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Schedule of Committed Credit Facilities Additional Information (Detail) | 12 Months Ended | 24 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2017
Uncommitted Credit Facility [Member] | Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Line of Credit Facility, Interest Rate During Period |  | 0.75%
Uncommitted Credit Facility [Member] | Maximum |  |
Line of Credit Facility [Line Items] |  |
Line of Credit Facility, Interest Rate During Period |  | 5.25%
Bank Overdrafts [Member] | Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Line of Credit Facility, Interest Rate During Period | 3.10% |
Bank Overdrafts [Member] | Maximum |  |
Line of Credit Facility [Line Items] |  |
Line of Credit Facility, Interest Rate During Period | 3.18% |
Revolving Credit Facility Maturing 2018 |  |
Line of Credit Facility [Line Items] |  |
Debt Instrument, Basis Spread on Variable Rate | 2.00% |

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition The effective interest rate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- 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. + References No definition available. + Details
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- Details
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- Details
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