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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU 2016-01	$ 0			$ 537	$ (537)
Beginning balance (in shares) at Dec. 31, 2017		5,009,339
Beginning balance at Dec. 31, 2017	138,194	$ 41,744	$ 50,173	63,364	(4,974)	$ (12,115)	$ 2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,208			3,209			(1)
Other comprehensive income (loss)	(1,115)				(1,115)
Stock-based compensation	7		7
Dividends declared ($0.47 per share)	(2,204)			(2,204)
Common shares issued for employee stock purchase plan (in shares)		559
Common shares issued for employee stock purchase plan	23	$ 4	19
Ending balance (in shares) at Mar. 31, 2018		5,009,898
Ending balance at Mar. 31, 2018	138,113	$ 41,748	50,199	64,906	(6,626)	(12,115)	1
Beginning balance (in shares) at Dec. 31, 2018		5,011,698
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	3,946			3,944			2
Other comprehensive income (loss)	1,594				1,594
Stock-based compensation	136		136
Dividends declared ($0.47 per share)	(2,205)			(2,205)
Common shares issued for employee stock purchase plan (in shares)		575
Common shares issued for employee stock purchase plan	21	$ 4	17
Ending balance (in shares) at Mar. 31, 2019		5,012,273
Ending balance at Mar. 31, 2019	$ 147,036	$ 41,767	$ 50,890	$ 71,526	$ (5,042)	$ (12,115)	$ 10