CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Total Share holders’ Equity	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accum. Other Comp- rehensive Income (loss), net	Non- Controlling Interests
Beginning balance (in shares) at Dec. 31, 2023			18,968,448
Beginning balance at Dec. 31, 2023	$ 447,976	$ 414,520	$ 1,897	$ 66,706	$ 345,882	$ 35	$ 33,456
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options	0
Stock option grant compensation	39	39		39
Restricted stock compensation	641	641		641
Shares granted to Directors (in shares)			19,356
Shares granted to Directors	600	600	$ 2	598
Restricted stock award (shares)			42,670
Restricted stock award	0		$ 4	(4)
Net income (loss)	3,394	3,345			3,345		49
Distributions to partners	(1,489)						(1,489)
Minimum pension liability,net	(15)	(15)				(15)
Unrealized gains on investment, net	2	2				2
Ending balance (in shares) at Jun. 30, 2024			19,030,474
Ending balance at Jun. 30, 2024	451,148	419,132	$ 1,903	67,980	349,227	22	32,016
Beginning balance (in shares) at Mar. 31, 2024			19,000,600
Beginning balance at Mar. 31, 2024	448,871	416,133	$ 1,900	67,023	347,183	27	32,738
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option grant compensation	20	20		20
Restricted stock compensation	340	340		340
Shares granted to Directors (in shares)			19,356
Shares granted to Directors	600	600	$ 2	598
Net income (loss)	2,059	2,044			2,044		15
Distributions to partners	(737)						(737)
Minimum pension liability,net	(7)	(7)				(7)
Unrealized gains on investment, net	2	2				2
Ending balance (in shares) at Jun. 30, 2024			19,030,474
Ending balance at Jun. 30, 2024	$ 451,148	419,132	$ 1,903	67,980	349,227	22	32,016
Beginning balance (in shares) at Dec. 31, 2024	19,046,894		19,046,894
Beginning balance at Dec. 31, 2024	$ 469,113	423,103	$ 1,905	68,876	352,267	55	46,010
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option grant compensation	77	77		77
Restricted stock compensation	649	649		649
Shares granted to Directors (in shares)			21,900
Shares granted to Directors	600	600	$ 2	598
Restricted stock award (shares)			40,440
Restricted stock award	0		$ 4	(4)
Net income (loss)	2,258	2,288			2,288		(30)
Contributions from partner	288						288
Distributions to partners	(11,556)						(11,556)
Minimum pension liability,net	(15)	(15)				(15)
Unrealized gains on investment, net	$ 0
Ending balance (in shares) at Jun. 30, 2025	19,109,234		19,109,234
Ending balance at Jun. 30, 2025	$ 461,414	426,702	$ 1,911	70,196	354,555	40	34,712
Beginning balance (in shares) at Mar. 31, 2025			19,087,334
Beginning balance at Mar. 31, 2025	460,496	425,170	$ 1,909	69,237	353,977	47	35,326
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option grant compensation	38	38		38
Restricted stock compensation	323	323		323
Shares granted to Directors (in shares)			21,900
Shares granted to Directors	600	600	$ 2	598
Restricted stock award (shares)			0
Restricted stock award	0		$ 0	0
Net income (loss)	624	578			578		46
Contributions from partner	160						160
Distributions to partners	(820)						(820)
Minimum pension liability,net	(7)	(7)				(7)
Unrealized gains on investment, net	$ 0
Ending balance (in shares) at Jun. 30, 2025	19,109,234		19,109,234
Ending balance at Jun. 30, 2025	$ 461,414	$ 426,702	$ 1,911	$ 70,196	$ 354,555	$ 40	$ 34,712