Inventories (Tables)

12 Months Ended

Dec. 31, 2014

Inventory Disclosure [Abstract]

Inventories

Inventories as of December 31, 2014 and 2013 consist of the following amounts (in thousands):

	2014		2013
Raw materials and construction materials	$	23,330	$	32,795
Work in process	23,524		19,328
	$	46,854	$	52,123