Inventories (Tables)

3 Months Ended

Mar. 31, 2015

Inventory Disclosure [Abstract]

Inventories

Inventories in the accompanying Condensed Consolidated Balance Sheets consisted of the following amounts (in thousands):

	March 31, 2015		December 31, 2014
Raw materials and construction materials	$	24,603	$	23,330
Work in process	21,743		23,524
	$	46,346	$	46,854