XML 56 R53.htm IDEA: XBRL DOCUMENT

Schedule of Vessel Commitments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014 Vessel
Significant Purchase and Supply Commitment [Line Items]
Number of Vessels, commitments	35
Total cost, commitments	$ 982,921
Invested, commitments	297,948
Remaining Balance, commitments	684,973
Deepwater PSVs
Significant Purchase and Supply Commitment [Line Items]
Number of vessels under construction	26
Total cost, under construction	843,784
Invested, under construction	230,331
Remaining Balance, under construction	613,453
Towing Supply Vessels
Significant Purchase and Supply Commitment [Line Items]
Number of vessels under construction	6
Total cost, under construction	116,143
Invested, under construction	55,909
Remaining Balance, under construction	60,234
Other
Significant Purchase and Supply Commitment [Line Items]
Number of vessels under construction	1
Total cost, under construction	8,014
Invested, under construction	8,014
Vessel Commitments
Significant Purchase and Supply Commitment [Line Items]
Number of Vessels, commitments	33
Total cost, commitments	967,941
Invested, commitments	294,254
Remaining Balance, commitments	673,687
Remotely Operated Vehicles Commitments
Significant Purchase and Supply Commitment [Line Items]
Number of Vessels, commitments	2
Total cost, commitments	14,980
Invested, commitments	3,694
Remaining Balance, commitments	$ 11,286