Fair Value of Financial Instruments - Recurring Fair Value Measurements (Detail) - Fair Value, Measurements, Recurring - Level 2 - Interest Rate Swap - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Other accrued expenses and current liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	$ 1,251
Other long-term liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	$ 38,861	$ 43,168