BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investments in Affiliates (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]
Equity losses			$ (1,829)	$ (8,975)	$ (11,623)
Other than temporary impairment			(12,954)	(4,654)	0
Total losses			(14,783)	(13,629)	(11,623)
Empire Education Group Inc
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]
Equity losses			(1,832)	(8,958)	(14,701)
Other than temporary impairment	$ (12,954)	$ (4,654)	(12,954)	(4,654)	0
Total losses			$ (14,786)	(13,612)	(14,701)
Investments in and Advances to Affiliates [Line Items]
Non-cash deferred tax asset valuation allowance				$ 6,900
Non-cash impairment charges for goodwill and long-lived intangible assets					$ 21,200