Segment Information (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net sales and long-lived assets by geographical area
Net sales	$ 263,002	$ 229,973	$ 482,869	$ 429,496
Wood construction products
Net sales and long-lived assets by geographical area
Net sales	224,013	196,734	414,890	368,512
Concrete construction products
Net sales and long-lived assets by geographical area
Net sales	38,917	33,239	67,734	60,983
Other
Net sales and long-lived assets by geographical area
Net sales	$ 72	$ 0	$ 245	$ 1