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Other Long-Term Liabilities - Components (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Other long-term liabilities    
Sale-leaseback arrangement $ 16,712 $ 17,447
Accrual for insurance claims liabilities 2,818 2,528
Deferred rent 307 461
Total other long-term liabilities $ 19,837 $ 20,436