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Amount of liability recognized arising from contingent consideration in a business combination.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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Fair value of financial instruments - Assets, Liabilities and Temporary Equity Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Assets
Investments in equity securities	$ 62,256	$ 44,077
Fair Value, Measurements, Recurring
Assets
Investments in equity securities	62,256
Liabilities
Contingent earn-out obligations	28,342
Temporary equity
Noncontrolling interests subject to put provisions	1,426,211
Fair Value, Measurements, Recurring \| Interest rate cap agreements
Assets
Interest rate cap agreements	6,432
Fair Value, Measurements, Recurring \| Quoted prices in active markets for identical assets (Level 1)
Assets
Investments in equity securities	62,256
Liabilities
Contingent earn-out obligations	0
Temporary equity
Noncontrolling interests subject to put provisions	0
Fair Value, Measurements, Recurring \| Quoted prices in active markets for identical assets (Level 1) \| Interest rate cap agreements
Assets
Interest rate cap agreements	0
Fair Value, Measurements, Recurring \| Significant other observable inputs (Level 2)
Assets
Investments in equity securities	0
Liabilities
Contingent earn-out obligations	0
Temporary equity
Noncontrolling interests subject to put provisions	0
Fair Value, Measurements, Recurring \| Significant other observable inputs (Level 2) \| Interest rate cap agreements
Assets
Interest rate cap agreements	6,432
Fair Value, Measurements, Recurring \| Significant unobservable inputs (Level 3)
Assets
Investments in equity securities	0
Liabilities
Contingent earn-out obligations	28,342
Temporary equity
Noncontrolling interests subject to put provisions	1,426,211
Fair Value, Measurements, Recurring \| Significant unobservable inputs (Level 3) \| Interest rate cap agreements
Assets
Interest rate cap agreements	$ 0