Revenue (Tables)

9 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Revenue from External Customers by Products and Services

evenue, disaggregated by business segment, geographical region, and timing of transfer of goods or services, as follows:

			Three Months Ended						Nine Months Ended
(in thousands)			Sep 30, 2019		Sep 30, 2018		Jun 30, 2019		Sep 30, 2019		Sep 30, 2018
Business Segment:
	Energy Services and Products
		Remotely Operated Vehicles	$	113,101	$	105,045	$	120,363	$	333,810	$	298,065
		Subsea Products	150,836		137,099		138,910		418,590		385,491
		Subsea Projects	75,996		104,972		75,104		240,828		239,868
		Asset Integrity	59,274		62,346		61,156		181,119		191,056
	Total Energy Services and Products		399,207		409,462		395,533		1,174,347		1,114,480
	Advanced Technologies		98,440		109,838		100,248		312,967		299,907
		Total	$	497,647	$	519,300	$	495,781	$	1,487,314	$	1,414,387

Revenue from External Customers by Geographic Areas

			Three Months Ended						Nine Months Ended
(in thousands)			Sep 30, 2019		Sep 30, 2018		Jun 30, 2019		Sep 30, 2019		Sep 30, 2018
Geographic Operating Areas:
	Foreign:
		Africa	$	73,901	$	51,669	$	61,390	$	222,397	$	168,722
		United Kingdom	61,914		56,769		65,058		180,270		153,087
		Norway	59,875		51,952		60,252		162,593		142,820
		Asia and Australia	42,662		39,764		43,123		127,211		122,158
		Brazil	25,404		14,554		23,658		66,825		46,844
		Other	14,178		45,898		28,334		63,734		80,348
	Total Foreign		277,934		260,606		281,815		823,030		713,979
	United States		219,713		258,694		213,966		664,284		700,408
Total			$	497,647	$	519,300	$	495,781	$	1,487,314	$	1,414,387

Revenue by Timing of Transfer of Goods or Services

Timing of Transfer of Goods or Services:
	Revenue recognized over time	$	460,029	$	485,393	$	455,937	$	1,377,211	$	1,297,095
	Revenue recognized at a point in time	37,618		33,907		39,844		110,103		117,292
Total		$	497,647	$	519,300	$	495,781	$	1,487,314	$	1,414,387