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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2018
Other Commitments [Line Items]
Actual cash expenditures	$ 1,310	$ 1,976
Scenario, Forecast [Member] | Minimum [Member]
Other Commitments [Line Items]
Actual cash expenditures			$ 8,000
Scenario, Forecast [Member] | Maximum [Member]
Other Commitments [Line Items]
Actual cash expenditures			$ 11,000

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- Definition

The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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