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		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Net sales	$ 634.6	$ 525.3	$ 1,263.6	$ 1,034.3
Component Products
Disaggregation Of Revenue [Line Items]
Net sales	41.6	36.3	83.7	72.2
Component Products | Security Products
Disaggregation Of Revenue [Line Items]
Net sales	28.8	27.6	58.4	53.5
Component Products | Marine Components
Disaggregation Of Revenue [Line Items]
Net sales	12.8	8.7	25.3	18.7
Real Estate Management And Development
Disaggregation Of Revenue [Line Items]
Net sales	27.7	10.4	51.7	18.5
Real Estate Management And Development | Land Sales
Disaggregation Of Revenue [Line Items]
Net sales	25.9	8.5	48.1	15.1
Real Estate Management And Development | Water Delivery
Disaggregation Of Revenue [Line Items]
Net sales	1.4	1.5	2.9	2.5
Real Estate Management And Development | Utility and Other
Disaggregation Of Revenue [Line Items]
Net sales	$ 0.4	$ 0.4	$ 0.7	$ 0.9