Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Beginning balance, value at Dec. 31, 2018	$ 997	$ 58,004	$ 306,307	$ (701)	$ 364,607	$ 18,648	$ 383,255
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2018	9,969,174
Exercise of stock options	$ 2	456	0	0	458	0	458
Exercise of stock options, shares	15,034
Stock option grant compensation	$ 0	112	0	0	112	0	112
Shares granted to Employee	$ 0	50	0	0	50	0	50
Shares granted to Employee	1,012
Shares granted to Directors	$ 0	70	0	0	70	0	70
Shares granted to Directors	1,460
Shares purchased and cancelled	$ (17)	(987)	(7,206)	0	(8,210)	0	(8,210)
Stock Repurchased During Period, Shares	(169,251)
Net income	$ 0	0	16,177	0	16,177	(499)	15,678
Distributions to partners	0	0	0	0	0	(1,392)	(1,392)
Minimum pension liability, net							0
Unrealized loss on investment, net	0	0	0	1,624	1,624	0	1,624
Ending balance, value at Dec. 31, 2019	$ 982	57,705	315,278	923	374,888	16,757	391,645
Common Stock, Shares, Outstanding, Ending Balance at Dec. 31, 2019	9,817,429
Exercise of stock options	$ 1	238	0	0	239	0	239
Exercise of stock options, shares	12,415
Stock option grant compensation	$ 0	92	0	0	92	0	92
Restricted stock compensation	0	250	0	0	250	0	250
Shares granted to Employee	$ 1	529	0	0	530	0	530
Shares granted to Employee	11,448
Shares granted to Directors	$ 1	499	0	0	500	0	500
Shares granted to Directors	12,050
Restricted stock award	$ 2	(2)	0	0	0	0	0
Shares purchased and cancelled	$ (51)	(3,032)	(18,229)	0	(21,312)	0	(21,312)
Stock Repurchased During Period, Shares	(510,145)
Net income	$ 0	0	12,715	0	12,715	(993)	11,722
Distributions to partners	0	0	0	0	0	(765)	(765)
Minimum pension liability, net	0	0	0	143	143	0	143
Unrealized loss on investment, net	$ 0	0	0	(391)	(391)	0	(391)
Restricted stock award, shares	20,520
Ending balance, value at Dec. 31, 2020	$ 936	56,279	309,764	675	367,654	14,999	$ 382,653
Common Stock, Shares, Outstanding, Ending Balance at Dec. 31, 2020	9,363,717						9,363,717
Exercise of stock options	$ 2	267	0	0	269	0	$ 269
Exercise of stock options, shares	15,334
Stock option grant compensation	$ 0	69	0	0	69	0	69
Restricted stock compensation	0	492	0	0	492	0	492
Shares granted to Employee	$ 0	50	0	0	50	0	50
Shares granted to Employee	1,098
Shares granted to Directors	$ 1	499	0	0	500	0	500
Shares granted to Directors	9,105
Restricted stock award	$ 3	(3)	0	0	0	0	0
Shares purchased and cancelled	$ (1)	(36)	(227)	0	(264)	0	(264)
Stock Repurchased During Period, Shares	(6,004)
Contributions from partners	$ 0	0	0	0	0	4,551	4,551
Net income	0	0	28,215	0	28,215	11,879	40,094
Distributions to partners	0	0	0	0	0	(2,602)	(2,602)
Minimum pension liability, net	0	0	0	(38)	(38)	0	(38)
Unrealized loss on investment, net	$ 0	0	0	(524)	(524)	0	(524)
Restricted stock award, shares	27,778
Ending balance, value at Dec. 31, 2021	$ 941	$ 57,617	$ 337,752	$ 113	$ 396,423	$ 28,827	$ 425,250
Common Stock, Shares, Outstanding, Ending Balance at Dec. 31, 2021	9,411,028						9,411,028