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Commitments and Contingencies - Additional Information (Detail)
$ in Millions
1 Months Ended 2 Months Ended 3 Months Ended 10 Months Ended
Dec. 31, 2010
USD ($)
Mar. 31, 2010
USD ($)
Jan. 31, 2011
USD ($)
Assessment
Jun. 30, 2015
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2014
USD ($)
Commitments And Contingencies [Line Items]            
Court deposit           $ 3.1
Brazil [Member]            
Commitments And Contingencies [Line Items]            
Tax assessment settled with payments $ 3.9 $ 12.2        
Amount of interest, penalties and monetary restatement fees on tax assessments         $ 7.8  
Tax credits certified       $ 8.3    
Number of additional assessments | Assessment     2      
Value of assessments served on Brazilian subsidiary     $ 13.0      
Brazil [Member] | Inflation Related Credits [Member]            
Commitments And Contingencies [Line Items]            
Tax credits certified       $ 2.3