FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016
Securitized Beneficial Interests
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Fair value, assets measured on recurring basis, change in unrealized gain (loss) included in other income	$ 340	$ 458	$ 1,722
Securitized Beneficial Interests
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 10 percent adverse change in other assumption	29
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 20 percent adverse change in other assumption	57
Guarantees
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 10 percent adverse change in other assumption	881
Sensitivity analysis of fair value, transferor's interests in transferred financial assets, impact of 20 percent adverse change in other assumption	$ 1,743