Revenue (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Revenue from External Customers by Products and Services

			Three Months Ended
(in thousands)			Mar 31, 2020		Mar 31, 2019		Dec 31, 2019
Business Segment:
	Energy Services and Products
		Remotely Operated Vehicles	$	111,780	$	100,346	$	116,020
		Subsea Products	194,838		128,844		183,659
		Subsea Projects	61,455		89,728		86,728
		Asset Integrity	59,132		60,689		61,835
	Total Energy Services and Products		427,205		379,607		448,242
	Advanced Technologies		109,463		114,279		112,568
		Total	$	536,668	$	493,886	$	560,810

Revenue from External Customers by Geographic Areas

			Three Months Ended
(in thousands)			Mar 31, 2020		Mar 31, 2019		Dec 31, 2019
Geographic Operating Areas:
	Foreign:
		Africa	$	63,417	$	87,106	$	70,421
		United Kingdom	60,787		53,298		76,078
		Norway	52,184		42,466		55,169
		Asia and Australia	45,680		41,426		47,558
		Brazil	26,489		17,763		26,686
		Other	24,659		21,222		27,857
	Total Foreign		273,216		263,281		303,769
	United States		263,452		230,605		257,041
Total			$	536,668	$	493,886	$	560,810

Revenue by Timing of Transfer of Goods or Services

Timing of Transfer of Goods or Services:
	Revenue recognized over time	$	498,307	$	461,245	$	523,518
	Revenue recognized at a point in time	38,361		32,641		37,292
Total		$	536,668	$	493,886	$	560,810

Contract with Customer, Asset and Liability [Table Text Block]

The following table provides information about contract assets, and contract liabilities from contracts with customers:

(in thousands)	Mar 31, 2020		Dec 31, 2019
Contract assets	$	237,107	$	221,288
Contract liabilities	61,929		117,342