EQUITY COMPENSATION (Options) (Details) - Stock Options - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Options
Balance at the beginning of the period (in units)	20,495,025
Granted (in units)	0
Exercised (in units)	(50,000)
Expired (in units)	(889,432)
Forfeited (in units)	(444,203)
Balance at the end of the period (in units)	19,111,390	20,495,025
Exercisable at the end of the period (in units)	12,715,808
Weighted Average Exercise Price
Balance at the beginning of the period (in dollars per unit)	$ 18.99
Granted (in dollars per unit)
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	$ 18.99
Exercisable at the end of the period (in dollars per unit)	$ 19.00
Weighted Average Remaining Life
Weighted average remaining life		6 years 1 month 2 days
Expected to vest at the end of the period	5 years 9 months 22 days
Exercisable at the end of the period	5 years 9 months 11 days
Aggregate Intrinsic Value
Beginning balance	$ 20,611
Exercised	90
Ending balance	32,655	$ 20,611
Exercisable	21,672
Unrecognized compensation expenses	$ 12,300
Weighted average period of compensation expense expected to be recognized	10 months 6 days
Stock option exercise	$ 1,000
Tax benefit from exercise of stock options	$ 40