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EMPLOYEE BENEFIT PLANS (Details) - Multiple employer pension plan - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Employee benefit plans        
Interest cost $ 64 $ 63 $ 192 $ 188
Expected return on plan assets (117) (126) (352) (376)
Amortization of net losses 22 20 66 61
Net periodic benefit, Total $ (31) $ (43) $ (94) $ (127)