ACCOUNTING POLICIES ACCOUNTING POLICIES - Schedule of Deferred Revenues (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Contract with Customer, Liability	$ 54,143	$ 41,821	$ 50,578
Increase (Decrease) in Contract with Customer, Liability	41,520	36,622
Contract with Customer, Liability, Revenue Recognized	$ (29,198)	$ (45,379)