Leases - Schedule of Supplemental Information Related to Operating Leases (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Assets
Operating lease, right-of-use asset	$ 176,087
Operating lease, right-of-use asset [extensible list]	us-gaap:OtherAssets
Liabilities
Operating lease, liability	$ 193,055
Operating lease, liability [extensible list]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent