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Schedule II
12 Months Ended
Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts
SCHEDULE II

Valuation and Qualifying Accounts

Activities in our allowance accounts for the years ended December 31, 2021, 2020 and 2019 were as follows (in thousands):

Doubtful Accounts
Balance at Beginning of PeriodCharged to Costs and ExpensesDeductionsOther*Balance at End of Period
2019$6,233 3,000 — 2,345 $11,578 
2020$11,578 5,244 — 1,555 $18,377 
2021$18,377 (6,022)— 112 $12,467 

*    Other represents doubtful account reserves released or recorded as part of net revenues for estimated customer disallowances.

Deferred Tax Asset Valuation
Balance at Beginning of PeriodCharged to Costs and ExpensesDeductionsOtherBalance at End of Period
2019$1,537 291 — — $1,828 
2020$1,828 143 — — $1,971 
2021$1,971 37 — — $2,008