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		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Net sales	$ 556.3	$ 578.9	$ 1,819.9	$ 1,613.2
Component Products
Disaggregation Of Revenue [Line Items]
Net sales	42.9	34.5	126.6	106.7
Component Products | Security Products
Disaggregation Of Revenue [Line Items]
Net sales	28.5	25.8	86.9	79.3
Component Products | Marine Components
Disaggregation Of Revenue [Line Items]
Net sales	14.4	8.7	39.7	27.4
Real Estate Management And Development
Disaggregation Of Revenue [Line Items]
Net sales	53.8	44.6	105.5	63.1
Real Estate Management And Development | Land Sales
Disaggregation Of Revenue [Line Items]
Net sales	52.8	41.9	100.9	57.0
Real Estate Management And Development | Water Delivery
Disaggregation Of Revenue [Line Items]
Net sales	0.7	2.3	3.6	4.8
Real Estate Management And Development | Utility and Other
Disaggregation Of Revenue [Line Items]
Net sales	$ 0.3	$ 0.4	$ 1.0	$ 1.3