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Leases - Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Assets    
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:OtherAssets us-gaap:OtherAssets
Operating $ 1,000,729 $ 1,020,352
Financing 114,503 117,805
Total leased assets $ 1,115,232 $ 1,138,157
Current:    
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Other current liabilities Other current liabilities
Operating $ 206,772 $ 208,526
Financing $ 35,896 $ 39,298
Non-current:    
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other liabilities Other liabilities
Operating $ 1,090,740 $ 1,116,795
Financing 78,473 78,881
Total lease liabilities $ 1,411,881 $ 1,443,500