CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Total Shareholders' Equity	Common Stock	Additional Paid-in Capital	Retained Earnings	Noncontrolling Interest
Balance at beginning at Dec. 31, 2023	$ 846,954	$ 826,007	$ 86	$ 260,990	$ 564,931	$ 20,947
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,363	5,754			5,754	609
Repurchase of treasury shares by IOR	(802)					(802)
Adjustment to noncontrolling interest	0	409		409		(409)
Balance at ending at Sep. 30, 2024	852,515	832,170	86	261,399	570,685	20,345
Balance at beginning at Jun. 30, 2024	850,820	830,353	86	261,289	568,978	20,467
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,910	1,707			1,707	203
Repurchase of treasury shares by IOR	(215)					(215)
Adjustment to noncontrolling interest	0	110		110		(110)
Balance at ending at Sep. 30, 2024	852,515	832,170	86	261,399	570,685	20,345
Balance at beginning at Dec. 31, 2024	852,811	832,278	86	261,399	570,793	20,533
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,989	5,511			5,511	478
Purchase of IOR shares	(1,037)					(1,037)
Adjustment to noncontrolling interest	0	608		608		(608)
Balance at ending at Sep. 30, 2025	857,763	838,397	86	262,007	576,304	19,366
Balance at beginning at Jun. 30, 2025	856,891	837,310	86	261,644	575,580	19,581
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	884	724			724	160
Purchase of IOR shares	(12)					(12)
Adjustment to noncontrolling interest	0	363		363		(363)
Balance at ending at Sep. 30, 2025	$ 857,763	$ 838,397	$ 86	$ 262,007	$ 576,304	$ 19,366