CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	RETAINED EARNINGS	RETAINED EARNINGS Adoption Impact	ACCUMULATED OTHER COMPREHENSIVE LOSS	TREASURY STOCK	NON-CONTROLLING INTEREST
Beginning balance (in shares) at Dec. 31, 2020		7,532,576
Beginning balance at Dec. 31, 2020	$ 164,146	$ 41,847	$ 52,523	$ 82,769		$ (882)	$ (12,115)	$ 4
Increase (Decrease) in Shareholders' Equity
Net income	16,048			16,033				15
Other comprehensive income (loss)	(230)					(230)
Stock-based compensation recognized in earnings	960		960
Dividends declared	(9,041)			(9,041)
Common shares issued for employee stock purchase plan (in shares)		3,850
Common shares issued for employee stock purchase plan	87	$ 21	66
Common shares issued for director compensation plan (in shares)		13,846
Common shares issued for director compensation plan	321	$ 77	244
Distributions to noncontrolling interest	(17)							(17)
Noncontrolling interest purchase	0		2					(2)
Ending balance (in shares) at Dec. 31, 2021		7,550,272
Ending balance at Dec. 31, 2021	172,274	$ 41,945	53,795	89,761		(1,112)	(12,115)	0
Increase (Decrease) in Shareholders' Equity
Net income	17,422			17,422
Other comprehensive income (loss)	(12,846)					(12,846)
Stock-based compensation recognized in earnings	1,231		1,231
Dividends declared	(9,036)			(9,036)
Common shares issued for employee stock purchase plan (in shares)		3,617
Common shares issued for employee stock purchase plan	82	$ 20	62
Common shares issued for director compensation plan (in shares)		12,921
Common shares issued for director compensation plan	312	$ 74	238
Cash settlement of options	(1,074)		(1,074)
Purchase of treasury stock	(700)						(700)
Ending balance (in shares) at Dec. 31, 2022		7,566,810
Ending balance at Dec. 31, 2022	$ 167,665	$ 42,039	54,252	98,147	$ 1,647	(13,958)	(12,815)	0
Increase (Decrease) in Shareholders' Equity
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-13 [Member]
Net income	$ 16,608			16,608
Other comprehensive income (loss)	4,808					4,808
Stock-based compensation recognized in earnings	951		951
Dividends declared	(9,164)			(9,164)
Common shares issued for employee stock purchase plan (in shares)		3,894
Common shares issued for employee stock purchase plan	89	$ 22	67
Common shares issued for director compensation plan (in shares)		10,517
Common shares issued for director compensation plan	255	$ 58	197
Common shares issued for registered at-the-market offering, net proceeds (in shares)		420,069
Common shares issued for registered at-the-market offering, net proceeds	8,291	$ 2,331	5,960
Dividend reinvestment plan (in shares)		17,929
Dividend reinvestment plan	406	$ 100	306
Ending balance (in shares) at Dec. 31, 2023		8,019,219
Ending balance at Dec. 31, 2023	$ 191,556	$ 44,550	$ 61,733	$ 107,238		$ (9,150)	$ (12,815)	$ 0