CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Cash Flows From Operating Activities
Net income	$ 4,509	$ 3,178	$ 3,425	$ 2,679	$ 10,993	$ 8,809
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation					562	723
Accretion and amortization of investment securities premiums and discounts, net					3,039	1,341
Valuation adjustment on mortgage servicing rights					24	305
Increase in deferred loan origination fees and costs, net					49	4,254
(Reversal of) provision for loan losses	(1,800)		800		(1,500)	2,250	$ 3,050
Stock-based compensation					440	431
Losses (gains) on sales/calls of available-for-sale securities	20		(254)		221	(296)
Amortization of operating lease right-of-use asset					781	769
Gains on sales of loans held-for-sale	(305)		(834)		(1,351)	(1,584)
Proceeds from sales of loans held-for-sale					58,529	58,616
Originations of loans held-for-sale					(51,914)	(57,552)
Changes in assets and liabilities:
Decrease (increase) in interest receivable and other assets					1,019	(2,453)
Decrease in interest payable and other liabilities					(1,587)	(1,370)
Net cash provided by operating activities					19,305	14,243
Cash Flows From Investing Activities
Proceeds from calls or maturities of available-for-sale securities					15,190	33,330
Proceeds from sales of available-for-sale securities					21,917	14,201
Principal repayments on available-for-sale securities					68,753	47,991
Purchase of available-for-sale securities					(298,390)	(108,312)
Net decrease (increase) in certificates of deposit					3,412	(3,442)
Net decrease (increase) in loans					55,576	(203,478)
Net proceeds from (purchases) redemption of Federal Home Loan Bank stock and other equity securities, at cost					(617)	94
Purchases of premises and equipment					(803)	(842)
Net cash used in investing activities					(134,962)	(220,458)
Cash Flows From Financing Activities
Net increase in deposits					271,495	360,369
Proceeds from Federal Home Loan Bank advances					0	10,000
Principal payments on Federal Home Loan Bank advances					(5,000)	0
Cash dividends paid in lieu of fractional shares					(8)	(8)
Stock options exercised					0	4
Repurchases of common stock					(2,379)	0
Net cash provided by financing activities					264,108	370,365
Net increase in Cash and Cash Equivalents					148,451	164,150
Cash and Cash Equivalents, beginning of period		$ 267,177		$ 111,493	267,177	111,493	111,493
Cash and Cash Equivalents, end of period	$ 415,628		$ 275,643		415,628	275,643	$ 267,177
Cash paid during the period for:
Interest					679	1,222
Income taxes					3,270	3,350
Supplemental disclosures of non-cash investing and financing activities:
Stock dividend distributed					6,636	7,016
Unrealized holding (losses) gains on available for sale securities, net of taxes					(5,159)	6,219
Transfer of loans held-for-sale to loans held-for-investment					$ 1,765	$ 0