Leases - Schedule of Lease-related Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Right-of-use assets - operating	$ 17,953	$ 21,191
Right-of-use assets - finance	875	987
Total lease assets	18,828
Liabilities
Lease liability - operating	18,614	21,844
Lease liability - finance	3,879	$ 4,191
Total lease liabilities	$ 22,493