Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Cash Flows from Operating Activities
Net income	$ 4,168	$ 4,252	$ 11,129	$ 12,689
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	154	95	1,985	350	$ 126
Depreciation of bank premises and equipment			529	552
Amortization of premiums and accretion of discounts, net			1,016	52
Gains on disposal of fixed assets			(2)	(6)
Gain on sales and calls of securities available for sale, net			(96)	(182)
Loss (gain) and write-down on other real estate owned, net			(13)	5
Loss on sale of repossessed assets, net			1	4
Increase in cash value of bank-owned life insurance			(659)	(681)
Origination of mortgage loans held for sale			(27,929)	(15,191)
Proceeds from sale of mortgage loans held for sale			25,560	13,127
Gain on sale of mortgage loans held for sale			(416)	(197)
Net change in:
Accrued interest receivable			(953)	927
Other assets			(136)	416
Accrued interest payable			(58)	44
Other liabilities			192	452
Net cash provided by operating activities			10,150	12,361
Cash Flows from Investing Activities
Net change in interest-bearing deposits			8,102	(91,999)
Proceeds from calls, principal payments, sales and maturities of securities available for sale			116,567	235,900
Purchase of securities available for sale			(154,781)	(134,854)
Net change in restricted stock			(59)
Purchase of loan participations			(4,273)	(673)
Collection of loan participations			122	3,219
Loan originations and principal collections, net			(63,695)	(15,788)
Proceeds from sale of other real estate owned			72	592
Proceeds from sale of repossessed assets			30	40
Recoveries on loans charged off			219	218
Proceeds from sale and purchases of premises and equipment, net			(1,632)	(893)
Net cash used in investing activities			(99,328)	(4,238)
Cash Flows from Financing Activities
Net change in time deposits			(25,020)	22,787
Net change in other deposits			118,849	(6,702)
Common stock repurchased				(18,525)
Cash dividends paid			(4,348)	(4,359)
Net cash provided by (used in) financing activities			89,481	(6,799)
Net change in cash and due from banks			303	1,324
Cash and due from banks at beginning of period			10,290	12,882	12,882
Cash and due from banks at end of period	$ 10,593	$ 14,206	10,593	14,206	$ 10,290
Supplemental Disclosures of Cash Flow Information
Interest paid on deposits			4,872	5,528
Income taxes paid			2,785	1,756
Supplemental Disclosure of Noncash Activities
Loans charged against the allowance for loan losses			639	696
Loans transferred to repossessed assets			4	15
Unrealized gain on securities available for sale			14,794	10,056
Increase in operating lease right-of-use asset during the period			23	1,837
Increase in operating lease liability during the period			$ 23	$ 1,837