Leases (Lessee) - Summary of Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 6,080	$ 5,937
Operating cash flows from finance leases	125	114
Financing cash flows from finance leases		10
Non-cash activities - Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 13,832	$ 1,818