EQUITY - Common Stock and Warrants and Public Offering (Details) - $ / shares		3 Months Ended	12 Months Ended
	Nov. 09, 2018	Jun. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Nov. 08, 2018	Aug. 07, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Percentage of one warrant per offered unit		33.33%
Number of warrant outstanding (in shares)			12,577,350
Warrant exercise price (in USD per share)	$ 11.50
Warrant issued during period (in shares)	3,182,140
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)			1,500,000,000	1,500,000,000
Common stock, par value (in USD per share)			$ 0.0001	$ 0.0001
Common stock, shares outstanding (in shares)	74,929,305		74,929,305	74,929,305	67,616,277	65,496,277	37,732,112
Class C Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)			1,500,000,000	1,500,000,000
Common stock, par value (in USD per share)			$ 0.0001	$ 0.0001
Common stock, shares outstanding (in shares)	250,000,000		250,000,000	250,000,000
IPO
Class of Stock [Line Items]
Number of units sold (in shares)		37,732,112
Offering price (in USD per share)		$ 10.00
Warrant expiration period			5 years
Warrant redemption price (in USD per share)			$ 0.01
Period of notice prior to warrant redemption			30 days
Warrant redemption stock price trigger (in USD per share)			$ 18.00
Warrant redemption threshold trading period			20 days
Warrant redemption threshold consecutive trading period			30 days
IPO | Class A Common Stock
Class of Stock [Line Items]
Number of common stock per offered unit (in shares)		1
Warrant exercise price (in USD per share)			$ 11.50
Over-Allotment Option
Class of Stock [Line Items]
Number of units sold (in shares)		2,732,112
Private Placement
Class of Stock [Line Items]
Warrant issued during period (in shares)			6,364,281
Private Placement | Class A Common Stock
Class of Stock [Line Items]
Offering price (in USD per share)	$ 10.00
Apache
Class of Stock [Line Items]
Number of warrant outstanding (in shares)			3,182,140