Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	AOCI Attributable to Parent [Member]	Total
Balance at beginning of period at Dec. 31, 2020							$ 21,987	$ 93,034	$ 257,935	$ 0	$ 7,165	$ 380,121
Cash dividends declared							0	0	(14,910)	0	0	(14,910)
Issuance of shares of common stock pursuant to dividend reinvestment plan							373	10,815	0	0	0	11,188
Issuance of shares of common stock pursuant to exercise of stock options							29	544	0	0	0	573
Share based compensation expense							0	362	0	0	0	362
Net change in fair value of available-for-sale securities during the period, net of taxes							0	0	0	0	(8,530)	(8,530)
Net earnings							0	0	35,625	0	0	35,625
Balance at end of period at Sep. 30, 2021							22,389	104,755	278,650	0	(1,365)	404,429
Balance at beginning of period at Jun. 30, 2021							22,170	98,321	273,622	0	1,492	395,605
Cash dividends declared							0	0	(8,314)	0	0	(8,314)
Issuance of shares of common stock pursuant to dividend reinvestment plan							206	6,080	0	0	0	6,286
Issuance of shares of common stock pursuant to exercise of stock options							13	239	0	0	0	252
Share based compensation expense							0	115	0	0	0	115
Net change in fair value of available-for-sale securities during the period, net of taxes							0	0	0	0	(2,857)	(2,857)
Net earnings							0	0	13,342	0	0	13,342
Balance at end of period at Sep. 30, 2021							22,389	104,755	278,650	0	(1,365)	404,429
Balance at beginning of period at Dec. 31, 2021	$ 0	$ 0	$ 1,011	$ 0	$ 0	$ 1,011	22,403	105,177	292,452	0	(6,315)	413,717
Cash dividends declared							0	0	(20,878)	0	0	(20,878)
Issuance of shares of common stock pursuant to dividend reinvestment plan							501	15,616	0	0	0	16,117
Issuance of shares of common stock pursuant to exercise of stock options							17	147	0	0	0	164
Share based compensation expense							0	586	0	0	0	586
Net change in fair value of available-for-sale securities during the period, net of taxes							0	0	0	0	(108,888)	(108,888)
Net earnings							0	0	40,702	(5)	0	40,697
Balance at end of period at Sep. 30, 2022							22,921	121,526	313,287	32	(115,203)	342,563
Noncontrolling interest contribution							0	0	0	37	0	37
Balance at beginning of period at Jun. 30, 2022							22,717	114,943	306,615	39	(80,865)	363,449
Cash dividends declared							0	0	(8,518)	0	0	(8,518)
Issuance of shares of common stock pursuant to dividend reinvestment plan							199	6,305	0	0	0	6,504
Issuance of shares of common stock pursuant to exercise of stock options							5	63	0	0	0	68
Share based compensation expense							0	215	0	0	0	215
Net change in fair value of available-for-sale securities during the period, net of taxes							0	0	0	0	(34,338)	(34,338)
Net earnings							0	0	15,190	(7)	0	15,183
Balance at end of period at Sep. 30, 2022							$ 22,921	$ 121,526	$ 313,287	$ 32	$ (115,203)	$ 342,563