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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Activity in Reserve for Losses for Insurance Captive [Roll Forward]      
Balance at the beginning of the year $ 12,345 $ 12,470  
Incurred, Current Year 2,911 3,480  
Incurred, Prior Years (1,962) (470)  
Insurance Captive Accrual 949 3,010  
Paid, Current Year (141) (500)  
Paid, Prior Years (2,193) (2,635)  
Insurance Captive Paid (2,334) (3,135)  
Balance at the end of the year 10,960 12,345 $ 12,470
Fines $ 0 $ 0 $ 0