Note 15. Variable Interest Entities -Textuals (Details) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2019	Jun. 30, 2018
Variable Interest Entity
Financing Receivable, Allowance for Credit Losses	$ 261	$ 233
Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure
Variable Interest Entity
Variable Interest Entity, Obligation to Provide Additional Funding, Amount	0
Independent Dealership Financing | Notes Receivable
Variable Interest Entity
Financing Receivable, Allowance for Credit Losses	88	50
Other Assets | Cost-method Investments | Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure
Variable Interest Entity
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	500	500
Other Assets | Stock Warrant | Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure
Variable Interest Entity
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	1,500	1,500
Receivables and Other Assets | Independent Dealership Financing | Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure | Notes Receivable
Variable Interest Entity
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	1,000	600
Financing Receivable, Allowance for Credit Losses	$ 100	$ 100