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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