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Debt (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 31, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Mar. 31, 2017 | Dec. 31, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  | $ 9,342,000 | $ 0 | $ 9,342,000 | $ 0 |  |
Senior Notes due 2021 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 7.875% |  | 7.875% |  | 7.875% |
Banco Bisa Line of Credit [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 12,000,000 |  | $ 12,000,000 |  |  |
Line of Credit Facility, Interest Rate at Period End |  | 6.00% |  | 6.00% |  |  |
Senior Notes due 2024 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount (Premium), Net |  | $ 5,200,000 |  | $ 5,200,000 |  |  |
Debt Instrument, Face Amount | $ 250,000,000 |  |  |  |  |  |
Proceeds from Debt | $ 245,000,000 |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.875% |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 100.00% |  |  |  |  |  |
Senior Notes due 2021 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount (Premium), Net |  |  |  |  |  |  | $ 2,000,000
Debt Instrument, Repurchase Amount |  | 178,000,000 |  | 178,000,000 |  |  |
Gain (Loss) on Extinguishment of Debt |  | 9,300,000 |  |  |  |  |
San Bartolome Letter of Credit Facility [Member] |  |  |  |  |  |  |
Debt and capital lease obligations (Textual) [Abstract] |  |  |  |  |  |  |
Line of Credit Facility, Fair Value of Amount Outstanding |  | 0 |  | 0 |  |  |
Debt Instrument, Redemption, Equity Offering [Member] | Senior Notes due 2024 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed | 35.00% |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 105.875% |  |  |  |  |  |
Debt Instrument, Tender [Member] | Senior Notes due 2021 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount | $ 118,100,000 |  |  |  |  |  |
Debt Instrument, Redemption Price, Per $1,000 Principal | $ 1,043.88 |  |  |  |  |  |
Debt Instrument, Redeemed [Member] | Senior Notes due 2021 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  | 59,900,000 |  | 59,900,000 |  |  |
Debt Instrument, Redemption Price, Per $1,000 Principal |  | $ 1,039.38 |  | $ 1,039.38 |  |  |

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