INCOME TAXES Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at the beginning of the year	$ 198,540	$ 70,799	$ 92,134
Gross decrease related to prior period tax positions	(11,571)
Gross increases and decrease related to current period tax positions		513	0
Gross increases related to current period tax positions	30,676	119,261	4,193
Reductions related to lapse of statute of limitations	(149)	(142)	(91)
Gross increases and decreases related to U.S. tax reform	0	0	(25,437)
Gross increases and decreases related to acquisition	78	8,109	0
Balance at the end of the year	$ 217,574	$ 198,540	$ 70,799