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Income Taxes (Tables) | 6 Months Ended
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Dec. 31, 2016
Income Tax Disclosure [Abstract] |
Schedule of Details of Income Taxes | The following table provides details of income taxes:
| Three months ended December 31, |  | Six months ended December 31,
(Dollar amounts in thousands) | 2016 |  | 2015 |  | 2016 |  | 2015
Income before income taxes | $ | 306,845 |  |  | $ | 185,475 |  |  | $ | 529,065 |  |  | $ | 319,774 |
Provision for income taxes | $ | 68,594 |  |  | $ | 33,268 |  |  | $ | 112,713 |  |  | $ | 62,670 |
Effective tax rate | 22.4 | % |  | 17.9 | % |  | 21.3 | % |  | 19.6 | %

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