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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule Of Equity Method Investments [Line Items]
Revenues	$ 24,734	$ 23,806	$ 49,875	$ 47,032
Net income			10,576	7,935
Our share of net income	272	268	656	639
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule Of Equity Method Investments [Line Items]
Revenues	2,057	2,043	4,307	4,269
Operating expenses	826	812	1,724	1,717
Depreciation and amortization	472	461	946	916
Interest, net	142	198	301	439
Net income	617	572	1,336	1,197
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule Of Equity Method Investments [Line Items]
Our share of net income	$ 272	$ 268	$ 656	$ 639