FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2019 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Realized net gain to earnings from AOCI | $ 371,800 | $ 30,500 |
| Investment security, interest income | 1,000,000.0 | 2,700,000 |
| Level 2 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Debt | $ 655,000,000.0 | $ 497,500,000 |