INCOME TAXES - Reconciliation of Statutory Rate (Details)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Difference between the statutory and the effective federal tax rate
Statutory income tax rate	35.00%	35.00%	34.00%
State taxes (net of federal income tax benefit and valuation allowance)	2.83%	0.41%	2.73%
Valuation allowance		0.06%	0.30%
Tax credits	(0.62%)	(2.82%)
Other	0.04%	(0.21%)	(2.95%)
Uncertain tax positions	1.93%	6.06%	(0.55%)
Permanent deductions	(1.72%)
Permanent differences		6.36%	20.84%
Effective income tax rate	37.46%	44.86%	54.37%