Commitments and Contingencies (Self-Insurance) (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Commitments and Contingencies Disclosure [Abstract] | ||
| Coverage limit per incident | $ 750,000 | |
| Self insurance reserve | 4,800,000 | $ 4,000,000 |
| Workers compensation self insurance coverage limit per incident | 500,000 | |
| Workers compensation self insurance reserve | $ 3,200,000 | $ 2,900,000 |
| X | ||||||||||
- Definition Self Insurance, Health Care, Coverage Floor Per Incident 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, arising from healthcare related claims. No definition available.
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| X | ||||||||||
- Definition Workers Compensation, Coverage Floor Per Incident No definition available.
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| X | ||||||||||
- References 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://www.xbrl.org/2003/role/presentationRef
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