Debt Textuals (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	$ 2,698
Debt Issuance Costs, Gross, Current	577	$ 551
Debt Issuance Cost, Gross, Noncurrent	1,366	1,807
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility unsecured borrowings amount	250,000
Long-term Debt		19,500
Letters of Credit Outstanding, Amount	3,215	3,625
Line of Credit Facility, Remaining Borrowing Capacity	$ 246,785	$ 226,875
Debt, Weighted Average Interest Rate		3.93%
Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Fees on credit facility	0.10%
Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Fees on credit facility	0.20%
Long-term Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 780,000
Long-term Debt	$ 613,625	$ 775,125
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	4.19%	4.13%
Asset-backed Securities, Securitized Loans and Receivables [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	3.33%
Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement	$ 175,000
Debt Instrument, Interest Rate, Stated Percentage	0.90%
Prudential Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 170,000
Prudential Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.25%
Prudential Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.25%
Prudential Facility - Series C [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 120,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.19%
Prudential Facility - Series D [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 50,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.21%
State of Ohio Assumed Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 2,359
Long-term Debt	$ 1,204	$ 1,438
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	1.50%

Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Weighted average interest rate of debt outstanding.

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Amount, before accumulated amortization, of debt issuance costs classified as current. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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This is the principal amount outstanding for securitized loans only (across all types of loans).

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