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Fair value of financial instruments - Assets, Liabilities and Temporary Equity Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring
$ in Thousands
Jun. 30, 2025
USD ($)
Assets  
Investments in equity securities $ 37,953
Liabilities  
Contingent earn-out obligations 9,393
Temporary equity  
Noncontrolling interests subject to put provisions 1,660,990
Interest rate cap agreements  
Assets  
Interest rate cap agreements 17,187
Quoted prices in active markets for identical assets (Level 1)  
Assets  
Investments in equity securities 37,953
Liabilities  
Contingent earn-out obligations
Temporary equity  
Noncontrolling interests subject to put provisions
Quoted prices in active markets for identical assets (Level 1) | Interest rate cap agreements  
Assets  
Interest rate cap agreements
Significant other observable inputs (Level 2)  
Assets  
Investments in equity securities
Liabilities  
Contingent earn-out obligations
Temporary equity  
Noncontrolling interests subject to put provisions
Significant other observable inputs (Level 2) | Interest rate cap agreements  
Assets  
Interest rate cap agreements 17,187
Significant unobservable inputs (Level 3)  
Assets  
Investments in equity securities
Liabilities  
Contingent earn-out obligations 9,393
Temporary equity  
Noncontrolling interests subject to put provisions 1,660,990
Significant unobservable inputs (Level 3) | Interest rate cap agreements  
Assets  
Interest rate cap agreements