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RETIREMENT PLANS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan percentage of plan assets | 100.00% | 100.00% |
Employer contributions | $ 456 | $ 2,358 |
Cash contributions to ESOP | (1,450) | (1,400) | $ (1,470)
Cash contributions to ESOP for employees no longer participating in plan | 1,100 | 1,100 | 1,200
Pension plans with accumulated benefit obligations in excess of plan assets, aggregate accumulated benefit obligation | 81,500 | 102,400 |
Pension and other postretirement defined benefit plans, liabilities | 7,500 | 8,800 |
Accumulated other comprehensive income/(loss) | (139,974) | (2,426) | 9,764
First Financial Corporation Common Stock |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan assets equity securities | $ 17,200 | $ 18,100 |
Percentage of plan assets (percent) | 24.00% | 21.00% |
Equity Securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan percentage of plan assets | 63.00% | 63.00% |
Debt securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan percentage of plan assets | 34.00% | 32.00% |
Other securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan percentage of plan assets | 3.00% | 5.00% |
Pension Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Employer contributions | $ 126 | $ 2,050 | 4,440
Expected contributions to pension plan in 2014 | $ 0 |  |
Employee Stock Ownership Plan |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan percentage of plan assets | 100.00% | 100.00% |
Cash contributions to ESOP | $ (642) |  |
Employee Stock Ownership Plan | First Financial Corporation Common Stock |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan assets equity securities | $ 7,800 | $ 7,200 |
Employee Stock Ownership Plan | Equity Securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan percentage of plan assets | 99.00% | 98.00% |
Employee Stock Ownership Plan | Debt securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan percentage of plan assets | 0.00% | 0.00% |
Employee Stock Ownership Plan | Other securities |  |  |
Defined Benefit Plan Disclosure |  |  |
Defined benefit plan percentage of plan assets | 1.00% | 2.00% |
Supplemental Employee Retirement Plans, Defined Benefit |  |  |
Defined Benefit Plan Disclosure |  |  |
Pension expense | $ 751 | $ 748 | 539
Accumulated other comprehensive income (loss), after tax | 1,200 | 3,200 |
Accumulated other comprehensive income/(loss) | (546) | (212) |
Postretirement Health Coverage |  |  |
Defined Benefit Plan Disclosure |  |  |
Expected contributions to pension plan in 2014 | 245 |  |
Pension expense | 300 | 259 |
Amortization of transition obligations (assets) | $ 0 | $ 0 | $ 0

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- Definition Assets, equity stocks, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References No definition available. + Details
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