Annual report pursuant to Section 13 and 15(d)

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

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Accounts Receivable, Net of Allowance for Doubtful Accounts - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Other selling, general and administrative      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Write-offs and other adjustments $ 1.5 $ 1.3 $ 0.4