FAIR VALUE MEASUREMENTS (Assets Measured at Fair Value on Recurring Basis) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities and Investments	$ 8,402	$ 4,255	$ 4,139
Institutional Loans Receivable, Net	41,794	44,320	39,402
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	408,765	430,690	273,102
Marketable Securities and Investments	8,402	4,255	4,139
Institutional Loans Receivable, Net	0	0	0
Deferred Acquisition Obligations	0	0	0
FIES Receivable			0
Total Financial Assets at Fair Value	417,167	434,945	277,241
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0	0	0
Marketable Securities and Investments	0	0	0
Institutional Loans Receivable, Net	41,794	44,320	39,402
Deferred Acquisition Obligations	17,949	18,585	19,611
FIES Receivable			16,707
Total Financial Assets at Fair Value	59,743	62,905	75,720
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents	0	0	0
Marketable Securities and Investments	0	0	0
Institutional Loans Receivable, Net	0	0	0
Deferred Acquisition Obligations	0	0	0
FIES Receivable			0
Total Financial Assets at Fair Value	$ 0	$ 0	$ 0