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Curtailment of Manufacturing Facilities (Details) - USD ($) $ in Millions					12 Months Ended
	Mar. 31, 2020	Feb. 20, 2020	Dec. 31, 2018	Nov. 02, 2018	Dec. 31, 2020	Dec. 31, 2018
Curtailment of I-joist Production at Roxboro, NC Facility [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Activities, Initiation Date		Feb. 20, 2020
Restructuring and Related Activities, Completion Date	Mar. 31, 2020
Accelerated depreciation					$ 15.0
Curtailment of I-joist Production at Roxboro, NC Facility [Member] \| Loss on curtailment of facility [Member]
Restructuring Cost and Reserve [Line Items]
Other closure related costs					$ 1.7
Curtailment of LVL Production at Roxboro, NC Facility [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Activities, Initiation Date				Nov. 02, 2018
Restructuring and Related Activities, Completion Date			Dec. 31, 2018
Accelerated depreciation						$ 55.0
Curtailment of LVL Production at Roxboro, NC Facility [Member] \| Loss on sale and curtailment of facilities [Member]
Restructuring Cost and Reserve [Line Items]
Other closure related costs						2.6
Severance-related expenses						$ 0.2