Debt (Textuals) (Details) - USD ($) $ in Thousands	9 Months Ended
Mar. 31, 2021	Jun. 30, 2020
Long-term Debt Instruments [Line Items]
Letters of Credit Outstanding, Amount	$ 4,548	$ 4,475
Revolving Credit Facility [Member]
Long-term Debt Instruments [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	250,000
Letters of Credit Outstanding, Amount	200	1,873
Line of Credit Facility, Remaining Borrowing Capacity	$ 249,800	$ 248,127
Revolving Credit Facility [Member] \| Minimum [Member]
Long-term Debt Instruments [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.10%
Revolving Credit Facility [Member] \| Maximum [Member]
Long-term Debt Instruments [Line Items]
Line of Credit Facility, Commitment Fee Percentage	0.20%
Long-term Debt [Member]
Long-term Debt Instruments [Line Items]
Debt Instrument, Face Amount	$ 780,000
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.88%	1.94%
Long-term Debt	$ 560,000	$ 589,250
Asset-backed Securities, Securitized Loans and Receivables [Member]
Long-term Debt Instruments [Line Items]
Debt Instrument, Face Amount	$ 250,000
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.30%	1.07%
Debt Instrument, Interest Rate, Stated Percentage	0.98%
Prudential Facility [Domain]
Long-term Debt Instruments [Line Items]
Long-term Debt	$ 130,000	$ 170,000
Prudential Facility [Domain] \| Minimum [Member]
Long-term Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.25%
Prudential Facility [Domain] \| Maximum [Member]
Long-term Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.25%
Prudential Facility - Series C [Member]
Long-term Debt Instruments [Line Items]
Debt Instrument, Face Amount		120,000
Long-term Debt	$ 80,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.19%
Repayments of Debt	$ 40,000
Prudential Facility - Series D [Member]
Long-term Debt Instruments [Line Items]
Long-term Debt	$ 25,000	25,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.21%
Prudential Facility - Series E [Member] [Member]
Long-term Debt Instruments [Line Items]
Long-term Debt	$ 25,000	25,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.08%
State of Ohio Assumed Debt [Member]
Long-term Debt Instruments [Line Items]
Debt Instrument, Face Amount	$ 2,359
Long-term Debt	$ 906	$ 1,026
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	1.50%

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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- Definition

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

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Balance Type:	na
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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Balance Type:	credit
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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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.

+ References

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Balance Type:	na
Period Type:	instant

- Definition

+ References

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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-Paragraph 15
-Subparagraph (b)
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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	duration

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