Disaggregation of Sales - Schedule of Disaggregates of Net Sales of our Component Products and Real Estate Management and Development Segments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Net sales	$ 2,296.4	$ 1,849.7	$ 1,897.5
Component Products
Disaggregation Of Revenue [Line Items]
Net sales	140.8	114.5	124.2
Real Estate Management And Development
Disaggregation Of Revenue [Line Items]
Net sales	216.2	96.4	42.1
Real Estate Management And Development | Land Sales
Disaggregation Of Revenue [Line Items]
Net sales	207.8	87.0	33.5
Real Estate Management And Development | Water Delivery
Disaggregation Of Revenue [Line Items]
Net sales	6.8	7.6	6.8
Real Estate Management And Development | Utility and Other
Disaggregation Of Revenue [Line Items]
Net sales	1.6	1.8	1.8
Security Products | Component Products
Disaggregation Of Revenue [Line Items]
Net sales	105.1	87.9	99.3
Marine Components | Component Products
Disaggregation Of Revenue [Line Items]
Net sales	$ 35.7	$ 26.6	$ 24.9