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Deposits (Note)
12 Months Ended
Dec. 31, 2020
Deposits [Abstract]  
Deposits
5.Deposits and prepaid health insurance
Deposits and prepaid health insurance consisted of the following:
December 31,
(in thousands)20202019
Prepaid health insurance$9,000 $9,000 
Deposits – health insurance7,900 8,100 
Deposits – workers’ compensation186,331 175,913 
Deposits and prepaid health insurance$203,231 $193,013 

The contractual arrangement with United for health insurance coverage requires us to maintain an accumulated cash surplus in the plan of $9.0 million, which is reported as deposits and prepaid health insurance. Please read Note 1, “Accounting Policies,” for a discussion of our accounting policies for health insurance costs and workers’ compensation costs.