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Schedule II - Valuation and Qualifying Accounts and Reserves
 12 Months Ended
Dec. 31, 2023
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, 2023, 2022 and 2021:
(in thousands)Balance, January 1Charged to Cost and Expenses
Deductions 1, 2
Balance, December 31
Allowance for Credit Losses
2023$1,648 $2,014 $(1,140)$2,522 
20221,836 909 (1,097)1,648 
20213,215 93 (1,472)1,836 
Deferred Tax Asset Valuation Allowance
2023$— $— $— $— 
2022— — — — 
2021800 — (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.