Condensed Combined Statements of Income (Unaudited) for LLCs/LPs Accounted Under Equity Method (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Schedule Of Equity Method Investments [Line Items]
Revenues	$ 23,806		$ 22,171		$ 47,032	$ 44,346
Net income					7,935	10,623
Our share of net income	$ 268		$ 345		639	597
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule Of Equity Method Investments [Line Items]
Revenues		$ 2,043		$ 2,049	4,269	3,979
Operating expenses		812		737	1,717	1,463
Depreciation and amortization		461		463	916	923
Interest, net		198		269	439	531
Net income		572		580	1,197	1,062
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule Of Equity Method Investments [Line Items]
Our share of net income		$ 268		$ 345	$ 639	$ 597