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FAIR VALUE MEASUREMENTS - Additional Information (Detail) - USD ($) $ in Millions | Sep. 30, 2018 | Jun. 30, 2018 | Sep. 30, 2017
--- | --- | --- | ---
Accrued Liabilities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred Acquisition Obligations | $ 4.2 | $ 4.3 | $ 6.9
Deferred Rent and Other Liabilities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred Acquisition Obligations | $ 13.7 | $ 14.3 | $ 12.7

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