Revenue from Contract with Customer (Details) - ASC 606	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Wood construction products
Disaggregation of Revenue [Line Items]
Percentage of net sales		86.00%	84.00%
Concrete construction products
Disaggregation of Revenue [Line Items]
Percentage of net sales		14.00%	16.00%
Other
Disaggregation of Revenue [Line Items]
Percentage of net sales	1.00%