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EMPLOYEE BENEFIT PLANS - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Retirement Benefits [Abstract]          
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year $ 0   $ 0    
Payment for Pension Benefits     0   $ 0
Pension Cost (Reversal of Cost) $ (319,000) $ (225,000) $ (956,000) $ (675,000)