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Commitments and Contingencies - Narrative (Details)	12 Months Ended
	Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Payments for general liability per occurrence	$ 100,000
Claim amounts that affect ultimate liability	350,000
Maximum liability	4,000,000
Minimum
Loss Contingencies [Line Items]
Payments for workers compensation per occurrence	1,600
Maximum
Loss Contingencies [Line Items]
Payments for workers compensation per occurrence	$ 250,000

X

- Definition

General Liability And Workers Compensation Claim Per Occurrence That Would Affect Ultimate Liability

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No definition available.

+ Details

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X

- Definition

Represents self insurance general liability, amount per occurrence.

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No definition available.

+ Details

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X

- Definition

Represents self insurance workers compensation claims, amount per occurrence.

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No definition available.

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X

- Definition

Represents self insurance workers compensation claims, maximum liability

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No definition available.

+ 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.

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No definition available.

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