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Supplemental Cash Flow Disclosures - Additional Information (Details) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Debt Instrument [Line Items]
Cash paid during the period for interest	$ 115,117,000	$ 72,058,000	$ 34,658,000
Cash paid relating to one-time gain on reorganization	26,800,000
Senior Notes 2026 | Senior Notes
Debt Instrument [Line Items]
Cash paid during the period for interest	$ 41,900,000	$ 0	$ 0

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- Definition

Cash Paid Relating To Gain (Loss) On Internal Reorganization, Tax

+ References

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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

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- Definition

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586

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