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Estimated Credit Losses (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning Balance $ 5,992 $ 5,610
Adjustment due to the adoption of Topic 326 289 0
Provision for credit losses 13 (123)
Write-off of uncollectible amounts, net of recoveries (154) (13)
Ending Balance $ 6,140 $ 5,474