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Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2016	Jun. 30, 2016
Goodwill [Line Items]
Gross Carrying Amount	$ 57,186	$ 57,310
Accumulated Amortization	(46,670)	(45,607)
Total other intangible assets, net	10,516	11,703
Franchise Rights [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 1,296	1,339
Estimated Useful Life (in years)	5 years
Weighted Average Remaining Useful Life (in years)	2 years 10 months
Dealer Relationship [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 29,697	29,773
Weighted Average Remaining Useful Life (in years)	12 years 10 months 3 days
Patents [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 1,386	1,386
Estimated Useful Life (in years)	12 years
Weighted Average Remaining Useful Life (in years)	1 year 7 months 20 days
Trade Names [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 24,667	24,667
Estimated Useful Life (in years)	15 years
Weighted Average Remaining Useful Life (in years)	4 years 8 months 23 days
Noncompete Agreements [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 50	52
Estimated Useful Life (in years)	10 years
Weighted Average Remaining Useful Life (in years)	7 years 9 months 23 days
Order or Production Backlog [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 90	$ 93
Estimated Useful Life (in years)	3 months 22 days
Weighted Average Remaining Useful Life (in years)	1 day
Minimum [Member] | Dealer Relationship [Member]
Goodwill [Line Items]
Estimated Useful Life (in years)	8 years
Maximum [Member] | Dealer Relationship [Member]
Goodwill [Line Items]
Estimated Useful Life (in years)	15 years

X

- Definition

Finite-Lived Intangible Asset, Weighted Average Remaining Useful Life (in years)

+ References

No definition available.

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+ References

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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