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EMPLOYEE BENEFIT PLANS (Tables)
9 Months Ended
Sep. 30, 2024
Retirement Benefits [Abstract]  
Employee Benefit Plan Amounts Recognized in the Consolidated Balance Sheets and Consolidated Statements of Income
As a result of the plan’s actuarial projections, First Financial recorded expense in the Company's Consolidated Statements of Income, as set forth in the following table.
Three months endedNine months ended
September 30,September 30,
(Dollars in thousands)2024202320242023
Service cost$2,624 $2,304 $7,474 $6,988 
Interest cost1,080 1,066 3,680 3,213 
Expected return on assets(2,647)(2,701)(7,897)(8,101)
Amortization of prior service cost44
Net actuarial loss485 208 1,235 528 
     Net periodic benefit cost (income)$1,546 $882 $4,496 $2,634