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INCOME TAXES: Additional Information (Details) $ in Millions | 12 Months Ended
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Jun. 30, 2018 USD ($)
Income Tax Disclosure [Abstract] |
Provisional net tax benefit | $ 68.1

X
- Definition Amount of reasonable estimate for income tax expense (benefit) from effect of Tax Cuts and Jobs Act of 2017 for which accounting for tax effect is incomplete. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration