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INDEBTEDNESS (Tables) | 12 Months Ended
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Mar. 31, 2017
Summary of Debt Outstanding | The following table summarizes debt outstanding at March 31 based on stated maturities:
(In thousands) |  | 2017 |  |  | 2016 |
3.90% September 2010 senior notes due fiscal 2018 |  | $ | 44,500 |  |  |  | 44,500 |
3.95% September 2010 senior notes due fiscal 2018 |  |  | 25,000 |  |  |  | 25,000 |
4.12% September 2010 senior notes due fiscal 2019 |  |  | 25,000 |  |  |  | 25,000 |
4.17% September 2010 senior notes due fiscal 2019 |  |  | 25,000 |  |  |  | 25,000 |
4.33% September 2010 senior notes due fiscal 2020 |  |  | 50,000 |  |  |  | 50,000 |
4.51% September 2010 senior notes due fiscal 2021 |  |  | 100,000 |  |  |  | 100,000 |
4.56% September 2010 senior notes due fiscal 2021 |  |  | 65,000 |  |  |  | 65,000 |
4.61% September 2010 senior notes due fiscal 2023 |  |  | 48,000 |  |  |  | 48,000 |
4.06% August 2011 senior notes due fiscal 2019 |  |  | 50,000 |  |  |  | 50,000 |
4.54% August 2011 senior notes due fiscal 2022 |  |  | 65,000 |  |  |  | 65,000 |
4.64% August 2011 senior notes due fiscal 2022 |  |  | 50,000 |  |  |  | 50,000 |
4.26% September 2013 senior notes due fiscal 2021 |  |  | 123,000 |  |  |  | 123,000 |
5.01% September 2013 senior notes due fiscal 2024 |  |  | 250,000 |  |  |  | 250,000 |
5.16% September 2013 senior notes due fiscal 2026 |  |  | 127,000 |  |  |  | 127,000 |
NOK denominated notes due fiscal 2025 |  |  | 14,864 |  |  |  | 17,500 |
NOK denominated notes due fiscal 2026 |  |  | 26,167 |  |  |  | 30,207 |
USD denominated notes due fiscal 2027 |  |  | 24,573 |  |  |  | 27,030 |
USD denominated notes due fiscal 2028 |  |  | 27,421 |  |  |  | 30,033 |
Bank term loan due fiscal 2020 |  |  | 300,000 |  |  |  | 300,000 |
Revolving line of credit due fiscal 2020 |  |  | 600,000 |  |  |  | 600,000 |
|  | $ | 2,040,525 |  |  |  | 2,052,270 |
Less: Deferred debt issue costs |  |  | 6,401 |  |  |  | 6,754 |
Total debt |  | $ | 2,034,124 |  |  |  | 2,045,516 |
Troms Offshore Supply AS |
Schedule of Aggregate Amount of Senior Unsecured Notes Outstanding | A summary of U.S. dollar denominated Troms Offshore borrowings outstanding at March 31, is as follows:
(In thousands) |  | March 31, 2017 |  |  | March 31, 2016 |
May 2015 notes (A) |  |  |  |  |  |  |  |
Amount outstanding |  | $ | 27,421 |  |  |  | 30,033 |
Fair value of debt outstanding (Level 2) |  |  | 27,395 |  |  |  | 30,062 |
March 2015 notes (A) |  |  |  |  |  |  |  |
Amount outstanding |  | $ | 24,573 |  |  |  | 27,030 |
Fair value of debt outstanding (Level 2) |  |  | 24,544 |  |  |  | 27,027 |
Summary of Debt Outstanding | A summary of Norwegian Kroner (NOK) denominated Troms Offshore borrowings outstanding at March 31, and their U.S. dollar equivalents is as follows:
(In thousands) |  | March 31, 2017 |  |  | March 31, 2016 |
4.31% January 2014 notes (A): |  |  |  |  |  |  |  |
NOK denominated |  |  | 225,000 |  |  |  | 250,000 |
U.S. dollar equivalent |  | $ | 26,167 |  |  |  | 30,207 |
Fair value in U.S. dollar equivalent (Level 2) |  |  | 26,133 |  |  |  | 30,199 |
5.88% May 2012 notes (A): |  |  |  |  |  |  |  |
NOK denominated |  |  | 127,800 |  |  |  | 144,840 |
U.S. dollar equivalent |  | $ | 14,864 |  |  |  | 17,500 |
Fair value in U.S. dollar equivalent (Level 2) |  |  | 14,793 |  |  |  | 17,479 |
| (A) | Note requires semi-annual principal payments.
Debt Costs | Interest and debt costs incurred, net of interest capitalized, for the years ended March 31, are as follows:
(In thousands) |  | 2017 |  |  | 2016 |  |  | 2015 |
Interest and debt costs incurred, net of interest capitalized |  | $ | 75,026 |  |  |  | 53,752 |  |  |  | 50,029 |
Interest costs capitalized |  |  | 4,829 |  |  |  | 10,451 |  |  |  | 13,673 |
Total interest and debt costs |  | $ | 79,855 |  |  |  | 64,203 |  |  |  | 63,702 |
September 2013 Senior Notes |
Schedule of Aggregate Amount of Senior Unsecured Notes Outstanding | A summary of these outstanding notes at March 31, is as follows:
(In thousands, except weighted average data) |  | 2017 |  |  | 2016 |
Aggregate debt outstanding |  | $ | 500,000 |  |  |  | 500,000 |
Weighted average remaining life in years |  |  | 6.4 |  |  |  | 7.4 |
Weighted average coupon rate on notes outstanding |  |  | 4.86 | % |  |  | 4.86 | %
Fair value of debt outstanding |  |  | 280,000 |  |  |  | 342,746 |
August 2011 Senior Notes |
Schedule of Aggregate Amount of Senior Unsecured Notes Outstanding | A summary of these outstanding notes at March 31, is as follows
(In thousands, except weighted average data) |  | 2017 |  |  | 2016 |
Aggregate debt outstanding |  | $ | 165,000 |  |  |  | 165,000 |
Weighted average remaining life in years |  |  | 3.6 |  |  |  | 4.6 |
Weighted average coupon rate on notes outstanding |  |  | 4.42 | % |  |  | 4.42 | %
Fair value of debt outstanding |  |  | 92,400 |  |  |  | 127,148 |
September 2010 Senior Notes |
Schedule of Aggregate Amount of Senior Unsecured Notes Outstanding | A summary of the aggregate amount of these outstanding notes at March 31, is as follows:
(In thousands, except weighted average data) |  | 2017 |  |  | 2016 |
Aggregate debt outstanding |  | $ | 382,500 |  |  |  | 382,500 |
Weighted average remaining life in years |  |  | 3.1 |  |  |  | 4.1 |
Weighted average coupon rate on notes outstanding |  |  | 4.35 | % |  |  | 4.35 | %
Fair value of debt outstanding |  |  | 214,200 |  |  |  | 302,832 |

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