Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2021	Jun. 30, 2020
Goodwill [Line Items]
Gross carrying amount	$ 188,133	$ 139,994
Less: Accumulated amortization	(68,840)	(63,602)
Total definite-lived intangible assets, net	119,293	76,392
Total other intangible assets, net	237,493	139,892
Trade name
Goodwill [Line Items]
Trade name	118,200	63,500
Dealer relationships
Goodwill [Line Items]
Gross carrying amount	$ 159,426	111,293
Weighted Average Remaining Useful Life (in years)	17 years 9 months 18 days
Dealer relationships | Minimum
Goodwill [Line Items]
Estimated Useful Life (in years)	8 years
Dealer relationships | Maximum
Goodwill [Line Items]
Estimated Useful Life (in years)	20 years
Patent
Goodwill [Line Items]
Gross carrying amount	$ 3,986	3,986
Weighted Average Remaining Useful Life (in years)	11 years 3 months 18 days
Patent | Minimum
Goodwill [Line Items]
Estimated Useful Life (in years)	12 years
Patent | Maximum
Goodwill [Line Items]
Estimated Useful Life (in years)	15 years
Trade name
Goodwill [Line Items]
Gross carrying amount	$ 24,667	24,667
Estimated Useful Life (in years)	15 years
Weighted Average Remaining Useful Life (in years)	1 year 2 months 12 days
Non-compete agreement
Goodwill [Line Items]
Gross carrying amount	$ 54	$ 48
Estimated Useful Life (in years)	10 years
Weighted Average Remaining Useful Life (in years)	3 years 7 months 6 days