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LONG-TERM DEBT (Details 1) - 2022 Unsecured Notes [Member] | 12 Months Ended
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Dec. 31, 2017
2017 |
Long Term Debt [Line Items] |
Redemption price percentage of borrowings | 103.13%
2018 |
Long Term Debt [Line Items] |
Redemption price percentage of borrowings | 102.08%
2019 |
Long Term Debt [Line Items] |
Redemption price percentage of borrowings | 101.04%
2020 and thereafter |
Long Term Debt [Line Items] |
Redemption price percentage of borrowings | 100.00%

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- References No definition available. + Details
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Namespace Prefix: | ngd_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition The percentage rate of the aggregate principle amount that determines the redemption price of borrowings. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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