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EMPLOYEE BENEFIT PLANS - Schedule of Allocation of Plan Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]    
Plan assets   $ 10,622
Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets $ 11,026  
Pension Plans | Recurring    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 11,025  
Pension Plans | Recurring | Large-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 2,143  
Pension Plans | Recurring | Mid-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 612  
Pension Plans | Recurring | Small-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 613  
Pension Plans | Recurring | International    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 1,150  
Pension Plans | Recurring | Fixed-income - core plus    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 3,896  
Pension Plans | Recurring | Intermediate duration    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 1,316  
Pension Plans | Recurring | Common stock    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 610  
Pension Plans | Recurring | Common/collective trusts - large-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 555  
Pension Plans | Recurring | Cash equivalents - money market    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 130  
Pension Plans | Level 1 | Recurring    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 10,470  
Pension Plans | Level 1 | Recurring | Large-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 2,143  
Pension Plans | Level 1 | Recurring | Mid-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 612  
Pension Plans | Level 1 | Recurring | Small-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 613  
Pension Plans | Level 1 | Recurring | International    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 1,150  
Pension Plans | Level 1 | Recurring | Fixed-income - core plus    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 3,896  
Pension Plans | Level 1 | Recurring | Intermediate duration    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 1,316  
Pension Plans | Level 1 | Recurring | Common stock    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 610  
Pension Plans | Level 1 | Recurring | Common/collective trusts - large-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 0  
Pension Plans | Level 1 | Recurring | Cash equivalents - money market    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 130  
Pension Plans | Level 2 | Recurring    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 555  
Pension Plans | Level 2 | Recurring | Large-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 0  
Pension Plans | Level 2 | Recurring | Mid-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 0  
Pension Plans | Level 2 | Recurring | Small-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 0  
Pension Plans | Level 2 | Recurring | Fixed-income - core plus    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 0  
Pension Plans | Level 2 | Recurring | Intermediate duration    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 0  
Pension Plans | Level 2 | Recurring | Common stock    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 0  
Pension Plans | Level 2 | Recurring | Common/collective trusts - large-cap    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets 555  
Pension Plans | Level 2 | Recurring | Cash equivalents - money market    
Defined Benefit Plan Disclosure [Line Items]    
Plan assets $ 0