Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
OPERATING ACTIVITIES:
Net income	$ 23,653,000	$ 21,919,000	$ 12,893,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,100,000	2,050,000	1,650,000
Net amortization of purchase premiums and discounts on securities	189,000	220,000	290,000
Depreciation and amortization	1,619,000	1,937,000	1,238,000
Deferred income tax (benefit) expense	(299,000)	(1,262,000)	1,546,000
Net security (gains) losses	(52,000)	4,000	(62,000)
Stock compensation expense	1,271,000	1,053,000	746,000
(Gain) loss on sale of OREO	(16,000)	(169,000)	245,000
Valuation writedowns on OREO	0	0	151,000
Gain on sale of mortgage loans held for sale, net	(2,143,000)	(1,390,000)	(1,699,000)
Gain on sale of SBA loans held for sale, net	(909,000)	(1,680,000)	(1,617,000)
Origination of mortgage loans held for sale	(120,173,000)	(80,729,000)	(82,088,000)
Origination of SBA loans held for sale	(10,246,000)	(9,510,000)	(24,394,000)
Proceeds from sale of mortgage loans held for sale, net	122,316,000	82,119,000	83,787,000
Proceeds from sale of SBA loans held for sale, net	15,768,000	23,939,000	20,998,000
BOLI income	(588,000)	(975,000)	(469,000)
Gain on sale of premises and equipment	(766,000)	0	0
Net change in other assets and liabilities	1,480,000	1,064,000	1,234,000
Net cash provided by operating activities	33,204,000	38,590,000	14,449,000
INVESTING ACTIVITIES
Purchases of securities held to maturity	0	0	(163,000)
Purchase of equity securities	0	(1,133,000)	0
Purchases of securities available for sale	(13,084,000)	(579,000)	(29,382,000)
Purchases of FHLB stock, at cost	(90,644,000)	(72,115,000)	(17,408,000)
Maturities and principal payments on securities held to maturity	633,000	1,393,000	4,278,000
Maturities and principal payments on securities available for sale	5,441,000	5,396,000	13,220,000
Proceeds from sales of securities held to maturity	0	0	529,000
Proceeds from sales of equity securities	198,000	0	0
Proceeds from sales of securities available for sale	5,606,000	0	2,777,000
Proceeds from redemption of FHLB stock	87,255,000	74,183,000	10,583,000
Proceeds from sale of OREO	269,000	440,000	1,034,000
Net increase in loans	(128,876,000)	(147,223,000)	(193,592,000)
Proceeds from BOLI	0	492,000	0
Purchase of BOLI	(1,025,000)	0	(10,000,000)
Proceeds from sale of premises and equipment	1,821,000	0	0
Purchases of premises and equipment	(709,000)	(1,507,000)	(1,509,000)
Net cash used in investing activities	(133,115,000)	(140,653,000)	(219,633,000)
FINANCING ACTIVITIES
Net increase in deposits	42,427,000	164,550,000	97,414,000
Proceeds from new borrowings	283,000,000	210,000,000	220,000,000
Repayments of borrowings	(210,000,000)	(275,000,000)	(66,000,000)
Proceeds from exercise of stock options	453,326	576,119	509,047
Market value of shares withheld to cover employee tax liability	(213,000)	0	0
Dividends on common stock	(3,255,000)	(2,802,000)	(2,380,000)
Net cash provided by financing activities	112,412,000	97,324,000	249,543,000
Increase (decrease) in cash and cash equivalents	12,501,000	(4,739,000)	44,359,000
Cash and cash equivalents, beginning of year	145,515,000	150,254,000	105,895,000
Cash and cash equivalents, end of year	158,016,000	145,515,000	150,254,000
SUPPLEMENTAL DISCLOSURES
Interest paid	18,006,000	13,546,000	9,447,000
Income taxes paid	8,222,000	5,941,000	7,002,000
Noncash investing activities:
Transfer of securities held to maturity to available for sale	14,221,000	0	0
Establishment of lease liability and right-of-use asset	3,234,000	0	0
Transfer of SBA loans held for sale to held to maturity	0	0	13,000
Capitalization of servicing rights	643,000	938,000	172,000
Transfer of loans to OREO	$ 2,151,000	$ 127,000	$ 872,000