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Schedule II Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II Valuation and Qualifying Accounts
Schedule II Valuation and Qualifying Accounts
 
  Additions    
Balance at
beginning of
period		Charged to
costs and
expenses		Charged to
other
accounts		DeductionsBalance at
end of
period
Year Ended December 31, 2019:       
Allowance for doubtful accounts$1,854  $3,220  $1,090  $231  (1) $5,933  
Year Ended December 31, 2018:      
Allowance for doubtful accounts$5,262  $338  $(523) $3,223  (1) $1,854  
Year Ended December 31, 2017:      
Allowance for doubtful accounts$5,164  $765  $(537) $130  (1) $5,262  
Notes:
 
Schedule above has been recast from prior year to exclude activity related to discontinued operations.
 
(1)Write-offs, net of recoveries.