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Schedule II - Valuation and Qualifying Accounts and Reserves
 12 Months Ended
Dec. 31, 2024
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, 2024, 2023 and 2022:
(in thousands)Balance, January 1Charged to Cost and Expenses
Deductions(1)
Balance, December 31
Allowance for Credit Losses
2024$2,522 $1,242 $(1,844)$1,920 
20231,648 2,014 (1,140)2,522 
20221,836 909 (1,097)1,648 
(1)Amounts reflect deductions to the allowance for amounts written-off, net of recoveries.