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LONG-TERM DEBT - 2010 Notes (Details) - USD ($) $ in Thousands | Apr. 07, 2017 | Apr. 07, 2010
--- | --- | ---
2010 Notes |  |
LONG-TERM DEBT |  |
Principal |  | $ 600,000
Borrowings | $ 485,000 |
2010 Notes | Weighted Average |  |
LONG-TERM DEBT |  |
Interest rate |  | 6.59%
Maturity period |  | 9 years 10 months 2 days
Series A |  |
LONG-TERM DEBT |  |
Interest rate | 6.13% |
Repayments of non-current borrowings | $ 115,000 |
Series B |  |
LONG-TERM DEBT |  |
Principal |  | $ 360,000
Interest rate |  | 6.67%
Series C |  |
LONG-TERM DEBT |  |
Principal |  | $ 125,000
Interest rate |  | 6.77%

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