v3.2.0.727
Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis - Additional Information (Detail) - USD ($)
$ in Millions
Jun. 30, 2015
Jun. 30, 2014
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]    
MMDA account balances [1] $ 65.5 $ 138.9
MMDA Account [Member]    
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]    
MMDA account balances $ 34.0 $ 71.6
[1] Money market funds include MMDA account balances of $34.0 million and $71.6 million as of June 30, 2015 and 2014, respectively.