Revenue (Tables)

6 Months Ended

Jun. 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						Six Months Ended
(in thousands)			Jun 30, 2019		Jun 30, 2018		Mar 31, 2019		Jun 30, 2019		Jun 30, 2018
Business Segment:
	Energy Services and Products
		Remotely Operated Vehicles	$	120,363	$	107,426	$	100,346	$	220,709	$	193,020
		Subsea Products	138,910		121,704		128,844		267,754		248,392
		Subsea Projects	75,104		78,036		89,728		164,832		134,896
		Asset Integrity	61,156		67,422		60,689		121,845		128,710
	Total Energy Services and Products		395,533		374,588		379,607		775,140		705,018
	Advanced Technologies		100,248		104,086		114,279		214,527		190,069
		Total	$	495,781	$	478,674	$	493,886	$	989,667	$	895,087

Revenue from External Customers by Geographic Areas

			Three Months Ended						Six Months Ended
(in thousands)			Jun 30, 2019		Jun 30, 2018		Mar 31, 2019		Jun 30, 2019		Jun 30, 2018
Geographic Operating Areas:
	Foreign:
		Africa	$	61,390	$	61,966	$	87,106	$	148,496	$	117,053
		United Kingdom	65,058		50,999		53,298		118,356		96,318
		Norway	60,252		51,827		42,466		102,718		90,869
		Asia and Australia	43,123		43,448		41,426		84,549		82,394
		Brazil	23,658		13,461		17,763		41,421		32,289
		Other	28,334		14,811		21,222		49,556		34,450
	Total Foreign		281,815		236,512		263,281		545,096		453,373
	United States		213,966		242,162		230,605		444,571		441,714
Total			$	495,781	$	478,674	$	493,886	$	989,667	$	895,087

Revenue by Timing of Transfer of Goods or Services

Timing of Transfer of Goods or Services:
	Revenue recognized over time	$	455,937	$	437,035	$	461,245	$	917,182	$	811,702
	Revenue recognized at a point in time	39,844		41,639		32,641		72,485		83,385
Total		$	495,781	$	478,674	$	493,886	$	989,667	$	895,087