PARENT COMPANY FINANCIAL INFORMATION - CONDENSED STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 22,128	$ 20,974	$ 20,075
Adjustments for non-cash items -
NET CASH FLOWS PROVIDED BY OPERATING ACTIVITIES	25,242	17,821	13,678
Cash flows from investing activities:
Purchases of equity securities	19	16	369
Proceeds from sales of equity securities	0	0	967
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(44,912)	(175,219)	(80,051)
Cash flows from financing activities:
Net increase in short-term borrowings	71,455	0	0
Proceeds from long-term debt	15,000	0	0
Principal payments on long-term debt	(5,928)	(12,000)	(19,000)
Proceeds from issuance of common stock	408	434	401
Payments to repurchase common stock	(23,660)	(8,310)	(1,872)
Cash dividends paid on common stock	(9,191)	(9,720)	(9,448)
NET CASH FLOWS PROVIDED BY FINANCING ACTIVITIES	24,235	143,804	77,338
Net change in cash	4,565	(13,594)	10,965
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	18,136
CASH AND CASH EQUIVALENTS AT END OF YEAR	22,701	18,136
Parent Company
Cash flows from operating activities:
Net income	22,128	20,974	20,075
Adjustments for non-cash items -
Increase in undistributed income of subsidiaries	(6,966)	(6,396)	(8,751)
Other, net	636	299	(88)
NET CASH FLOWS PROVIDED BY OPERATING ACTIVITIES	15,798	14,877	11,236
Cash flows from investing activities:
Purchases of equity securities	0	0	346
Proceeds from sales of equity securities	0	0	463
NET CASH FLOWS USED IN INVESTING ACTIVITIES	0	0	117
Cash flows from financing activities:
Net increase in short-term borrowings	3,000	0	0
Proceeds from long-term debt	15,000	0	0
Principal payments on long-term debt	(928)	0	0
Proceeds from issuance of common stock	409	434	401
Payments to repurchase common stock	(23,660)	(8,310)	(1,872)
Cash dividends paid on common stock	(9,191)	(9,720)	(9,448)
Other	0	4	114
NET CASH FLOWS PROVIDED BY FINANCING ACTIVITIES	(15,370)	(17,592)	(10,805)
Net change in cash	428	(2,715)	548
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1,108	3,823	3,275
CASH AND CASH EQUIVALENTS AT END OF YEAR	$ 1,536	$ 1,108	$ 3,823