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Details of Certain Balance Sheet Accounts (Schedule of Prepaid Expenses and Other Current Assets) (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Details Of Certain Balance Sheet Accounts [Abstract]    
Prepaid workers' compensation and liability insurance $ 3,520 $ 3,206
Workers' compensation insurance receivable 783 1,559
Income tax receivable 737 7,556
Other 5,861 6,170
Total prepaid expenses and other current assets $ 10,901 $ 18,491