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Schedule II - Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts
Schedule II—Valuation and Qualifying Accounts
(amounts in thousands)
 

Description
Balance At
Beginning
of Year
Additions
Charged
Against
Operations
Uncollectible
Accounts
Written-Off
Balance
at End of
Year
Year ended December 31, 2018
Allowance for doubtful accounts$1,607 $(811)$(289)$507