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EMPLOYEE RETIREMENT PLANS - Schedule of change in benefit obligation and plan assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Change in projected benefit obligation |  |  |
Service cost | $ 467 | $ 445 |
Interest cost | 2,632 | 1,754 |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Long-term pension liability | (13,412) | (15,523) |
Amounts recognized in accumulated other comprehensive loss consist of: |  |  |
Net amount recognized | 9,357 | 11,597 | $ 18,011
Defined Benefit Pension Plan |  |  |
Change in projected benefit obligation |  |  |
Projected benefit obligation, beginning of year | 39,609 | 52,507 |
Service cost | 467 | 445 |
Interest cost | 2,052 | 1,243 |
Actuarial gain | 916 | (12,028) |
Benefits paid | (2,633) | (2,558) |
Projected benefit obligation, end of year | 40,411 | 39,609 |
Change in plan assets |  |  |
Actual return on plan assets | 5,214 | (5,652) |
Administrative expenses | (467) | (445) |
Benefits paid | (2,633) | (2,558) |
Funded status of plan | (2,370) | (3,682) |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Long-term pension liability | (2,370) | (3,682) |
Net amount recognized | (2,370) | (3,682) |
Amounts recognized in accumulated other comprehensive loss consist of: |  |  |
Accumulated loss, net of income tax benefit of $0,000, $3,382, $000, and $672, respectively | 8,150 | 9,629 |
Net amount recognized | 8,150 | 9,629 |
Supplemental Pension Plan |  |  |
Change in projected benefit obligation |  |  |
Projected benefit obligation, beginning of year | 12,372 | 20,343 |
Interest cost | 580 | 511 |
Plan settlement |  | (4,276) |
Actuarial gain | (1,001) | (3,864) |
Benefits paid | (342) | (342) |
Projected benefit obligation, end of year | 11,609 | 12,372 |
Change in plan assets |  |  |
Contributions |  | 4,618 |
Benefits paid |  | (342) |
Funded status of plan | (11,609) | (12,372) |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Accrued liabilities - other | (567) | (531) |
Long-term pension liability | (11,042) | (11,841) |
Net amount recognized | (11,609) | (12,372) |
Amounts recognized in accumulated other comprehensive loss consist of: |  |  |
Accumulated loss, net of income tax benefit of $0,000, $3,382, $000, and $672, respectively | 1,168 | 1,914 |
Prior service cost net of income tax benefit of $0, $0, $00 and $19, respectively | 39 | 54 |
Net amount recognized | 1,207 | 1,968 |
Plan Assets |  |  |
Change in plan assets |  |  |
Fair value of plan assets, beginning of year | 35,927 |  |
Fair value of plan assets, end of year |  | 35,927 |
Plan Assets | Defined Benefit Pension Plan |  |  |
Change in plan assets |  |  |
Fair value of plan assets, beginning of year | 35,927 | 44,582 |
Fair value of plan assets, end of year | $ 38,041 | $ 35,927 |

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