at beginning of period	88,879	175,902	115,784
Cash and cash equivalents at end of period	141,400	88,879	175,902
Cash paid during the period for:
Interest	11,671	6,415	4,113
Income taxes	9,645	11,721	13,135
Supplemental disclosures of noncash investing and financing activities
Loans transferred to other real estate owned	518	6,034	328
Dividends reinvested in common stock	1,099	1,057	1,323
Net tax benefit related to option and deferred compensation plans	160	221	140
Conversion of preferred stock	0	0	27,500
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed [Abstract]
Fair value of assets acquired			668,905
Cash paid			22,545
Common stock issued			65,926
Total consideration paid			88,471
Fair value of liabilities assumed			$ 580,434