Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Jun. 30, 2016
Goodwill [Line Items]
Gross Carrying Amount	$ 57,410	$ 57,310
Accumulated Amortization	(46,179)	(45,607)
Total other intangible assets, net	11,231	11,703
Franchise Rights [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 1,374	1,339
Estimated Useful Life (in years)	5 years
Weighted Average Remaining Useful Life (in years)	3 years 23 days
Dealer Relationship [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 29,835	29,773
Weighted Average Remaining Useful Life (in years)	13 years 23 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 9 months 29 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 10 months 29 days
Noncompete Agreements [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 53	52
Estimated Useful Life (in years)	10 years
Weighted Average Remaining Useful Life (in years)	8 years 23 days
Order or Production Backlog [Member]
Goodwill [Line Items]
Gross Carrying Amount	$ 95	$ 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