Commitments and Contingencies - Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Lease cancellation notice period	30 days
Commitment maturing in the next fiscal year	$ 94,500
Other commitment, due in second year	101,700
Other commitment, due in third year	$ 41,800
Lease term expiration date	Mar. 31, 2023
Lease expense	$ 3,580
Lease expense		$ 2,100	$ 1,800