Summary of Significant Accounting Policies - Schedule of Partial Self Insurance Reserve (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Self Insurance [Abstract] | ||
| Balance, beginning of period | $ 747 | $ 783 |
| Self-funded costs | 9,336 | 9,735 |
| Claims paid | (9,255) | (9,771) |
| Ending period balance | $ 828 | $ 747 |
| X | ||||||||||
- Definition Self funded costs. No definition available.
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| X | ||||||||||
- Definition Self Insurance [Abstract] No definition available.
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| X | ||||||||||
- Definition Self insurance reserve claims paid. No definition available.
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| X | ||||||||||
- Definition Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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