Leases - Schedule of Lease-related Assets and Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Right-of-use assets - operating	$ 23,462	$ 24,319
Right-of-use assets - finance	707	763
Total lease assets	24,169
Liabilities
Lease liability - operating	24,391	25,045
Lease liability - finance	3,367	$ 3,541
Total lease liabilities	$ 27,758