Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net sales and long-lived assets by geographical area
Net sales	$ 195,877	$ 172,113	$ 546,008	$ 512,550
Wood Construction
Net sales and long-lived assets by geographical area
Net sales	164,094	145,987	462,761	438,576
Concrete Construction
Net sales and long-lived assets by geographical area
Net sales	31,506	25,849	82,361	73,079
Other
Net sales and long-lived assets by geographical area
Net sales	$ 277	$ 277	$ 886	$ 895