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Income and Mining Taxes (Tables) | 12 Months Ended
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Dec. 31, 2016
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense (Benefit) | The components of the consolidated Income and mining tax (expense) benefit from continuing operations are below:
| Year ended December 31,
In thousands | 2016 |  | 2015 |  | 2014
Current: |  |  |  |  |  |  |  |
United States | $ | — |  |  | $ | 49 |  |  | $ | 904 |
United States — State mining taxes | (7,826 | ) |  | (4,305 | ) |  | (879 | )
United States — Foreign withholding tax | (4,263 | ) |  | — |  |  | (6,250 | )
Argentina | 10 |  |  | 715 |  |  | (71 | )
Australia | 14 |  |  | 130 |  |  | — |
Bolivia | 6,252 |  |  | (5,154 | ) |  | (4,008 | )
Canada | (1,841 | ) |  | (516 | ) |  | (145 | )
Mexico | (9,581 | ) |  | (476 | ) |  | (10,122 | )
Deferred: |  |  |  |  |
United States | 15,556 |  |  | 1,778 |  |  | 5,743 |
United States — State mining taxes | 748 |  |  | 1,952 |  |  | — |
Argentina | 115 |  |  | (1,197 | ) |  | 24,478 |
Australia | (1,638 | ) |  | 3,223 |  |  | (401 | )
Bolivia | — |  |  | — |  |  | 22,122 |
Canada | 1,338 |  |  | 2,875 |  |  | 2,662 |
Mexico | 55,383 |  |  | 27,189 |  |  | 394,221 |
New Zealand | (28 | ) |  | — |  |  | — |
Income tax (expense) benefit | $ | 54,239 |  |  | $ | 26,263 |  |  | $ | 428,254 |
The components of Income (loss) before income taxes are below:
| Year ended December 31,
In thousands | 2016 |  | 2015 |  | 2014
United States | $ | (13,112 | ) |  | $ | (43,924 | ) |  | $ | (213,883 | )
Foreign | 14,225 |  |  | (349,522 | ) |  | (1,401,245 | )
Total | $ | 1,113 |  |  | $ | (393,446 | ) |  | $ | (1,615,128 | )
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | A reconciliation of the Company’s effective tax rate with the federal statutory tax rate for the periods indicated is below:
| Year ended December 31,
In thousands | 2016 |  | 2015 |  | 2014
Income and mining tax (expense) benefit at statutory rate | $ | (390 | ) |  | $ | 137,706 |  |  | $ | 565,295 |
State tax provision from continuing operations | 336 |  |  | (2,075 | ) |  | 20,253 |
Change in valuation allowance | 61,146 |  |  | (101,027 | ) |  | (151,191 | )
Percentage depletion | 983 |  |  | — |  |  | — |
Uncertain tax positions | (4,619 | ) |  | (1,947 | ) |  | (4,425 | )
U.S. and foreign non-deductible expenses | (5,764 | ) |  | 1,365 |  |  | (4,892 | )
Mineral interest related | — |  |  | (19,310 | ) |  | — |
Foreign exchange rates | 19,701 |  |  | 22,350 |  |  | 23,672 |
Foreign inflation and indexing | 2,794 |  |  | 1,117 |  |  | 3,765 |
Foreign tax rate differences | 413 |  |  | (15,980 | ) |  | (63,930 | )
Foreign withholding and other taxes | (13,478 | ) |  | 8,140 |  |  | 82,884 |
Foreign tax credits and other, net | 102 |  |  | (4,076 | ) |  | (43,177 | )
Legal entity reorganization | (6,985 | ) |  | — |  |  | — |
Income and mining tax (expense) benefit | $ | 54,239 |  |  | $ | 26,263 |  |  | $ | 428,254 |
Schedule of Deferred Tax Assets and Liabilities | At December 31, 2016 and 2015, the significant components of the Company’s deferred tax assets and liabilities are below:
| Year ended December 31,
In thousands | 2016 |  | 2015
Deferred tax liabilities: |  |  |  |  |
Mexican mining tax | $ | — |  |  | $ | 15,451 |
Mineral properties | 69,799 |  |  | — |
Foreign subsidiaries — unremitted earnings | 1,302 |  |  | 12,999 |
Inventory | 4,426 |  |  | 2,353 |
Royalty and other long-term debt | 8,685 |  |  | 1,648 |
| $ | 84,212 |  |  | $ | 32,451 |
Deferred tax assets: |  |  |  |  |
Net operating loss carryforwards | 202,756 |  |  | 203,958 |
Mineral properties | — |  |  | 34,966 |
Property, plant, and equipment | 87,978 |  |  | 6,980 |
Mexico Mining Tax | 6,359 |  |  | — |
Capital loss carryforwards | 6,770 |  |  | 3,938 |
Asset retirement obligation | 25,255 |  |  | 21,480 |
Unrealized foreign currency loss and other | 7,413 |  |  | 8,424 |
Accrued expenses | 17,713 |  |  | 17,905 |
Tax credit carryforwards | 31,272 |  |  | 26,439 |
| 385,516 |  |  | 324,090 |
Valuation allowance | (375,911 | ) |  | (436,829 | )
| 9,605 |  |  | (112,739 | )
Net deferred tax liabilities | $ | 74,607 |  |  | $ | 145,190 |
Summary of Valuation Allowance | Based upon this analysis, the Company has recorded valuation allowances as follows:
| Year ended December 31,
In thousands | 2016 |  | 2015
U.S. | $ | 292,446 |  |  | $ | 292,677 |
Argentina | 6,197 |  |  | 8,376 |
Canada | 1,296 |  |  | 1,718 |
Bolivia | 37,372 |  |  | 45,177 |
Mexico | 13,033 |  |  | 63,373 |
New Zealand | 23,717 |  |  | 25,508 |
Other | 1,850 |  |  | — |
| $ | 375,911 |  |  | $ | 436,829 |
Summary of Tax Credit Carryforwards | The Company has the following tax attribute carryforwards at December 31, 2016, by jurisdiction:
In thousands | U.S. |  | Argentina |  | Bolivia |  | Canada |  | Mexico |  | New Zealand |  | Other |  | Total
Regular net operating losses | $ | 330,469 |  |  | $ | 11,621 |  |  | $ | 63,005 |  |  | $ | 2,301 |  |  | $ | 91,383 |  |  | $ | 85,258 |  |  | $ | 63 |  |  | $ | 584,100 |
Alternative minimum tax net operating losses | 184,386 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 184,386 |
Capital losses | 19,315 |  |  | — |  |  | — |  |  | 79 |  |  | — |  |  | — |  |  | — |  |  | 19,394 |
Alternative minimum tax credits | 3,173 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3,173 |
Foreign tax credits | 24,161 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 24,161 |
Summary of Income Tax Contingencies | A reconciliation of the beginning and ending amount related to unrecognized tax benefits is below (in thousands):
Unrecognized tax benefits at January 1, 2014 | $ | 16,084 |
Gross increase to current period tax positions | 1,030 |
Gross increase to prior period tax positions | 810 |
Reductions in unrecognized tax benefits resulting from a lapse of the applicable statute of limitations | — |
Unrecognized tax benefits at December 31, 2015 | $ | 17,924 |
Gross increase to current period tax positions | 1,336 |
Gross increase to prior period tax positions | 4,854 |
Reductions in unrecognized tax benefits resulting from a lapse of the applicable statute of limitations | (704 | )
Unrecognized tax benefits at December 31, 2016 | $ | 23,410 |

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