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Leases - Supplemental Cash Flow Information and Non-Cash Activity Related to Leases (Detail) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Leases [Abstract]    
Right-of-use assets obtained in exchange for new operating lease liabilities $ 175,909 $ 149,259
Right-of-use assets obtained in exchange for new financing lease liabilities 34,169 40,819
Other non-cash increases in operating lease right-of-use assets 6,729 35,510
Other non-cash decreases in financing lease right-of-use assets $ (471) $ (1,011)