Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) - USD ($)
 3 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Income Taxes [Line Items]    
Liability unrecognized tax benefits $ 0 $ 0
Latest Tax Year [Member] | Federal Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2014  
Latest Tax Year [Member] | State Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2014  
Latest Tax Year [Member] | International Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2014  
Earliest Tax Year [Member] | Federal Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2013  
Earliest Tax Year [Member] | State Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2010  
Earliest Tax Year [Member] | International Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2012