Leases - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure of Leases [Line Items]
Payment of lease payments	$ 3.6	$ 3.5
Minimum
Disclosure of Leases [Line Items]
Operating lease remaining lease term	1 year
Maximum
Disclosure of Leases [Line Items]
Operating lease remaining lease term	25 years