Accounts Receivable, Net of Allowance for Doubtful Accounts - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Other selling, general and administrative | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Bad debt expense | $ 0.5 | $ 1.5 | $ 1.3 |
| X | ||||||||||
- Definition Bad debt expenses. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Details
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