Segment Reporting - Schedule of Reconciliation of Segment Earnings to Earnings Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]
Operating earnings	$ 3,925	$ 2,993	$ 3,075	$ 14,101
General and administrative	(4,162)	(4,630)	(10,649)	(12,860)
Interest and other income	119	338	893	665
Interest expense	(1,027)	(119)	(2,525)	(369)
Earnings before income taxes	3,017	3,212	1,443	14,397
Operating segments
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]
Operating earnings	8,087	7,623	13,724	26,961
General and administrative
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]
Operating earnings	0	0	0	0
General and administrative	(4,162)	(4,630)	(10,649)	(12,860)
Segment reconciling items
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract]
Interest and other income	119	338	893	665
Interest expense	$ (1,027)	$ (119)	$ (2,525)	$ (369)