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INCOME AND MINING TAXES (Tables) | 12 Months Ended
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Dec. 31, 2017
INCOME AND MINING TAXES. |
Schedule of deferred income tax recovery (expense) |
|  | 2017 |  | 2016 |  | 2015
United States |  | $ | 10,349 |  | $ | 515 |  | $ | (442)
Foreign |  |  | 5,020 |  |  | 3,234 |  |  | 25,002
Deferred tax benefit |  | $ | 15,369 |  | $ | 3,749 |  | $ | 24,560
Schedule of net income (loss) before tax |
|  | 2017 |  | 2016 |  | 2015
United States |  | $ | (19,913) |  | $ | (13,959) |  | $ | (19,935)
Foreign |  |  | (6,090) |  |  | 31,265 |  |  | (25,075)
Net (loss) income before tax |  | $ | (26,003) |  | $ | 17,306 |  | $ | (45,010)
Schedule of reconciliation of the tax provision at statutory U.S. Federal and State income tax rates to the actual tax provision recorded in the financial statement |
Expected tax recovery at |  | 2017 |  | 2016 |  | 2015 |
(Loss) income before income and mining taxes |  | $ | (26,003) |  | $ | 17,306 |  | $ | (45,010) |
Statutory tax rate |  |  | 35% |  |  | 34% |  |  | 34% |
US Federal and State tax recovery at statutory rate |  |  | (9,101) |  |  | 5,884 |  |  | (15,303) |
Reconciling items: |  |  |  |  |  |  |  |  |  |
Equity pickup in MSC |  |  | (16) |  |  | (4,533) |  |  | (821) |
Impairment of MSC |  |  | — |  |  | — |  |  | 4,004 |
Deferred foreign income inclusion |  |  | 21,002 |  |  | — |  |  | — |
Foreign tax credits |  |  | (16,628) |  |  | — |  |  | — |
Tax rate changes |  |  | 28,048 |  |  | — |  |  | — |
Revisions to prior year estimates |  |  | (573) |  |  | (828) |  |  | 906 |
Adjustment for foreign tax rates |  |  | 115 |  |  | (501) |  |  | (1,230) |
Other permanent differences |  |  | (1,761) |  |  | 818 |  |  | (15,694) |
Unrealized foreign exchange rate (loss)/gain |  |  | 2,469 |  |  | 5,972 |  |  | 9,389 |
NOL expires and revisions |  |  | (2,233) |  |  | 586 |  |  | 1,215 |
Valuation allowance |  |  | (36,691) |  |  | (11,147) |  |  | (7,026) |
Tax benefit |  | $ | (15,369) |  | $ | (3,749) |  | $ | (24,560) |
Schedule of tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities |
|  | 2017 |  | 2016 |
Deferred tax assets: |  |  |  |  |  |  |
Net operating loss carryforward |  | $ | 72,078 |  | $ | 96,312 |
Mineral Properties |  |  | 59,905 |  |  | 14,195 |
Other temporary differences |  |  | 862 |  |  | 1,114 |
Total gross deferred tax assets |  |  | 132,845 |  |  | 111,621 |
Less: valuation allowance |  |  | (123,648) |  |  | (111,621) |
Net deferred tax assets |  | $ | 9,197 |  | $ | — |
Deferred tax liabilities: |  |  |  |  |  |  |
Acquired mineral property interests |  |  | (17,627) |  |  | (23,655) |
Total deferred tax liabilities |  | $ | (17,627) |  | $ | (23,655) |
Total net deferred tax liability |  | $ | (8,430) |  | $ | (23,655) |
Summary of changes in valuation allowance |
For the year ended December 31, |  | Balance at beginning of period |  | Additions(a) |  | Deductions(b) |  | Balance at end of period
2017 |  | $ | 111,621 |  | $ | 51,220 |  | $ | (39,193) |  | $ | 123,648
2016 |  |  | 122,768 |  |  | 1,430 |  |  | (12,577) |  |  | 111,621
2015 |  |  | 129,794 |  |  | 6,873 |  |  | (13,899) |  |  | 122,768
| (a) |  | The additions to valuation allowance mainly results from the Company and its subsidiaries incurring losses and exploration expenses for tax purposes which do not meet the more-likely-than-not criterion for recognition of deferred tax assets.
| (b) |  | The reductions to valuation allowance mainly results from release of valuation allowance, reductions in deferred tax rates, expiration of the Company's tax attributes and foreign exchange reductions of tax attributes in Mexico and Argentina.
Summary of company’s non operating losses that can be applied against future taxable profit |
Country |  | Type of Loss |  | Amount |  | Expiry Period
United States(a) |  | Non-operating losses |  | $ | 165,654 |  | 2018-2037
Mexico |  | Non-operating losses |  |  | 33,355 |  | 2018-2027
Canada(a) |  | Non-operating losses |  |  | 29,906 |  | 2018-2037
Argentina(a) |  | Non-operating losses |  |  | 78,964 |  | 2018-2022
| (a) |  | The losses in the United States, Canada, and Argentina are part of multiple consolidating groups, and therefore, may be restricted in use to specific projects.

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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