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Indebtedness - Senior Notes, Revolving Credit and Term Loan Agreement - Additional Information (Detail) - May. 31, 2015 - USD ($) | Total
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Troms Offshore Supply AS | Senior Notes Due Twenty Twenty Seven [Member] |
Debt [Line Items] |
Debt instruments face amount | $ 31,300,000
Debt instrument maturity, month and year | 2027-04
Semi-annual principal payments | $ 1,300,000
Debt instrument bearing floating interest rate | 2.92%
Indebtedness rate | 1.30%
Total capitalization rate | 4.22%
Current Credit Facility |
Debt [Line Items] |
Credit facility expiration date | 2019-06
Revolving credit facility | $ 900,000,000
Credit facility term | 5 years
Revolving line of credit | $ 600,000,000
Term loan | $ 300,000,000

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