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INDEBTEDNESS (Tables) | 9 Months Ended
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Dec. 31, 2017
Summary of Debt Outstanding | The following table summarizes debt outstanding based on stated maturities:
|  | Successor |  |  |  | Predecessor |
|  | December 31, |  |  |  | March 31, |
(In thousands) |  | 2017 |  |  |  | 2017 |
Bank loan agreement: |  |  |  |  |  |  |  |  |
Bank term loan due July 2019 |  | $ | — |  |  |  |  | 300,000 |
Revolving line of credit due July 2019 |  |  | — |  |  |  |  | 600,000 |
September 2010 senior notes: |  |  |  |  |  |  |  |  |
3.90% September 2010 senior notes due December 2017 |  |  | — |  |  |  |  | 44,500 |
3.95% September 2010 senior notes due December 2017 |  |  | — |  |  |  |  | 25,000 |
4.12% September 2010 senior notes due December 2018 |  |  | — |  |  |  |  | 25,000 |
4.17% September 2010 senior notes due December 2018 |  |  | — |  |  |  |  | 25,000 |
4.33% September 2010 senior notes due December 2019 |  |  | — |  |  |  |  | 50,000 |
4.51% September 2010 senior notes due December 2020 |  |  | — |  |  |  |  | 100,000 |
4.56% September 2010 senior notes due December 2020 |  |  | — |  |  |  |  | 65,000 |
4.61% September 2010 senior notes due December 2022 |  |  | — |  |  |  |  | 48,000 |
August 2011 senior notes: |  |  |  |  |  |  |  |  |
4.06% August 2011 senior notes due March 2019 |  |  | — |  |  |  |  | 50,000 |
4.54% August 2011 senior notes due June 2021 |  |  | — |  |  |  |  | 65,000 |
4.64% August 2011 senior notes due June 2021 |  |  | — |  |  |  |  | 50,000 |
September 2013 senior notes: |  |  |  |  |  |  |  |  |
4.26% September 2013 senior notes due November 2020 |  |  | — |  |  |  |  | 123,000 |
5.01% September 2013 senior notes due November 2023 |  |  | — |  |  |  |  | 250,000 |
5.16% September 2013 senior notes due November 2025 |  |  | — |  |  |  |  | 127,000 |
New secured notes: |  |  |  |  |  |  |  |  |
8.00% New secured notes due August 2022 |  |  | 350,000 |  |  |  |  | — |
New secured notes - premium |  |  | 14,329 |  |  |  |  | — |
Troms Offshore borrowings: |  |  |  |  |  |  |  |  |
NOK denominated notes due May 2024 |  |  | 14,054 |  |  |  |  | 14,864 |
NOK denominated notes due May 2024 - premium |  |  | 115 |  |  |  |  | — |
NOK denominated notes due January 2026 |  |  | 25,965 |  |  |  |  | 26,167 |
NOK denominated notes due January 2026 - discount |  |  | (1,586 | ) |  |  |  | — |
USD denominated notes due January 2027 |  |  | 23,345 |  |  |  |  | 24,573 |
USD denominated notes due January 2027 - discount |  |  | (1,678 | ) |  |  |  | — |
USD denominated notes due April 2027 |  |  | 25,463 |  |  |  |  | 27,421 |
USD denominated notes due April 2027 - discount |  |  | (1,847 | ) |  |  |  | — |
|  | $ | 448,160 |  |  |  |  | 2,040,525 |
Less: Deferred debt issue costs |  |  | — |  |  |  |  | 6,401 |
Less: Current portion of long-term debt |  |  | 5,103 |  |  |  |  | 2,034,124 |
Total long-term debt |  | $ | 443,057 |  |  |  |  | — |
Debt Costs | Interest and debt costs incurred, net of interest capitalized are as follows:
|  | Successor |  |  |  | Predecessor |
|  | Period from |  |  |  | Period from |  |  |  |  |
|  | August 1, 2017 |  |  |  | April 1, 2017 |  |  |  |  |
|  | through |  |  |  | through |  |  | Year Ended |
(In thousands) |  | December 31, 2017 |  |  |  | July 31, 2017 |  |  | March 31, 2017 |
