Revenue - Schedule of Disaggregation of Revenue by Product Classification (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Net Sales	$ 272.7	$ 214.7
ASC Topic 606 [Member]
Disaggregation Of Revenue [Line Items]
Net Sales	272.7	214.7
ASC Topic 606 [Member] | Millwork Products [Member]
Disaggregation Of Revenue [Line Items]
Net Sales	125.4	96.2
ASC Topic 606 [Member] | Building Products [Member]
Disaggregation Of Revenue [Line Items]
Net Sales	125.8	101.9
ASC Topic 606 [Member] | Wood Products [Member]
Disaggregation Of Revenue [Line Items]
Net Sales	$ 21.5	$ 16.6