Inventory (Tables)

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Inventory [Table Text Block]

(in thousands)		Mar 31, 2017		Dec 31, 2016
Inventory, net:
	Remotely operated vehicle parts and components	$	119,907	$	118,236
	Other inventory, primarily raw materials	177,738		161,894
	Total	$	297,645	$	280,130