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Note 14 - Guarantor Subsidiaries (Details) - Condensed Consolidating Balance Sheets - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and cash equivalents | $ 174,454 | $ 209,665 | $ 222,360 | $ 212,175
Other current assets | 15,957 | 12,312 |  |
Properties, plants, and equipment - net | 1,878,177 | 1,831,564 |  |
Other non-current assets | 3,034 | 9,415 |  |
Total assets | 2,285,213 | 2,262,064 |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | 125,616 | 90,985 |  |
Long-term debt | 501,281 | 498,479 |  |
Non-current deferred tax liability | 125,753 | 153,300 |  |
Other non-current liabilities | 50,485 | 53,057 |  |
Stockholders' equity | 1,401,771 | 1,396,974 |  |
Total liabilities and stockholders' equity | 2,285,213 | 2,262,064 |  |
Consolidation, Eliminations [Member] |  |  |  |
Assets |  |  |  |
Other current assets | 19,573 | 27,433 |  |
Intercompany receivable (payable) | 46,082 | 46,245 |  |
Investments in subsidiaries | (1,373,915) | (1,317,969) |  |
Other non-current assets | (72,328) | (88,137) |  |
Total assets | (1,380,588) | (1,332,428) |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | (1,740) | (72) |  |
Non-current deferred tax liability | (4,933) | (14,387) |  |
Stockholders' equity | (1,373,915) | (1,317,969) |  |
Total liabilities and stockholders' equity | (1,380,588) | (1,332,428) |  |
Consolidated [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 174,454 | 209,665 | 222,360 | 212,175
Other current assets | 116,709 | 106,694 |  |
Properties, plants, and equipment - net | 1,878,177 | 1,831,564 |  |
Other non-current assets | 115,873 | 114,141 |  |
Total assets | 2,285,213 | 2,262,064 |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | 125,616 | 90,985 |  |
Long-term debt | 510,766 | 512,129 |  |
Non-current portion of accrued reclamation | 70,822 | 55,619 |  |
Non-current deferred tax liability | 125,753 | 153,300 |  |
Other non-current liabilities | 50,485 | 53,057 |  |
Stockholders' equity | 1,401,771 | 1,396,974 |  |
Total liabilities and stockholders' equity | 2,285,213 | 2,262,064 |  |
Parent Company [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 123,585 | 146,885 | 151,739 | 126,271
Other current assets | 5,486 | 7,115 |  |
Properties, plants, and equipment - net | 1,522 | 1,572 |  |
Intercompany receivable (payable) | 459,203 | 470,306 |  |
Investments in subsidiaries | 1,373,915 | 1,317,969 |  |
Other non-current assets | 2,339 | 8,644 |  |
Total assets | 1,966,050 | 1,952,491 |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | 21,123 | 14,143 |  |
Long-term debt | 499,417 | 498,479 |  |
Other non-current liabilities | 43,739 | 42,895 |  |
Stockholders' equity | 1,401,771 | 1,396,974 |  |
Total liabilities and stockholders' equity | 1,966,050 | 1,952,491 |  |
Guarantor Subsidiaries [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 45,082 | 33,824 | 48,205 | 40,009
Other current assets | 56,780 | 48,981 |  |
Properties, plants, and equipment - net | 1,131,491 | 1,079,658 |  |
Intercompany receivable (payable) | (141,131) | (123,671) |  |
Other non-current assets | 183,590 | 189,014 |  |
Total assets | 1,275,812 | 1,227,806 |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | 84,121 | 54,918 |  |
Long-term debt | 10,343 | 10,597 |  |
Non-current portion of accrued reclamation | 42,708 | 43,314 |  |
Non-current deferred tax liability | 5,211 | 14,387 |  |
Other non-current liabilities | 6,765 | 11,126 |  |
Stockholders' equity | 1,126,664 | 1,093,464 |  |
Total liabilities and stockholders' equity | 1,275,812 | 1,227,806 |  |
Non-Guarantor Subsidiaries [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 5,787 | 28,956 | $ 22,416 | $ 45,895
Other current assets | 34,870 | 23,165 |  |
Properties, plants, and equipment - net | 745,164 | 750,334 |  |
Intercompany receivable (payable) | (364,154) | (392,880) |  |
Other non-current assets | 2,272 | 4,620 |  |
Total assets | 423,939 | 414,195 |  |
Liabilities and Shareholders' Equity |  |  |  |
Current liabilities | 22,112 | 21,996 |  |
Long-term debt | 1,006 | 3,053 |  |
Non-current portion of accrued reclamation | 28,114 | 12,305 |  |
Non-current deferred tax liability | 125,475 | 153,300 |  |
Other non-current liabilities | (19) | (964) |  |
Stockholders' equity | 247,251 | 224,505 |  |
Total liabilities and stockholders' equity | $ 423,939 | $ 414,195 |  |

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