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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
(in thousands)
Balance at
Beginning of
Period		Charged to
Expenses		DeductionsTranslation
Adjustments		Balance at
End of Period
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 
Year Ended December 31, 2020
Allowance for credit losses$23,443 (b)4,200 (7,906)(120)$19,617 
Deferred tax valuation allowance$21,618 3,462 (2,333)1,385 $24,132 
 
(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.
(b)In accordance with its adoption of ASC 326 Current Expected Credit Losses Model, on January 1, 2020, the Company established allowances based on expected losses due to credit risk of its customers.