Leasing Arrangements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating and capital lease agreements lease expiring year			2027
Rent expense	$ 3.4	$ 3.7	$ 11.0	$ 11.2
Lease termination expense	$ (1.2)