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EMPLOYEE BENEFIT PLANS - Schedule of Allocation of Plan Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Pension Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 11,078 | $ 9,990 | $ 11,026
Pension Plans | Recurring |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 11,069 | 9,990 |
Pension Plans | Recurring | Large-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 2,144 | 1,730 |
Pension Plans | Recurring | Mid-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 590 | 477 |
Pension Plans | Recurring | Small-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 557 | 469 |
Pension Plans | Recurring | International |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 1,009 | 845 |
Pension Plans | Recurring | Fixed-income - core plus |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 4,028 | 3,945 |
Pension Plans | Recurring | Intermediate duration |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 1,371 | 1,321 |
Pension Plans | Recurring | Common stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 574 | 506 |
Pension Plans | Recurring | Common/collective trusts - large-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 566 | 469 |
Pension Plans | Recurring | Cash equivalents - money market |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 230 | 228 |
Pension Plans | Level 1 | Recurring |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 10,503 | 9,521 |
Pension Plans | Level 1 | Recurring | Large-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 2,144 | 1,730 |
Pension Plans | Level 1 | Recurring | Mid-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 590 | 477 |
Pension Plans | Level 1 | Recurring | Small-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 557 | 469 |
Pension Plans | Level 1 | Recurring | International |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 1,009 | 845 |
Pension Plans | Level 1 | Recurring | Fixed-income - core plus |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 4,028 | 3,945 |
Pension Plans | Level 1 | Recurring | Intermediate duration |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 1,371 | 1,321 |
Pension Plans | Level 1 | Recurring | Common stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 574 | 506 |
Pension Plans | Level 1 | Recurring | Common/collective trusts - large-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0 | 0 |
Pension Plans | Level 1 | Recurring | Cash equivalents - money market |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 230 | 228 |
Pension Plans | Level 2 | Recurring |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 566 | 469 |
Pension Plans | Level 2 | Recurring | Large-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0 | 0 |
Pension Plans | Level 2 | Recurring | Mid-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0 | 0 |
Pension Plans | Level 2 | Recurring | Small-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0 | 0 |
Pension Plans | Level 2 | Recurring | Fixed-income - core plus |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0 | 0 |
Pension Plans | Level 2 | Recurring | Intermediate duration |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0 | 0 |
Pension Plans | Level 2 | Recurring | Common stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0 | 0 |
Pension Plans | Level 2 | Recurring | Common/collective trusts - large-cap |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 566 | 469 |
Pension Plans | Level 2 | Recurring | Cash equivalents - money market |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | 0 | 0 |
Non-qualified Supplemental Executive Retirement Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets | $ 0 | $ 0 | $ 0

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