EQUITY AND CONVERTIBLE PREFERRED STOCK - Preferred Stock (Details)										12 Months Ended
	Jul. 31, 2020 USD ($) shares	May 26, 2020 USD ($) shares	May 11, 2020 USD ($) $ / shares shares	Mar. 27, 2020 shares	Feb. 27, 2020 shares	Jun. 18, 2019 shares	Jun. 14, 2019 shares	Feb. 04, 2019 shares	Jan. 15, 2019 shares	Jun. 30, 2020 USD ($) vote $ / shares shares	Apr. 29, 2020 shares	Mar. 26, 2020 shares	Feb. 18, 2020 USD ($)	Nov. 18, 2019 USD ($)	Sep. 09, 2019 USD ($)	Jun. 30, 2019 USD ($) $ / shares shares	Jun. 17, 2019 shares	Jun. 13, 2019 shares	Jun. 06, 2019 USD ($)	Feb. 28, 2019 USD ($)	Jan. 14, 2019 shares	Nov. 30, 2018 USD ($)	Aug. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	May 31, 2018 USD ($)	May 18, 2018 shares	May 17, 2018 shares	Feb. 28, 2018 USD ($)	Nov. 30, 2017 USD ($)	Nov. 16, 2017 shares	Sep. 01, 2017 USD ($)	Mar. 27, 2017 shares	Feb. 16, 2017 shares
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares										$ 0.01						$ 0.01
Preferred stock, shares authorized (shares)										20,000,000.0						20,000,000.0
Vesting period										3 years
Preferred stock, shares issued (shares)										1,500,000						9,400,000
Preferred stock classified as a liability | $										$ 100,000
Dividends payable | $										$ 3,600,000			$ 1,200,000	$ 1,300,000	$ 1,100,000	$ 4,300,000			$ 1,100,000	$ 1,200,000		$ 1,200,000	$ 800,000	$ 3,300,000	$ 800,000			$ 800,000	$ 900,000		$ 800,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares										$ 0.01
Number of votes entitled to holders | vote										0
Preferred stock, shares authorized (shares)						2,900,000			3,300,000								3,300,000				6,300,000					6,300,000	6,500,000
Stock cancelled during period (in shares)						400,000			3,000,000.0
Preferred stock, shares issued (shares)										1,500,000																				1,000,000.0		1,000,000.0	500,000
Preferred stock, shares outstanding (shares)										1,500,000																				200,000		1,000,000.0	300,000
Series A-1 Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (shares)				0			7,900,000					7,900,000						6,900,000
Stock authorized, designated and issued during period (in shares)							1,000,000.0	6,900,000
Stock reacquired, retired and cancelled (in shares)				7,900,000	6,900,000
Preferred stock, shares issued (shares)										0
Preferred stock, shares outstanding (shares)										0
Convertible Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.01
Investment agreement, shares to be sold (in shares)			1,000,000
Investment agreement, maximum aggregate purchase price | $			$ 1,000,000,000.0
Investment agreement, sale of stock (in dollars per share) | $ / shares			$ 1,000
Issuance and sale of stock (in shares)		750,000
Issuance and sale of stock, aggregate purchase price | $		$ 750,000,000.0
Direct and incremental issuance expense | $		$ 40,700,000
Preferred stock dividend rate		9.00%								9.00%
Dividends payable | $										$ 6,500,000
Liquidation preference (in dollars per share) | $ / shares										$ 1,000
Liquidation preference | $										$ 1,000,000,000.0
Preferred stock dividend rate, increase on seven-year anniversary of issuance										1.00%
Preferred stock dividend rate, annual increase on each subsequent anniversary										1.00%
Preferred stock dividend rate, maximum after increases										12.00%
Preferred stock dividend rate, additional increase if dividends are not paid										1.00%
Conversion price (in dollars per share) | $ / shares										$ 6.24
Conversion ratio										160.2564
Volume weighted average price for 20 trading days exceeds, Company may convert shares (in dollars per share) | $ / shares										$ 12.48
Dividends payable as if converted (in shares)										121,233,944
Redemption features, percentage of liquidation preference										100.00%
Redemption features, multiplier of unpaid dividends after fifth anniversary and prior to sixth anniversary										107.00%
Redemption features, multiplier of unpaid dividends after sixth anniversary and prior to seventh anniversary										105.00%
Redemption features, multiplier of unpaid dividends after seventh anniversary										100.00%
Change of control put, percentage of liquidation preference, on or before fifth anniversary										110.00%
Change of control put, percentage of liquidation preference, on or after fifth anniversary										100.00%
Convertible Series B Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Issuance and sale of stock (in shares)	250,000
Issuance and sale of stock, aggregate purchase price | $	$ 250,000,000.0
Convertible Series B Preferred Stock | Initial Issuance
Class of Stock [Line Items]
Investment agreement, shares to be sold (in shares)			750,000
Convertible Series B Preferred Stock | Second Issuance
Class of Stock [Line Items]
Investment agreement, shares to be sold (in shares)			250,000
Convertible Series B Preferred Stock | Second Issuance | Subsequent Event
Class of Stock [Line Items]
Issuance and sale of stock (in shares)	250,000
Issuance and sale of stock, aggregate purchase price | $	$ 250,000,000.0
Common Class A
Class of Stock [Line Items]
Dividend Reinvestment Program, shares registered for purchase (in shares)											19,300,000
Dividend Reinvestment Program, percentage of cash dividends reinvested											50.00%
Tranche One | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (shares)										1,000,000.0
Tranche One | Stock Compensation Plan | Series A-1 Preferred Stock
Class of Stock [Line Items]
Award vesting rights, percentage										60.00%
Vesting period										3 years
Tranche Two | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (shares)										300,000
Tranche Two | Stock Compensation Plan | Series A-1 Preferred Stock
Class of Stock [Line Items]
Award vesting rights, percentage										20.00%
Vesting period										4 years
Tranche Three | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (shares)										200,000
Tranche Three | Stock Compensation Plan | Series A-1 Preferred Stock
Class of Stock [Line Items]
Award vesting rights, percentage										20.00%
Vesting period										5 years