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INCOME TAXES (Tables) | 12 Months Ended
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Jun. 30, 2015
INCOME TAXES |
Components of income before income taxes |
|  | Fiscal Years Ended June 30, |
|  | 2015 |  | 2014 |  | 2013 |
|  | (Amounts in thousands) |
United States |  | $ | 17,569 |  | $ | 17,033 |  | $ | 65,851 |
Foreign |  |  | 44,675 |  |  | 65,894 |  |  | 71,317 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | 62,244 |  | $ | 82,927 |  | $ | 137,168 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Components of income tax expense |
|  | Fiscal Years Ended June 30, |
|  | 2015 |  | 2014 |  | 2013 |
|  | (Amounts in thousands) |
Current: |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 22,418 |  | $ | (3,663 | ) | $ | 30,061 |
State |  |  | (36 | ) |  | 334 |  |  | 368 |
Foreign |  |  | 14,835 |  |  | 30,950 |  |  | 44,749 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | 37,217 |  | $ | 27,621 |  | $ | 75,178 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred and others: |  |  |  |  |  |  |  |  |  |
Federal |  | $ | (5,506 | ) | $ | (4,122 | ) | $ | (4,341 | )
State |  |  | (49 | ) |  | (26 | ) |  | (27 | )
Foreign |  |  | (22,096 | ) |  | (4,018 | ) |  | (7,051 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | (27,651 | ) | $ | (8,166 | ) | $ | (11,419 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total income tax expense |  | $ | 9,566 |  | $ | 19,455 |  | $ | 63,759 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of income tax expense and effective tax rate |
|  | Fiscal Years Ended June 30, |
|  | 2015 |  | 2014 |  | 2013 |
|  | (Amounts in thousands) |
Total expense computed by applying federal rates |  | $ | 21,786 |  | $ | 29,024 |  | $ | 48,009 |
State and provincial income taxes, net of federal benefit |  |  | 25 |  |  | 334 |  |  | 368 |
Excess depletion |  |  | (1,429 | ) |  | (1,114 | ) |  | (1,395 | )
Estimates for uncertain tax positions |  |  | 1,404 |  |  | (7,386 | ) |  | 1,868 |
Statutory tax attributable to non-controlling interest |  |  | (211 | ) |  | (293 | ) |  | (1,236 | )
Effect of foreign earnings |  |  | 6,536 |  |  | 1,141 |  |  | 4,223 |
Effect of foreign earnings indefinitely reinvested |  |  | (7,601 | ) |  | (1,700 | ) |  | — |
Effect of recognized loss on available-for-sale securities |  |  | — |  |  | 562 |  |  | 4,239 |
Canadian rate adjustment |  |  | 4,070 |  |  | — |  |  | — |
Chilean tax reform |  |  | (2,481 | ) |  | — |  |  | — |
Unrealized foreign exchange gains |  |  | (10,949 | ) |  | (367 | ) |  | 1,146 |
Changes in estimates and corrected errors of prior year tax |  |  | (359 | ) |  | (594 | ) |  | 4,979 |
Other |  |  | (1,225 | ) |  | (152 | ) |  | 1,558 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | 9,566 |  | $ | 19,455 |  | $ | 63,759 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of deferred tax assets and liabilities |
|  | 2015 |  | 2014 |
|  | (Amounts in thousands) |
Deferred tax assets: |  |  |  |  |  |  |
Stock-based compensation |  | $ | 4,393 |  | $ | 3,511 |
Net operating losses |  |  | 16,087 |  |  | 19,322 |
Other |  |  | 3,904 |  |  | 7,068 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total deferred tax assets |  |  | 24,384 |  |  | 29,901 |
Valuation allowance |  |  | (4,262 | ) |  | (4,933 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net deferred tax assets |  | $ | 20,122 |  | $ | 24,968 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred tax liabilities: |  |  |  |  |  |  |
Mineral property basis |  | $ | (133,646 | ) | $ | (158,301 | )
Unrealized foreign exchange gains |  |  | 936 |  |  | (3,072 | )
2019 Notes |  |  | (16,384 | ) |  | (20,002 | )
Other |  |  | (1,658 | ) |  | (2,239 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total deferred tax liabilities |  |  | (150,752 | ) |  | (183,614 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total net deferred taxes |  | $ | (130,630 | ) | $ | (158,646 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Reconciliation of beginning and ending amount of gross unrecognized tax benefit |
|  | 2015 |  | 2014 |  | 2013 |
|  | (Amounts in thousands) |
Total gross unrecognized tax benefits at beginning of year |  | $ | 13,725 |  | $ | 21,166 |  | $ | 19,469 |
Additions / Reductions for tax positions of current year |  |  | 1,662 |  |  | (1,052 | ) |  | 2,638 |
Reductions due to settlements with taxing authorities |  |  | (257 | ) |  | (296 | ) |  | (941 | )
Reductions due to lapse of statute of limitations |  |  | — |  |  | (6,093 | ) |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total amount of gross unrecognized tax benefits at end of year |  | $ | 15,130 |  | $ | 13,725 |  | $ | 21,166 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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