Income Taxes - Reconciliation to Fedreal Statutory Rate (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory tax rate	35.00%	35.00%	34.00%
Income tax benefit at statutory rate	$ 14,121	$ 3,472	$ 358
State income tax (net of federal tax benefit)	1,819	557	260
Dividend income exclusion	(134)	(140)	(54)
Valuation allowance	(13)	(83,230)	(185)
Change in tax rate	0	(1,061)	0
Retiree life insurance	(69)	135	0
Change in contingency reserve (net)	1	0	0
Other (net)	229	270	23
Income tax (benefit) expense	$ 15,954	$ (79,997)	$ 402

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

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.

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