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Schedule II - Valuation and Qualifying Accounts and Reserves
 12 Months Ended
Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts and Reserves
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
OTTER TAIL CORPORATION
Below is a summary of activity within valuation and qualifying accounts for the years ended December 31, 2021, 2020 and 2019:
(in thousands)Balance, January 1Charged to Cost and Expenses
Deductions 1, 2
Balance, December 31
Allowance for Credit Losses
2021$3,215 $93 $(1,472)$1,836 
20201,339 3,138 (1,262)3,215 
20191,407 986 (1,054)1,339 
Deferred Tax Asset Valuation Allowance
2021$800 $— $(800)— 
2020800 — — 800 
2019600 200 — 800 
1Amounts under Allowance for Credit Losses reflect deductions to the allowance for amounts written-off, net of recoveries.
2Amounts under Deferred Tax Asset Valuation Allowance reflect a release of a valuation allowance based on current expectations of the realizability of the associated deferred tax asset.