Property, Plant and Equipment - Schedule of Balances Held Under Other Finance Obligations (Detail) - Other Finance Obligations - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Assets held under other finance obligations	$ 255,733	$ 288,210
Less: accumulated amortization	16,612	21,786
Assets held under other finance obligations, net	239,121	266,424
Land
Property Plant And Equipment [Line Items]
Assets held under other finance obligations	118,683	118,677
Buildings and Improvements
Property Plant And Equipment [Line Items]
Assets held under other finance obligations	$ 137,050	142,345
Machinery and Equipment
Property Plant And Equipment [Line Items]
Assets held under other finance obligations		$ 27,188