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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2013
Income Taxes [Abstract] |
Reconciliation of income taxes at statutory rates |
|  |  | Years ended December 31,
|  |  | 2013 |  | 2012 |  | 2011
Income taxed at statutory rates | $ | (28,916) | $ | (34,860) | $ | 33,846
Increase (decrease) in taxes from: |  |  |  |  |  |
| Stock-based compensation |  | 13 |  | 147 |  | 113
| Debt discount interest |  | - |  | - |  | (2)
| Meals and entertainment |  | 9 |  | 3 |  | 5
| Loss related to Mexico |  | (2,632) |  | - |  | -
| Other adjustments |  | (9) |  | 6 |  | 77
| Adjustment due to capital transactions |  | (60) |  | (733) |  | 89
| Imputed interest |  | 3 |  | 24 |  | 82
| Realized fx gain (loss) on intercompany balances |  | (3) |  | (3) |  | -
| Prior year provision to actual adjustments |  | 9,961 |  | (40) |  | 987
| Differences in tax rates |  | 3,451 |  | 3,905 |  | 1,930
| Effect of foreign exchange |  | - |  | (340) |  | 603
| Change in effective tax rate |  | (407) |  | (333) |  | (764)
| Expiration of NOLs |  | 437 |  | 70 |  | 1,526
| Change in valuation allowance |  | 2,780 |  | 12,007 |  | (2,970)
Income tax (benefit)/expense | $ | (15,373) | $ | (20,147) | $ | 35,522
Schedule of Deferred Tax Assets and Liabilities |
|  | December 31,
|  | 2013 |  | 2012 |  | 2011
Deferred income tax assets |  |  |  |  |  |
Excess tax basis over book basis of property, plant and equipment | $ | 7,496 | $ | 8,001 | $ | 6,011
Marketable securities |  | 661 |  | 62 |  | -
Operating loss carryforwards |  | 36,367 |  | 37,635 |  | 26,772
Capital loss carryforwards |  | 5,474 |  | 2,630 |  | 2,645
Other |  | 1,541 |  | 3,219 |  | 2,023
Unrealized foreign exchange on loans |  | 79 |  | 217 |  | 676
Total future tax assets |  | 51,618 |  | 51,764 |  | 38,127
Valuation allowance for future tax assets |  | (43,955) |  | (41,817) |  | (29,291)
|  | 7,663 |  | 9,947 |  | 8,836
Deferred income tax liabilities |  |  |  |  |  |
Marketable securities |  | - |  | - |  | 14,092
Other investments |  | 7,181 |  | 24,839 |  | 29,784
Amayapampa disposal consideration |  | 482 |  | 482 |  | 482
|  | 7,663 |  | 25,321 |  | 44,358
Total Deferred Taxes | $ | - | $ | (15,374) | $ | (35,522)
Summary of Tax Credit Carryforwards and Expirations |
|  | Noncapital |  |  |  |  |  |  |  |  |  |  |  |
|  | Canada (1) |  | U.S. |  | Mexico |  | Barbados |  | Total
2013 |  | $ | - |  | $ | - |  | $ | - |  | $ | - |  | $ | -
2014 |  |  | (725) |  |  | - |  |  | - |  |  | - |  |  | (725)
2015 |  |  | (889) |  |  | - |  |  | - |  |  | (2) |  |  | (891)
2016 |  |  | - |  |  | - |  |  | - |  |  | (1) |  |  | (1)
2017 |  |  | - |  |  | - |  |  | - |  |  | (6) |  |  | (6)
2018 |  |  | - |  |  | - |  |  | - |  |  | (20) |  |  | (20)
2019 |  |  | - |  |  | (519) |  |  | - |  |  | (42) |  |  | (561)
2020 |  |  | - |  |  | (783) |  |  | - |  |  | (20) |  |  | (802)
2021 |  |  | - |  |  | (779) |  |  | (613) |  |  | (31) |  |  | (1,423)
2022 |  |  | - |  |  | (748) |  |  | (7,942) |  |  | (23) |  |  | (8,712)
2023 |  |  | - |  |  | (691) |  |  | - |  |  | - |  |  | (691)
2024 |  |  | - |  |  | (2,082) |  |  | - |  |  | - |  |  | (2,082)
2025 |  |  | - |  |  | (2,362) |  |  | - |  |  | - |  |  | (2,362)
2026 |  |  | (1,027) |  |  | (1,213) |  |  | - |  |  | - |  |  | (2,240)
2027 |  |  | (847) |  |  | (1,700) |  |  | - |  |  | - |  |  | (2,547)
2028 |  |  | (5,245) |  |  | (1,719) |  |  | - |  |  | - |  |  | (6,964)
2029 |  |  | (4,022) |  |  | (1,970) |  |  | - |  |  | - |  |  | (5,992)
2030 |  |  | (5,032) |  |  | (1,827) |  |  | - |  |  | - |  |  | (6,859)
2031 |  |  | (3,806) |  |  | (3,407) |  |  | - |  |  | - |  |  | (7,213)
2032 |  |  | (6,397) |  |  | (2,323) |  |  | - |  |  | - |  |  | (8,720)
2033 |  |  | (9,397) |  |  | (2,250) |  |  | - |  |  | - |  |  | (11,647)
|  | $ | (37,387) |  | $ | (24,372) |  | $ | (8,555) |  | $ | (146) |  | $ | (70,459)
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] |
|  |  | Years ended December 31,
|  | 2013 |  | 2012 |  | 2011
U.S. |  | $ | (49,124) |  | $ | (52,448) |  | $ | 109,895
Canada |  |  | (9,540) |  |  | (11,962) |  |  | (985)
Other Foreign |  |  | (16,197) |  |  | (26,393) |  |  | (21,842)
|  | $ | (74,861) |  | $ | (90,803) |  | $ | 87,068
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  |  |  | Years ended December 31,
|  |  | 2013 |  | 2012 |  | 2011
Deferred income tax expense (benefit) |  |  |  |  |  |  |  |
| U.S. |  |  | (15,373) |  |  | (20,147) |  |  | 35,522
| Canada |  |  | - |  |  | - |  |  | -
| Other Foreign |  |  | - |  |  | - |  |  | -
Total tax expense (benefit) | $ | (15,373) |  | $ | (20,147) |  | $ | 35,522

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