LONG-TERM DEBT (Schedule of Long Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Aug. 07, 2018
Secured Term Loans	$ 453,831	$ 519,850
Revolving Credit Facility	468,189
Unamortized deferred financing costs	(22,189)	(24,063)
Total long-term debt, net of unamortized deferred financing costs	446,000	610,787
Less: current portion of long-term debt	12,750	28,300
Long term debt, noncurrent	433,250	582,487
Revolving Credit Facility [Member]
Revolving Credit Facility	$ 14,358	$ 115,000
Revolving Loans [Member]
Total long-term debt, net of unamortized deferred financing costs			$ 115,000