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Acquisition - Intangible Assets Acquired (Details) - USD ($) $ in Thousands	Jul. 06, 2017	Sep. 30, 2018	Jun. 30, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Definite-lived intangibles	$ 58,900
Indefinite-lived intangible	31,000
Total intangible assets	89,900	$ 92,888	$ 94,221
Dealer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Definite-lived intangibles	$ 56,300
Useful Life (in years)	20 years
Patent
Acquired Finite-Lived Intangible Assets [Line Items]
Definite-lived intangibles	$ 2,600
Useful Life (in years)	15 years

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

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