Shareholders Equity - USD ($) $ in Thousands	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income, net of tax	Total Shareholders' Equity	Noncontrolling Interest	Total
Beginning balance, shares at Dec. 31, 2018	9,969,174
Beginning balance, amount at Dec. 31, 2018	$ 997	$ 58,004	$ 306,307	$ (701)	$ 364,607	$ 18,648	$ 383,255
Exercise of stock options, shares	4,804
Exercise of stock options, amount		145			145		145
Stock option compensation		57			57		57
Shares purchased and canceled, shares	(110,527)
Shares purchased and canceled, amount	$ (11)	(644)	(4,657)		(5,312)		(5,312)
Net income			11,723		11,723		11,723
Income (loss) attributable to noncontrolling interest						(268)	(268)
Distributions to partners						(510)	(510)
Unrealized gain on investments, net				1,911	1,911		1,911
Ending balance, shares at Jun. 30, 2019	9,863,451
Ending balance, amount at Jun. 30, 2019	$ 986	57,562	313,373	1,210	373,131	17,870	391,001
Beginning balance, shares at Dec. 31, 2019	9,817,429
Beginning balance, amount at Dec. 31, 2019	$ 982	57,705	315,278	923	374,888	16,757	$ 391,645
Exercise of stock options, shares							0
Stock option compensation		47			47		$ 47
Restricted stock compensation		94			94		94
Shares granted to employee, shares	11,448
Shares granted to employee, amount	$ 1	529			530		530
Shares granted to Directors, shares	12,050
Shares granted to Directors, amount	$ 1	499			500		500
Restricted stock award, shares	20,520
Restricted stock award, amount	$ 2	(2)
Shares purchased and canceled, shares	(298,303)
Shares purchased and canceled, amount	$ (30)	(1,765)	(10,559)		(12,354)		(12,354)
Net income			5,767		5,767		5,767
Income (loss) attributable to noncontrolling interest						(291)	(291)
Distributions to partners						(408)	(408)
Unrealized gain on investments, net				271	271		271
Ending balance, shares at Jun. 30, 2020	9,563,144
Ending balance, amount at Jun. 30, 2020	$ 956	$ 57,107	$ 310,486	$ 1,194	$ 369,743	$ 16,058	$ 385,801