BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and cash equivalents	$ 22,758	$ 298,841	$ 23,801
Other assets	9,875		9,222
Decrease to net cash provided by (used in) operating activities	$ (5,983)	(14,393)
Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and cash equivalents		(588)		$ (272)
Other assets		588	$ 272
Decrease to net cash provided by (used in) operating activities		$ 316