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Commitments and Contingencies - Insurance (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Commitment And Contingencies [Line Items]
Insurance and other non-current liabilities	$ 391,221	$ 311,307
Insurance Settlements Receivable, Noncurrent	35,164	34,785
Employer's Liability, Workers' Compensation, Auto Liability, General Liability and Group Health Care Claims
Commitment And Contingencies [Line Items]
Gross amount accrued for insurance claims	319,500	287,600
Insurance and other non-current liabilities	238,000	212,900
Related insurance recoveries/receivables	35,600	35,100
Related insurance recoveries/receivables included in prepaid expenses and other current assets	400	300
Insurance Settlements Receivable, Noncurrent	$ 35,200	$ 34,800

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- Definition

Commitment And Contingencies [Line Items]

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Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.

+ References

No definition available.

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- Definition

Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Carrying amount due after one year of the balance sheet date (or one operating cycle, if longer) of amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
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Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

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