CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE LOSS	TREASURY STOCK	NON-CONTROLLING INTEREST
Beginning balance (in shares) at Dec. 31, 2018		7,517,547
Beginning balance at Dec. 31, 2018	$ 143,544	$ 41,763	$ 50,737	$ 69,787	$ (6,636)	$ (12,115)	$ 8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,195			8,189			6
Other comprehensive income	3,853				3,853
Stock-based compensation	313		313
Dividends declared	(4,411)			(4,411)
Common shares issued for employee stock purchase plan (in shares)		1,800
Common shares issued for employee stock purchase plan	47	$ 10	37
Ending balance (in shares) at Jun. 30, 2019		7,519,347
Ending balance at Jun. 30, 2019	151,541	$ 41,773	51,087	73,565	(2,783)	(12,115)	14
Beginning balance (in shares) at Mar. 31, 2019		7,518,410
Beginning balance at Mar. 31, 2019	147,036	$ 41,767	50,890	71,526	(5,042)	(12,115)	10
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,249			4,245			4
Other comprehensive income	2,259				2,259
Stock-based compensation	177		177
Dividends declared	(2,206)			(2,206)
Common shares issued for employee stock purchase plan (in shares)		937
Common shares issued for employee stock purchase plan	26	$ 6	20
Ending balance (in shares) at Jun. 30, 2019		7,519,347
Ending balance at Jun. 30, 2019	151,541	$ 41,773	51,087	73,565	(2,783)	(12,115)	14
Beginning balance (in shares) at Dec. 31, 2019		7,520,740
Beginning balance at Dec. 31, 2019	154,982	$ 41,782	51,487	76,583	(2,777)	(12,115)	22
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,841			6,833			8
Other comprehensive income	1,812				1,812
Stock-based compensation	436		436
Dividends declared	(4,506)			(4,506)
Common shares issued for employee stock purchase plan (in shares)		1,833
Common shares issued for employee stock purchase plan	43	$ 10	33
Ending balance (in shares) at Jun. 30, 2020		7,522,573
Ending balance at Jun. 30, 2020	159,608	$ 41,792	51,956	78,910	(965)	(12,115)	30
Beginning balance (in shares) at Mar. 31, 2020		7,521,491
Beginning balance at Mar. 31, 2020	156,588	$ 41,786	51,701	77,403	(2,213)	(12,115)	26
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,764			3,760			4
Other comprehensive income	1,248				1,248
Stock-based compensation	238		238
Dividends declared	(2,253)			(2,253)
Common shares issued for employee stock purchase plan (in shares)		1,082
Common shares issued for employee stock purchase plan	23	$ 6	17
Ending balance (in shares) at Jun. 30, 2020		7,522,573
Ending balance at Jun. 30, 2020	$ 159,608	$ 41,792	$ 51,956	$ 78,910	$ (965)	$ (12,115)	$ 30