Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Components of Inventory

Inventories, net consisted of the following:

	December 31,
	2017			2016
	(Amounts in thousands)
Raw materials	$	358,827		$	348,012
Work in process	548,250			629,766
Finished goods	215,849			206,086
Less: Progress billings	(160,044		)	(216,783		)
Less: Excess and obsolete reserve	(78,609		)	(69,391		)
Inventories, net	$	884,273		$	897,690