Income Tax	3 Months Ended
Sep. 30, 2013
Income Tax [Abstract]
Income Tax	15. Income tax Income tax in interim periods For the purposes of interim financial reporting, the Company determines the appropriate income tax provision by first applying the effective tax rate expected to be applicable for the full fiscal year to ordinary income. This amount is then adjusted for the tax effect of significant unusual or extraordinary items, for instance, changes in tax law, valuation allowances and non-deductible transaction-related expenses that are reported separately, and have an impact on the tax charge. The cumulative effect of any change in the enacted tax rate, if and when applicable, on the opening balance of deferred tax assets and liabilities is also included in the tax charge as a discrete event in the interim period in which the enactment date occurs. For the three months ended September 30, 2013, the tax charge was calculated using the expected effective tax rate for the year. The Company's effective tax rate for each of the three months ended September 30, 2013 and 2012, respectively, was 36% and was higher than the South African statutory rate as a result of non-deductible expenses (including interest expense related to the Company's long-term Korean borrowings and stock-based compensation charges). Uncertain tax positions There were no changes during the three months ended September 30, 2013. As of September 30, 2013, the Company had accrued interest related to uncertain tax positions of approximately $0.2 million on its balance sheet. The Company does not expect changes related to its unrecognized tax benefits will have a significant impact on its results of operations or financial position in the next 12 months. The Company files income tax returns mainly in South Africa, Korea, Austria, Botswana, the Russian Federation and in the US federal jurisdiction. As of September 30, 2013, the Company is no longer subject to any new income tax examination by the South African Revenue Service for years before June 30, 2009. In 2011, the Korea National Tax Service had completed the examination of the Company's returns in Korea related to years 2006 through 2010. The Company is subject to income tax in other jurisdictions outside South Africa and Korea, none of which are individually material to its financial position, cash flows, or results of operations.

15. Income tax

Income tax in interim periods

For the purposes of interim financial reporting, the Company determines the appropriate income tax provision by first applying the effective tax rate expected to be applicable for the full fiscal year to ordinary income. This amount is then adjusted for the tax effect of significant unusual or extraordinary items, for instance, changes in tax law, valuation allowances and non-deductible transaction-related expenses that are reported separately, and have an impact on the tax charge. The cumulative effect of any change in the enacted tax rate, if and when applicable, on the opening balance of deferred tax assets and liabilities is also included in the tax charge as a discrete event in the interim period in which the enactment date occurs.

For the three months ended September 30, 2013, the tax charge was calculated using the expected effective tax rate for the year. The Company's effective tax rate for each of the three months ended September 30, 2013 and 2012, respectively, was 36% and was higher than the South African statutory rate as a result of non-deductible expenses (including interest expense related to the Company's long-term Korean borrowings and stock-based compensation charges).

Uncertain tax positions

There were no changes during the three months ended September 30, 2013. As of September 30, 2013, the Company had accrued interest related to uncertain tax positions of approximately $0.2 million on its balance sheet.

The Company does not expect changes related to its unrecognized tax benefits will have a significant impact on its results of operations or financial position in the next 12 months.

The Company files income tax returns mainly in South Africa, Korea, Austria, Botswana, the Russian Federation and in the US federal jurisdiction. As of September 30, 2013, the Company is no longer subject to any new income tax examination by the South African Revenue Service for years before June 30, 2009. In 2011, the Korea National Tax Service had completed the examination of the Company's returns in Korea related to years 2006 through 2010. The Company is subject to income tax in other jurisdictions outside South Africa and Korea, none of which are individually material to its financial position, cash flows, or results of operations.