Leases - Components of Lease Costs (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
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| Finance lease cost: | ||
| Amortization of lease assets | $ 244 | $ 202 |
| Interest on lease liabilities | 27 | 17 |
| Operating lease cost | 27,776 | 29,737 |
| Short-term lease cost | 157,899 | 170,365 |
| Total lease cost | $ 185,946 | $ 200,321 |
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- Definition Finance Leases, Cost [Abstract] No definition available.
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- Definition Short-Term Lease And Variable Lease, Cost No definition available.
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- Definition Amount of interest expense on finance lease liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of amortization expense attributable to right-of-use asset from finance lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of lease cost recognized by lessee for lease contract. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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