Interest and debt costs incurred, net of interest capitalized |  | $ | 13,009 |  |  |  |  | 11,179 |  |  |  | 75,026 |
Interest costs capitalized |  |  | 101 |  |  |  |  | 601 |  |  |  | 4,829 |
Total interest and debt costs |  | $ | 13,110 |  |  |  |  | 11,780 |  |  |  | 79,855 |
September 2013 Senior Notes |
Schedule of Aggregate Amount of Senior Unsecured Notes Outstanding | A summary of these notes is as follows:
|  | Successor |  |  |  | Predecessor |
|  | December 31, |  |  |  | March 31, |
(In thousands, except weighted average data) |  | 2017 |  |  |  | 2017 |
Aggregate debt outstanding |  | $ | — |  |  |  |  | 500,000 |
Weighted average remaining life in years |  |  | — |  |  |  |  | 6.4 |
Weighted average coupon rate on notes outstanding |  |  | — |  |  |  |  | 4.86 | %
Fair value of debt outstanding |  |  | — |  |  |  |  | 280,000 |
August 2011 Senior Notes |
Schedule of Aggregate Amount of Senior Unsecured Notes Outstanding | A summary of these notes is as follows
|  | Successor |  |  |  | Predecessor |
|  | December 31, |  |  |  | March 31, |
(In thousands, except weighted average data) |  | 2017 |  |  |  | 2017 |
Aggregate debt outstanding |  | $ | — |  |  |  |  | 165,000 |
Weighted average remaining life in years |  |  | — |  |  |  |  | 3.6 |
Weighted average coupon rate on notes outstanding |  |  | — |  |  |  |  | 4.42 | %
Fair value of debt outstanding |  |  | — |  |  |  |  | 92,400 |
September 2010 Senior Notes |
Schedule of Aggregate Amount of Senior Unsecured Notes Outstanding | A summary of these notes is as follows:
|  | Successor |  |  |  | Predecessor |
|  | December 31, |  |  |  | March 31, |
(In thousands, except weighted average data) |  | 2017 |  |  |  | 2017 |
Aggregate debt outstanding |  | $ | — |  |  |  |  | 382,500 |
Weighted average remaining life in years |  |  | — |  |  |  |  | 3.1 |
Weighted average coupon rate on notes outstanding |  |  | — |  |  |  |  | 4.35 | %
Fair value of debt outstanding |  |  | — |  |  |  |  | 214,200 |
Troms Offshore Supply AS |
Summary of Debt Outstanding | A summary of NOK denominated Troms Offshore borrowings outstanding and their U.S. dollar equivalents is as follows:
|  | Successor |  |  |  | Predecessor |
|  | December 31, |  |  |  | March 31, |
(In thousands) |  | 2017 |  |  |  | 2017 |
January 2014 notes: |  |  |  |  |  |  |  |  |
NOK denominated |  |  | 212,500 |  |  |  |  | 225,000 |
U.S. dollar equivalent |  | $ | 25,965 |  |  |  |  | 26,167 |
Fair value in U.S. dollar equivalent (Level 2) |  |  | 25,850 |  |  |  |  | 26,133 |
May 2012 notes: |  |  |  |  |  |  |  |  |
NOK denominated |  |  | 115,020 |  |  |  |  | 127,800 |
U.S. dollar equivalent |  | $ | 14,054 |  |  |  |  | 14,864 |
Fair value in U.S. dollar equivalent (Level 2) |  |  | 14,013 |  |  |  |  | 14,793 |
Schedule of Aggregate Amount of Senior Unsecured Notes Outstanding | A summary of U.S. dollar denominated Troms Offshore borrowings outstanding is as follows:
|  | Successor |  |  |  | Predecessor |
|  | December 31, |  |  |  | March 31, |
(In thousands) |  | 2017 |  |  |  | 2017 |
May 2015 notes |  |  |  |  |  |  |  |  |
Amount outstanding |  | $ | 25,463 |  |  |  |  | 27,421 |
Fair value of debt outstanding (Level 2) |  |  | 25,427 |  |  |  |  | 27,395 |
March 2015 notes |  |  |  |  |  |  |  |  |
Amount outstanding |  | $ | 23,345 |  |  |  |  | 24,573 |
Fair value of debt outstanding (Level 2) |  |  | 23,251 |  |  |  |  | 24,544 |

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