Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable, Net of Allowance for Doubtful Accounts - Additional Information (Detail)

v3.8.0.1
Accounts Receivable, Net of Allowance for Doubtful Accounts - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Other selling, general and administrative        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Write-offs and other adjustments $ 0.1 $ 0.1 $ 0.5 $ 0.6