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Income Taxes - Additional Information Regarding Examinations (Detail)
3 Months Ended 12 Months Ended
Sep. 30, 2015
Mar. 31, 2011
Jun. 30, 2016
Internal Revenue Service (IRS) | Earliest Tax Year      
Income Tax Examination [Line Items]      
Tax years under audit 2007 2004  
Tax years subject to examination     2010
Internal Revenue Service (IRS) | Latest Tax Year      
Income Tax Examination [Line Items]      
Tax years under audit 2009 2006  
Tax years subject to examination     2016
Foreign Country | Earliest Tax Year      
Income Tax Examination [Line Items]      
Tax years subject to examination     1996
Foreign Country | Latest Tax Year      
Income Tax Examination [Line Items]      
Tax years subject to examination     2016