Selected Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2014

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)		2015		2014
Inventory:
	Remotely operated vehicle parts and components	$	163,539	$	207,885
	Other inventory, primarily raw materials	164,914		167,703
	Total	$	328,453	$	375,588
Other Current Assets:
	Deferred income taxes	$	57,337	$	49,809
	Prepaid expenses	133,683		79,067
	Total	$	191,020	$	128,876
Other Non-Current Assets:
	Intangible assets, net	$	93,701	$	60,895
	Cash surrender value of life insurance policies	55,924		53,653
	Investment in unconsolidated affiliates	49,144		32,624
	Other	19,671		6,922
	Total	$	218,440	$	154,094
Accrued Liabilities:
	Payroll and related costs	$	161,228	$	209,481
	Accrued job costs	79,857		79,894
	Deferred revenue	157,042		116,936
	Other	79,157		83,949
	Total	$	477,284	$	490,260
Other Long-Term Liabilities:
	Deferred income taxes	$	353,181	$	322,758
	Supplemental Executive Retirement Plan	46,931		45,423
	Long-Term Incentive Plan	15,650		29,482
	Accrued post-employment benefit obligations	7,511		11,349
	Other	15,737		15,851
	Total	$	439,010	$	424,863