Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 23.4	$ 21.2	$ 17.3
Payment for construction to expand building	$ 20.8	$ 2.2
Latham, New York
Property, Plant and Equipment [Line Items]
Payment for construction to expand building			2.1
Payment to acquire building			2.9
Yarmouth, Maine
Property, Plant and Equipment [Line Items]
Payment for construction to expand building			$ 19.4