BUSINESS COMBINATIONS - Proforma summary of financials (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Business Acquisition, Pro Forma Information [Abstract]
Net revenues	$ 175,868	$ 394,006	$ 472,898	$ 714,019
Net income (loss)	$ (53,811)	$ 24,285	$ (62,949)	$ 25,861
Net income (loss) per common share - basic (in dollars per share)	$ (0.40)	$ 0.18	$ (0.47)	$ 0.19
Net income (loss) - diluted per common share (in dollars per share)	$ (0.40)	$ 0.17	$ (0.47)	$ 0.19
Weighted shares outstanding basic (in shares)	134,804,963	138,760,483	134,785,749	138,684,845
Weighted shares outstanding diluted (in shares)	134,804,963	139,074,229	134,785,749	139,221,904