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Equity Method Investments - Summary of Combined Income Statement Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]      
Net income $ 279,196 $ 244,677 $ 227,305
Equity Method Investee      
Schedule of Equity Method Investments [Line Items]      
Revenues 3,980,066 3,716,548 5,685,015
Gross profit 142,709 133,170 172,673
Net income $ 139,988 $ 130,949 $ 162,095