Revenue - Disaggregation of Sales - Schedule of Disaggregates of Net Sales of our Component Products and Real Estate Management and Development Segments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation Of Revenue [Line Items]
Net sales	$ 492.7	$ 629.0
Component Products
Disaggregation Of Revenue [Line Items]
Net sales	41.2	42.1
Component Products | Security Products
Disaggregation Of Revenue [Line Items]
Net sales	27.4	29.6
Component Products | Marine Components
Disaggregation Of Revenue [Line Items]
Net sales	13.8	12.5
Real Estate Management And Development
Disaggregation Of Revenue [Line Items]
Net sales	25.2	24.0
Real Estate Management And Development | Land Sales
Disaggregation Of Revenue [Line Items]
Net sales	24.9	22.2
Real Estate Management And Development | Water Delivery
Disaggregation Of Revenue [Line Items]
Net sales		1.5
Real Estate Management And Development | Utility and Other
Disaggregation Of Revenue [Line Items]
Net sales	$ 0.3	$ 0.3