Selected Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2015

Equity Method Investment, Summarized Financial Information [Abstract]

Schedule of Other Assets and Other Liabilities [Table Text Block]

The following is information regarding selected balance sheet accounts:

		December 31,
(in thousands)		2016		2015
Inventory:
	Remotely operated vehicle parts and components	$	118,236	$	163,539
	Other inventory, primarily raw materials	161,894		164,914
	Total	$	280,130	$	328,453
Other Current Assets:
	Deferred income taxes	$	—	$	57,337
	Prepaid expenses	42,523		133,683
	Total	$	42,523	$	191,020
Other Non-Current Assets:
	Intangible assets, net	$	87,801	$	93,701
	Angola bonds	59,130		—
	Cash surrender value of life insurance policies	60,160		55,924
	Investment in unconsolidated affiliates	39,826		49,144
	Deferred income taxes	12,187		—
	Other	11,807		19,671
	Total	$	270,911	$	218,440
Accrued Liabilities:
	Payroll and related costs	$	141,485	$	161,228
	Accrued job costs	59,331		79,857
	Deferred revenue	122,223		157,042
	Income taxes payable	35,126		20,395
	Other	72,606		79,157
	Total	$	430,771	$	497,679
Other Long-Term Liabilities:
	Deferred income taxes	$	236,113	$	353,181
	Supplemental Executive Retirement Plan	49,163		46,931
	Long-Term Incentive Plan	—		15,650
	Accrued post-employment benefit obligations	4,648		7,511
	Other	22,326		15,737
	Total	$	312,250	$	439,010