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Income and Mining Taxes (Tables) | 12 Months Ended
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Dec. 31, 2015
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 | 2015 |  | 2014 |  | 2013
Current: |  |  |  |  |  |  |  |
United States | $ | 49 |  |  | $ | 904 |  |  | $ | 4 |
United States — State mining taxes | (4,305 | ) |  | (879 | ) |  | (714 | )
United States — Foreign withholding tax | — |  |  | (6,250 | ) |  | 397 |
Argentina | 715 |  |  | (71 | ) |  | (137 | )
Australia | 130 |  |  | — |  |  | (914 | )
Mexico | (476 | ) |  | (10,122 | ) |  | (9,046 | )
Bolivia | (5,154 | ) |  | (4,008 | ) |  | (6,716 | )
Canada | (516 | ) |  | (145 | ) |  | (1,936 | )
Deferred: |  |  |  |  |
Argentina | (1,197 | ) |  | 24,478 |  |  | 8,062 |
Australia | 3,223 |  |  | (401 | ) |  | (2 | )
Bolivia | — |  |  | 22,122 |  |  | (4,222 | )
Canada | 2,875 |  |  | 2,662 |  |  | — |
Mexico | 27,189 |  |  | 394,221 |  |  | 94,851 |
United States | 1,778 |  |  | 5,743 |  |  | 78,489 |
United States — State mining taxes | 1,952 |  |  | — |  |  | — |
Income tax (expense) benefit | $ | 26,263 |  |  | $ | 428,254 |  |  | $ | 158,116 |
The components of Income (loss) before income taxes are below:
| Year ended December 31,
In thousands | 2015 |  | 2014 |  | 2013
United States | $ | (43,924 | ) |  | $ | (213,883 | ) |  | $ | (242,562 | )
Foreign | (349,522 | ) |  | (1,401,245 | ) |  | (566,117 | )
Total | $ | (393,446 | ) |  | $ | (1,615,128 | ) |  | $ | (808,679 | )
Schedule of Effective Income Tax Rate Reconciliation | 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 | 2015 |  | 2014 |  | 2013
Income and mining tax benefit (expense) at statutory rate | $ | 137,706 |  |  | $ | 565,295 |  |  | $ | 283,038 |
State tax provision from continuing operations | (2,075 | ) |  | 20,253 |  |  | 2,245 |
Change in valuation allowance | (101,027 | ) |  | (151,191 | ) |  | (106,802 | )
Non-deductible imputed interest | — |  |  | — |  |  | (214 | )
Uncertain tax positions | (1,947 | ) |  | (4,425 | ) |  | (5,209 | )
U.S. and foreign non-deductible expenses | 1,365 |  |  | (4,892 | ) |  | (2,383 | )
Mineral interest related | (19,310 | ) |  | — |  |  | — |
Foreign exchange rates | 22,350 |  |  | 23,672 |  |  | 13,937 |
Foreign inflation and indexing | 1,117 |  |  | 3,765 |  |  | 2,937 |
Foreign tax rate differences | (15,980 | ) |  | (63,930 | ) |  | (24,108 | )
Foreign withholding and other taxes | 8,140 |  |  | 82,884 |  |  | (100,331 | )
Foreign tax credits and other, net | (4,076 | ) |  | (43,177 | ) |  | 13,153 |
Mexico permanent reinvestment assertion | — |  |  | — |  |  | 81,853 |
Income and mining tax benefit (expense) | $ | 26,263 |  |  | $ | 428,254 |  |  | $ | 158,116 |
Schedule of Deferred Tax Assets and Liabilities | At December 31, 2015 and 2014, the significant components of the Company’s deferred tax assets and liabilities are below:
| Year ended December 31,
In thousands | 2015 |  | 2014
Deferred tax liabilities: |  |  |  |  |
Mexican mining tax | $ | 15,451 |  |  | $ | 8,065 |
Foreign subsidiaries — unremitted earnings | 12,999 |  |  | 45,249 |
Inventory | 2,353 |  |  | 3,135 |
Royalty and other long-term debt | 1,648 |  |  | — |
| $ | 32,451 |  |  | $ | 56,449 |
Deferred tax assets: |  |  |  |  |
Net operating loss carryforwards | 203,958 |  |  | 153,701 |
Mineral properties | 34,966 |  |  | 46,006 |
Property, plant, and equipment | 6,980 |  |  | 38,091 |
Royalty and other long-term debt | — |  |  | 5,863 |
Capital loss carryforwards | 3,938 |  |  | 35,251 |
Asset retirement obligation | 21,480 |  |  | 21,586 |
Unrealized foreign currency loss and other | 8,424 |  |  | 8,213 |
Accrued expenses | 17,905 |  |  | 9,365 |
Tax credit carryforwards | 26,439 |  |  | 56,322 |
| 324,090 |  |  | 374,398 |
Valuation allowance | (436,829 | ) |  | (391,510 | )
| (112,739 | ) |  | (17,112 | )
Net deferred tax liabilities | $ | 145,190 |  |  | $ | 73,561 |
Summary of Valuation Allowance | Based upon this analysis, the Company has recorded valuation allowances as follows:
| Year ended December 31,
In thousands | 2015 |  | 2014
U.S. | $ | 292,677 |  |  | $ | 305,534 |
Argentina | 8,376 |  |  | 21,520 |
Canada | 1,718 |  |  | 2,009 |
Bolivia | 45,177 |  |  | 15,948 |
Mexico | 63,373 |  |  | 14,816 |
New Zealand | 25,508 |  |  | 28,710 |
Other | — |  |  | 2,973 |
| $ | 436,829 |  |  | $ | 391,510 |
Summary of Tax Credit Carryforwards | The Company has the following tax attribute carryforwards at December 31, 2015, by jurisdiction:
In thousands | U.S. |  | Argentina |  | Bolivia |  | Canada |  | Mexico |  | New Zealand |  | Other |  | Total
Regular net operating losses | 320,511 |  |  | 12,210 |  |  | 55,019 |  |  | 2,182 |  |  | 108,191 |  |  | 91,096 |  |  | 68 |  |  | 589,277 |
Alternative minimum tax net operating losses | 187,376 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 187,376 |
Capital losses | 11,195 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 11,195 |
Alternative minimum tax credits | 3,173 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3,173 |
Foreign tax credits | 19,898 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 19,898 |
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 | $ | 15,471 |
Gross increase to current period tax positions | 1,856 |
Gross increase to prior period tax positions | 524 |
Reductions in unrecognized tax benefits resulting from a lapse of the applicable statute of limitations | (1,767 | )
Unrecognized tax benefits at December 31, 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 |

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