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Schedule II Valuation and Qualifying Accounts and Reserves (Details) - SEC Schedule, 12-09, Allowance, Credit Loss - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year $ 614 $ 533 $ 534
Recoveries added to allowance 530 758 649
Bad debt expense 1,028 1,220 1,743
Write-offs (1,820) (1,897) (2,393)
Balance at End of Year $ 352 $ 614 $ 533