BUSINESS COMBINATIONS - Proforma summary of financials (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Business Acquisition, Pro Forma Information [Abstract]
Net revenues	$ 297,030	$ 320,013
Net income (loss)	$ (9,138)	$ 1,577
Net income (loss) per common share - basic (in dollars per share)	$ (0.07)	$ 0.01
Net income (loss) - diluted per common share (in dollars per share)	$ (0.07)	$ 0.01
Weighted shares outstanding basic (in shares)	134,890,401	138,099,180
Weighted shares outstanding diluted (in shares)	134,890,401	138,523,371