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FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Detail) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Jun. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Unrealized gain (loss), realized and reclassified to earnings from AOCI $ 0   $ 0 $ 400,000  
Investment security, interest income   $ 200,000   $ 1,000,000.0  
Fair value of marketable securities, continuous unrealized losses 1,133,000   1,133,000   $ 0
Level 2          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Debt $ 575,000,000.0   $ 575,000,000.0   $ 655,000,000.0