Operations by Business Segment and Geographic Area Operations by Business Segment and Geographic Areas - Schedule of Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 3,429,536	$ 3,504,940
Property, Plant and Equipment, Net	1,266,731	1,305,822
Goodwill	426,872	331,474
Oil And Gas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	2,808,016	2,849,404
Property, Plant and Equipment, Net	1,241,411	1,285,467
Goodwill	405,030	309,632
ROVs [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	951,001	1,148,680
Property, Plant and Equipment, Net	580,315	693,240
Goodwill	24,344	25,458
Subsea Products [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	890,041	904,935
Property, Plant and Equipment, Net	348,042	336,125
Goodwill	88,279	99,656
Subsea Projects [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	671,019	448,378
Property, Plant and Equipment, Net	277,695	214,478
Goodwill	149,389	19,712
Asset Integrity [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	295,955	347,411
Property, Plant and Equipment, Net	35,359	41,624
Goodwill	143,018	164,806
Advanced Technologies [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	97,764	86,203
Property, Plant and Equipment, Net	12,614	8,780
Goodwill	21,842	21,842
Corporate and Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	523,756	569,333
Property, Plant and Equipment, Net	$ 12,706	$ 11,575