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Commitments and Contingencies (Detail Textuals) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2012 PRPs	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Commitments And Contingencies [Line Items]
Operating leases, rent expense		$ 8,453	$ 7,715	$ 8,131
Number of potentially responsible parties | PRPs	140
Term of employment and severance agreement		up to 15 months
Current and long-term liabilities
Commitments And Contingencies [Line Items]
Accrual for environmental loss contingencies payments		$ 6,833	$ 7,211

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- Definition

Represents commitments and contingencies.

+ References

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Represents number of parties.

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Term of employment and severance agreement.

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- Definition

Amount of cash outflow to settle environmental loss contingencies.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.Y.Q1)
-URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 17
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3367-108585

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717

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