STOCKHOLDERS' EQUITY - Preferred Stock (Details) - Registration statement - USD ($)	Apr. 22, 2016	Sep. 30, 2016
Registration statement
Preferred stock stated value (in dollars per share)	$ 25
Warrant right to purchase a share of Common Stock	0.25
Maximum number of units in offering	36,000,000
Number of preferred share in a unit	1
Number of warrant in a unit	1
Cumulative dividend rate	5.50%
Premium of the exercise price of the warrant as a percent to net asset value of common stock	15.00%
Series A Preferred Stock
Registration statement
Maximum amount of offering	$ 900,000,000
Preferred stock stated value (in dollars per share)	$ 0.001
Preferred stock, outstanding shares		0