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BENEFIT PLANS (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Pension Plans [Abstract] |  |  |  |
Contribution made to defined benefit pension plan by employer |  |  |  | $ 2,900
Pension Benefits [Member] |  |  |  |
Pension Plans [Abstract] |  |  |  |
Contribution made to defined benefit pension plan by employer |  |  |  | 100
Net periodic benefit cost [Abstract] |  |  |  |
Service cost | $ 1,240 | $ 1,480 | $ 2,480 | 2,960
Interest cost | 1,334 | 1,259 | 2,668 | 2,518
Expected return on plan assets | (4,756) | (4,695) | (9,512) | (9,391)
Amortization of unrecognized net loss | 211 | 900 | 422 | 1,800
Amortization of prior service cost | 154 | 94 | 308 | 189
Net periodic (benefit) | (1,817) | (962) | (3,634) | (1,924)
Post-retirement Benefits [Member] |  |  |  |
Net periodic benefit cost [Abstract] |  |  |  |
Service cost | 0 | 0 | 0 | 0
Interest cost | 11 | 11 | 22 | 22
Expected return on plan assets | 0 | 0 | 0 | 0
Amortization of unrecognized net loss | 9 | 11 | 18 | 22
Amortization of prior service cost | (45) | (44) | (90) | (89)
Net periodic (benefit) | $ (25) | $ (22) | $ (50) | (45)
Steuben Trust Company Pension Plan |  |  |  |
Pension Plans [Abstract] |  |  |  |
Contribution made to defined benefit pension plan by employer |  |  |  | $ 90

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