Combined Statements of Income for LLCs/LPs Accounted Under Equity Method (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Equity Method Investments [Line Items]
Revenues	$ 95,575	$ 90,625	$ 84,190
Net income	15,400	21,102	109,166
Our share of net income	1,207	1,191	1,796
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule Of Equity Method Investments [Line Items]
Our share of net income	1,207	1,191	1,796
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule Of Equity Method Investments [Line Items]
Revenues	8,505	8,204	10,575
Operating expenses	3,351	3,177	4,093
Depreciation and amortization	1,873	1,853	2,198
Interest, net	825	1,061	1,721
Net income	$ 2,456	$ 2,113	$ 2,563