SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended		6 Months Ended		12 Months Ended	51 Months Ended	57 Months Ended
	Aug. 11, 2015	Aug. 03, 2015	Jul. 07, 2015	Jul. 01, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Jun. 30, 2015	Aug. 07, 2015
Subsequent Event [Line Items]
Issuance of common stock, value							$ 536,238		$ 583,858	$ 1,800,000
Shares of common stock sold under dividend reinvestment plan, value										$ 72,000
Redemptions of common stock, value							$ 3,588		$ 3,637
Distribution rate per share per day, declared					$ 0.00178082	$ 0.00178082	$ 0.00178082	$ 0.00178082
Common Stock [Member]
Subsequent Event [Line Items]
Issuance of common stock, shares							51,259,476		57,372,731	175,151,056
Issuance of common stock, value							$ 513		$ 574
Shares of common stock sold under dividend reinvestment plan, shares										7,379,846
Redemptions of common stock, shares							367,405		377,073	1,110,901
Redemptions of common stock, value							$ 4		$ 4	$ 10,700
Subsequent Event [Member]
Subsequent Event [Line Items]
Issuance of common stock, value											$ 1,700,000
Subsequent Event [Member] | Dividend Paid [Member]
Subsequent Event [Line Items]
Distributions paid to common stockholders		$ 9,700		$ 9,200
Subsequent Event [Member] | Dividend Declared [Member]
Subsequent Event [Line Items]
Distribution rate per share per day, declared	$ 0.00178082		$ 0.00178082
Distribution rate per share annualized, declared, based on purchase price	6.50%		6.50%
Distribution rate per share annualized, declared, based on current estimated value	6.18%		6.18%
Subsequent Event [Member] | Dividend Declared [Member] | Initial Primary Offering Purchase Price [Member]
Subsequent Event [Line Items]
Common stock, purchase price per share	$ 10.00		$ 10.00
Subsequent Event [Member] | Dividend Declared [Member] | Most Recent Primary Offering Purchase Price [Member]
Subsequent Event [Line Items]
Common stock, purchase price per share	$ 10.51		$ 10.51
Subsequent Event [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Issuance of common stock, shares											169,009,930
Shares of common stock sold under dividend reinvestment plan, shares											8,407,637
Shares of common stock sold under dividend reinvestment plan, value											$ 82,300
Redemptions of common stock, shares											1,187,500
Redemptions of common stock, value											$ 11,500