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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
(in thousands)
Balance at
Beginning of
Period		Charged to
Expenses		DeductionsTranslation
Adjustments		Balance at
End of Period
Year Ended December 31, 2017
Allowance for doubtful accounts receivable$33,133  8,022  (8,751) 777  $33,181  
Deferred tax valuation allowance$18,907  1,411  (1,275) 1,135  $20,178  
Year Ended December 31, 2018
Allowance for doubtful accounts receivable$23,682  (a)11,914  (8,690) 772  $27,678  
Deferred tax valuation allowance$20,178  5,683  (2,599) (190) $23,072  
Year Ended December 31, 2019
Allowance for doubtful accounts receivable$27,678  9,868  (8,687) (103) $28,756  
Deferred tax valuation allowance$23,072  719  (2,154) (19) $21,618  
 
(a)In accordance with its adoption of ASC 606 Revenue from Contracts with Customers, on January 1, 2018, the Company reclassified certain allowances that are now reflected as liabilities in the amount of $9.5 million.