EMPLOYEE BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2023

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 as set forth in the following table. The amounts are recognized in First Financial’s Consolidated Statements of Income related to the Company's pension plan.

	Three months ended
	March 31,
(Dollars in thousands)	2023		2022
Service cost	$	2,350	$	2,425
Interest cost	1,075		625
Expected return on assets	(2,700)		(2,750)
Amortization of prior service cost	0		(75)
Net actuarial loss	150		400
Net periodic benefit cost (income)	$	875	$	625