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Leases - Supplemental Balance Sheet Information Related to Leases (Detail)
$ in Thousands
Jun. 30, 2019
USD ($)
Assets  
Operating lease assets $ 949,216
Financing lease assets $ 68,193
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:OtherAssetsNoncurrent
Total leased assets $ 1,017,409
Current:  
Operating 173,496
Financing $ 27,192
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesCurrent
Non-current:  
Operating $ 996,228
Financing $ 41,001
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent
Total lease liabilities $ 1,237,917