Summary of Goodwill - Additional Information (Detail) $ in Millions |
Dec. 31, 2017
USD ($)
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| Level 1 | |
| Goodwill [Line Items] | |
| Goodwill impairment | $ 10.7 |
| X | ||||||||||
- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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