Supplemental Financial Statement Information - Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accrued and Other Liabilities
Insurance reserves	$ 277,011	$ 269,849
Legal accruals	250,502	226,408
Ride-related accruals	225,420	196,439
Long-term debt, current	37,567	35,760
Insurance claims payable and related fees	31,994	28,318
Other	215,875	197,234
Accrued and other current liabilities	$ 1,038,369	$ 954,008

Insurance Claims Payable And Related Fees, Current

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Carrying value as of the balance sheet date of liabilities reflecting estimated ultimate cost for claims incurred but not paid and claims that have been incurred but not yet reported and any estimable administrative run-out expenses related to the processing of these outstanding claim payments.

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Ride-Related Accrued Liabilities, Current

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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