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Employee Stock Ownership Plan - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |
Initial term of employer loan |  | 15 years |
Employer loan, annual interest rate | 2.50% |  |
Compensation Expense | $ 2.5 | $ 3.4 | $ 4.4
Difference between cost and market value of committed to be released shares | $ 0.5 | $ 0.0 | $ 1.0

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- Definition Employee Stock Ownership Plan (ESOP), Debt Structure, Employer Loan, Interest Rate During Period + References No definition available. + Details
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- Definition Employee Stock Ownership Plan (ESOP), Debt Structure, Employer Loan, Term + References No definition available. + Details
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- References No definition available. + Details
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- Definition The amount of plan compensation cost recognized during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65895303&loc=d3e17540-113929 + Details
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- Definition The difference between cost and fair value added or subtracted from paid-in capital, arising from contribution of shares to an ESOP or commitments-to-release ESOP shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 30 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65884501&loc=d3e17042-113922 + Details
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