Condensed Combined Statement of Income for LLCs/LPs Accounted Under Equity Method (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Schedule Of Equity Method Investments [Line Items]
Revenues	$ 22,151	$ 21,205	$ 66,497	$ 62,780
Net income			15,471	17,551
Our share of net income	346	303	943	1,341
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule Of Equity Method Investments [Line Items]
Revenues	2,129	2,736	6,108	8,373
Operating expenses	826	1,184	2,289	3,356
Depreciation and amortization	463	627	1,386	1,684
Interest, net	264	388	795	1,260
Net income	576	537	1,638	2,073
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule Of Equity Method Investments [Line Items]
Our share of net income	$ 346	$ 303	$ 943	$ 1,341