Segment Information (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net sales and long-lived assets by geographical area
Net sales	$ 309,932	$ 284,178	$ 874,029	$ 836,964
Wood construction products
Net sales and long-lived assets by geographical area
Net sales	255,869	238,230	731,898	710,880
Concrete construction products
Net sales and long-lived assets by geographical area
Net sales	53,947	45,832	141,883	125,847
Other
Net sales and long-lived assets by geographical area
Net sales	116	116	248	237
North America
Net sales and long-lived assets by geographical area
Net sales	$ 265,505	$ 239,898	$ 746,009	$ 705,932