Non-controlling Interest - Net income reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Minority Interest [Line Items]
Income (loss) before provision for income taxes attributable to Holdings	$ (2,446)	$ (168)
Income (loss) before provision for income taxes: NCI	(1,657)	(119)
Income (loss) before provision for income taxes	(4,103)	(287)
(Provision)/benefit for income taxes attributable to Holdings.	(907)	(503)
(Provision)/benefit for income taxes: NCI	(597)	111
(Provision)/benefit for income taxes	(1,504)	(392)
Net income (loss) attributable to Holdings.	(3,353)	(671)
Net income (loss): NCI	(2,254)	(8)
Net income (loss)	$ (5,607)	$ (679)
RMCO, LLC
Minority Interest [Line Items]
WAO percentage	100.00%		100.00%
RMCO, LLC | Weighted Average
Minority Interest [Line Items]
WAO percentage attributable to Holdings.	59.50%	58.80%
WAO percentage	100.00%	100.00%
RIHI | RMCO, LLC | Weighted Average
Minority Interest [Line Items]
WAO percentage: NCI	40.50%	41.20%