BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Variable Interest Entities (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2018 USD ($) member VIE	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Variable interest entities
Total assets	$ 856,735	$ 1,011,488
Total liabilities	353,243	503,267
Total shareholders' equity	$ 503,492	508,221	$ 519,401	$ 627,444
Empire Education Group Inc
Variable interest entities
Ownership percentage in equity method investee	51.00%
Number of members appointed to board of directors by investee | member	4
Number of board of directors members | member	5
Roosters
Variable interest entities
Number of variable interest entities | VIE	1
Ownership interest percentage	84.00%
Total assets	$ 8,300
Total liabilities	600
Total shareholders' equity	7,700
Net income attributable to noncontrolling interest	0	0	$ 0
Shareholders' equity attributable to the noncontrolling interest	$ 1,000	$ 900