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Note 13 - Guarantor Subsidiaries - Unaudited Interim Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Cash and cash equivalents | $ 172,923 | $ 169,777 | $ 167,844 | $ 155,209
Other current assets | 138,412 | 121,314 |  |
Properties, plants, and equipment - net | 2,025,607 | 2,032,685 |  |
Intercompany receivable (payable) |  |  |  |
Investments in subsidiaries |  |  |  |
Other non-current assets | 59,241 | 47,901 |  |
Identifiable assets | 2,396,183 | 2,371,677 |  |
Current liabilities | 115,797 | 126,225 |  |
Long-term debt | 509,353 | 506,817 |  |
Non-current portion of accrued reclamation | 80,758 | 79,927 |  |
Non-current deferred tax liability | 122,723 | 122,855 |  |
Other non-current liabilities | 54,611 | 56,009 |  |
Shareholders' equity | 1,512,941 | 1,479,844 |  |
Total liabilities and shareholders' equity | 2,396,183 | 2,371,677 |  |
Reportable Legal Entities [Member] | Parent Company [Member] |  |  |  |
Cash and cash equivalents | 101,061 | 113,275 | 109,756 | 94,167
Other current assets | 47,514 | 33,950 |  |
Properties, plants, and equipment - net | 1,964 | 2,103 |  |
Intercompany receivable (payable) | 461,542 | 404,121 |  |
Investments in subsidiaries | 1,491,449 | 1,496,787 |  |
Other non-current assets | 6,321 | 4,186 |  |
Identifiable assets | 2,109,851 | 2,054,422 |  |
Current liabilities | 46,720 | 22,401 |  |
Long-term debt | 501,917 | 500,979 |  |
Non-current portion of accrued reclamation |  |  |  |
Non-current deferred tax liability |  |  |  |
Other non-current liabilities | 48,273 | 51,198 |  |
Shareholders' equity | 1,512,941 | 1,479,844 |  |
Total liabilities and shareholders' equity | 2,109,851 | 2,054,422 |  |
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member] |  |  |  |
Cash and cash equivalents | 18,124 | 24,388 | 39,255 | 42,692
Other current assets | 51,190 | 52,400 |  |
Properties, plants, and equipment - net | 1,248,762 | 1,258,890 |  |
Intercompany receivable (payable) | (222,677) | (222,072) |  |
Investments in subsidiaries |  |  |  |
Other non-current assets | 199,794 | 199,957 |  |
Identifiable assets | 1,295,193 | 1,313,563 |  |
Current liabilities | 56,189 | 86,730 |  |
Long-term debt | 3,115 | 3,065 |  |
Non-current portion of accrued reclamation | 61,964 | 63,025 |  |
Non-current deferred tax liability | 13,349 | 14,212 |  |
Other non-current liabilities | 5,363 | 5,108 |  |
Shareholders' equity | 1,155,213 | 1,141,423 |  |
Total liabilities and shareholders' equity | 1,295,193 | 1,313,563 |  |
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member] |  |  |  |
Cash and cash equivalents | 53,738 | 32,114 | 18,833 | 18,350
Other current assets | 40,283 | 35,537 |  |
Properties, plants, and equipment - net | 774,881 | 771,692 |  |
Intercompany receivable (payable) | (351,019) | (307,018) |  |
Investments in subsidiaries |  |  |  |
Other non-current assets | 6,906 | 5,337 |  |
Identifiable assets | 524,789 | 537,662 |  |
Current liabilities | 38,183 | 40,093 |  |
Long-term debt | 4,321 | 2,773 |  |
Non-current portion of accrued reclamation | 18,794 | 16,902 |  |
Non-current deferred tax liability | 126,280 | 122,855 |  |
Other non-current liabilities | 975 | (325) |  |
Shareholders' equity | 336,236 | 355,364 |  |
Total liabilities and shareholders' equity | 524,789 | 537,662 |  |
Consolidation, Eliminations [Member] |  |  |  |
Cash and cash equivalents |  |  |  |
Other current assets | (575) | (573) |  |
Properties, plants, and equipment - net |  |  |  |
Intercompany receivable (payable) | 112,154 | 124,969 |  |
Investments in subsidiaries | (1,491,449) | (1,496,787) |  |
Other non-current assets | (153,780) | (161,579) |  |
Identifiable assets | (1,533,650) | (1,533,970) |  |
Current liabilities | (25,295) | (22,999) |  |
Long-term debt |  |  |  |
Non-current portion of accrued reclamation |  |  |  |
Non-current deferred tax liability | (16,906) | (14,212) |  |
Other non-current liabilities |  | 28 |  |
Shareholders' equity | (1,491,449) | (1,496,787) |  |
Total liabilities and shareholders' equity | $ (1,533,650) | $ (1,533,970) |  |

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