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Provision for Income Taxes (Schedule of Effective Income Tax Rates) (Details)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Income tax rate reconciliation
U.S. federal statutory income tax rate	28.10%	34.00%
Increase (reduction) in rate resulting from:
State franchise tax, net of federal income tax benefit	(0.10%)	0.10%
ESOP cost versus Fair Market Value	1.10%	3.60%
Dividend on allocated ESOP shares	(2.90%)	(7.20%)
Qualified production activities	(2.10%)	(2.80%)
Stock-based compensation	0.10%	1.80%
Other	0.20%	1.70%
Effective tax rate	24.40%	31.20%

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to differences in ESOP fair value.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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