Segment Information (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net sales and long-lived assets by geographical area
Net sales	$ 326,076	$ 304,853	$ 609,744	$ 564,097
Wood construction products
Net sales and long-lived assets by geographical area
Net sales	280,724	258,416	523,244	476,029
Concrete construction products
Net sales and long-lived assets by geographical area
Net sales	45,304	46,360	86,316	87,936
Other
Net sales and long-lived assets by geographical area
Net sales	48	77	184	132
North America
Net sales and long-lived assets by geographical area
Net sales	$ 286,807	$ 259,073	$ 535,857	$ 480,504