COMMITMENTS AND CONTINGENCIES - ADDITIONAL INFORMATION (Details)	3 Months Ended
	Sep. 30, 2017 audit taxable_jurisdiction
Loss Contingencies [Line Items]
Number of Taxable Jurisdictions | taxable_jurisdiction	140
Minimum
Loss Contingencies [Line Items]
Number of Audits Typically Underway	50
Maximum
Loss Contingencies [Line Items]
Number of Audits Typically Underway	60