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Accounts and Notes Receivable - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Dec. 31, 2015
Mar. 31, 2015
Receivables [Abstract]      
Allowance for doubtful accounts   $ 9.2 $ 7.1
Increased allowance for doubtful accounts $ 2.0    
Notes receivable, total   3.2  
Notes receivable, current   $ 0.5  
Notes receivable interest rate   3.50%  
Notes receivable, maturity year   2017