Revenue from Contract with Customer (Details) - ASC 606	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Wood construction products
Disaggregation of Revenue [Line Items]
Percentage of net sales	84.00%	85.00%
Concrete construction products
Disaggregation of Revenue [Line Items]
Percentage of net sales	16.00%	15.00%
Other
Disaggregation of Revenue [Line Items]
Percentage of net sales	1.00%