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Schedule II - Consolidated Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Consolidated Valuation and Qualifying Accounts
SCHEDULE II - CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS

Additions
Description (in thousands)
Balance at beginning of periodCharged to costs and expensesCharged to other accounts
Deductions (1)
Balance at end of period
Allowance for doubtful accounts receivable
2020$12,781 $7,042 $ $(4,349)$15,474 
20198,325 4,678 — (222)12,781 
20189,156 542 — (1,373)8,325 
(1) Uncollectible accounts written off, net of recoveries and adjustments to estimates for the allowance for doubtful accounts receivable accounts.