Inventories (Tables)

12 Months Ended

Dec. 31, 2015

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consisted of the following (in thousands):

	As of December 31,
		2015		2014
Raw materials		$	335,439	$	209,251
Work in progress			7,512		7,972
Total		$	342,951	$	217,223