PENSION LIABILITY (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Pension liability	$ 66,538	$ 68,359
Payments through April 30, 2024 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected future employer contributions	800
Payments from May 1, 2024 through November 30, 2033 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected future employer contributions	$ 1,700