Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net sales and long-lived assets by geographical area
Net sales	$ 195,596	$ 181,703	$ 350,130	$ 340,437
Wood Construction
Net sales and long-lived assets by geographical area
Net sales	165,869	154,810	298,666	292,589
Concrete Construction
Net sales and long-lived assets by geographical area
Net sales	29,421	26,488	50,856	47,230
Other
Net sales and long-lived assets by geographical area
Net sales	$ 306	$ 405	$ 608	$ 618