STOCK-BASED COMPENSATION (Fair Value of Restricted Stock and Restricted Stock Units Vested) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Service Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested	$ 66,633	$ 35,478	$ 27,038
Performance Targets
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested	0	1,046	9,085
Equity Classified Award | Service Period | Equity-Settled Award | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested	73	142	12,607
Equity Classified Award | Service Period | Equity-Settled Award | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested	48,111	24,987	10,620
Equity Classified Award | Performance Targets | Equity-Settled Award | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested	0	0	452
Equity Classified Award | Performance Targets | Equity-Settled Award | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested	0	1,046	0
Liability Classified Award | Service Period | Cash-Settled Award | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested	18,449	10,349	3,811
Liability Classified Award | Performance Targets | Equity-Settled Award | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested	$ 0	$ 0	$ 8,633