Leases - Schedule of Lease-related Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Right-of-use assets - operating	$ 24,319	$ 21,191
Right-of-use assets - finance	763	987
Total lease assets	25,082
Liabilities
Lease liability - operating	25,045	21,844
Lease liability - finance	3,541	$ 4,191
Total lease liabilities	$ 28,586