XML 28 R124.htm IDEA: XBRL DOCUMENT

Schedule of Vessel Commitments (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014 Vessel
Significant Purchase and Supply Commitment [Line Items]
Number of Vessels, commitments	30
Total cost, commitments	$ 833,185
Invested, commitments	259,645
Remaining Balance, commitments	573,540
Deepwater PSVs
Significant Purchase and Supply Commitment [Line Items]
Number of vessels under construction	23
Total cost, under construction	708,883
Invested, under construction	196,468
Remaining Balance, under construction	512,415
Towing Supply Vessels
Significant Purchase and Supply Commitment [Line Items]
Number of vessels under construction	6
Total cost, under construction	116,288
Invested, under construction	55,163
Remaining Balance, under construction	61,125
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