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Fair Value Disclosure - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Prepaid expenses and other assets $ 147,055,000   $ 147,055,000   $ 109,795,000
Impairment of non-marketable equity securities 0 $ 0 0 $ 0  
Fair Value, Measurements, Recurring | Level 2          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair value of debt outstanding 23,300,000   23,300,000   23,600,000
Cash          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Prepaid expenses and other assets $ 12,700,000   $ 12,700,000   $ 11,700,000