EMPLOYEE BENEFIT PLANS - SERP Expected Benefit Payments (Details) - Supplemental Executive Retirement Plan ("SERP") [Member] $ in Thousands  | 
 Dec. 31, 2019  
USD ($) 
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| Defined Benefit Plan Disclosure [Line Items] | |
| 2020 | $ 4,059 | 
| 2021 | 2,618 | 
| 2022 | 2,478 | 
| 2023 | 1,419 | 
| 2024 | 211 | 
| 2025 through 2029 | 0 | 
| Total | $ 10,785 | 
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- Definition Amount of benefits expected to be paid in the fiscal years from a defined benefit plan. No definition available. 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Details 
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