Leases - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) Lease	Jun. 30, 2020 USD ($)
Lessee Lease Description [Line Items]
Finance lease	$ 0		$ 0
Number of Lease Termination | Lease			2
Gain (Loss) on Termination of Lease			$ 1,670,000
General and Administrative [Member]
Lessee Lease Description [Line Items]
Lease costs, net	15,300,000	$ 15,500,000	30,900,000	$ 31,500,000
Gain (Loss) on Termination of Lease	$ 1,700,000		$ 1,700,000