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Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]        
Balance at Beginning of Year $ 4,323 $ 2,748 $ 14,410  
Changes Charged to Statement of Income Accounts 1,718   1,575 $ 2,257
Write Offs (net of recoveries) 0 0 (13,919)  
Balance at End of Year $ 6,041 $ 4,323 $ 2,748 $ 14,410