EQUITY COMPENSATION (Options) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Options
Exercised (in units)		(4,785,131)
Aggregate Intrinsic Value
Unrecognized compensation expenses		$ 90,500
Options
Options
Balance at the beginning of the period (in units)	18,741,504	18,741,504
Exercised (in units)		(4,905,998)
Expired (in units)		(366,366)
Forfeited (in units)		(42,270)
Balance at the end of the period (in units)		13,426,870
Exercisable at the end of the period (in units)		13,317,053
Weighted Average Exercise Price
Balance at the beginning of the period (in dollars per unit)	$ 18.99	$ 18.99
Exercised (in dollars per unit)		19.00
Expired (in dollars per unit)		19.00
Forfeited (in dollars per unit)		19.00
Balance at the end of the period (in dollars per unit)		18.99
Exercisable at the end of the period (in dollars per unit)		$ 18.99
Weighted Average Remaining Life
Weighted average remaining life	4 years 10 months 17 days
Expected to vest at the end of the period		4 years 4 months 2 days
Exercisable at the end of the period		4 years 3 months 29 days
Aggregate Intrinsic Value
Beginning balance		$ 224,260	$ 0
Ending balance		224,260	$ 0
Exercisable		$ 222,372
Shares purchased (in shares)		1
Term		ten years
Tax benefits of exercises		$ 4,300