Leases - Schedule of Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash used in operating activities:
Operating leases	$ 3,712	$ 3,712
Financing leases	244	312
Cash used in financing activities:
Financing leases	2,056	1,346
ROU assets obtained in exchange for lease obligations:
Operating leases	2,881	8,909
Financing leases	$ 472	$ 72