ORGANIZATION (Details) (USD $)	3 Months Ended	12 Months Ended	36 Months Ended	3 Months Ended	12 Months Ended	36 Months Ended
	Mar. 31, 2014 MortgageLoans	Dec. 31, 2013	Mar. 31, 2014 MortgageLoans	Mar. 31, 2014 Common Stock [Member]	Dec. 31, 2013 Common Stock [Member]	Mar. 31, 2014 Common Stock [Member]	Feb. 04, 2010 Common Stock [Member]	Mar. 31, 2014 Office Properties [Member] properties	Mar. 31, 2014 Minimum [Member]	Feb. 04, 2010 Minimum [Member] Common Stock [Member]	Mar. 31, 2014 Maximum [Member]	Feb. 14, 2013 Maximum [Member] Common Stock [Member]	Feb. 04, 2010 Maximum [Member] Common Stock [Member]	Feb. 14, 2013 Maximum [Member] Common Stock [Member] Dividend Reinvestment Plan [Member]	Feb. 04, 2010 Maximum [Member] Common Stock [Member] Dividend Reinvestment Plan [Member]	Jan. 26, 2010 Advisor [Member]
Organizational Structure [Line Items]
Partnership interest in Operating Partnership	0.10%
Partnership interest in the Operating Partnership and is its sole limited partner	99.90%
Common stock, shares issued	80,182,921	66,430,888	80,182,921													20,000
Common stock, purchase price per share																$ 10.00
Shares held by affiliate				20,000		20,000
Percent of portfolio allocated to real estate related investments									0.00%		20.00%
Number of real estate properties								12
Number of first mortgage loan secured by a deed of trust	1		1
Stock offering, shares authorized for issuance										250,000			280,000,000
Shares of common stock authorized under dividend reinvestment plan, shares							80,000,000
Issuance of common stock, shares				13,806,949	39,574,268	80,584,260
Issuance of common stock, value	$ 137,383,000	$ 393,405,000	$ 801,700,000	$ 139,000	$ 396,000
Shares of common stock sold under dividend reinvestment plan, shares						2,523,237
Shares of common stock sold under dividend reinvestment plan, value			24,000,000
Redemptions of common stock, shares				54,916	291,511	421,339
Redemptions of common stock, value	524,000	2,783,000	4,000,000	1,000	3,000
Stock offering, shares authorized for issuance, shares												200,000,000
Stock offering, shares authorized for issuance, value												2,000,000,000	2,760,000,000
Stock offering, shares authorized for dividend reinvestment plan, value														$ 760,000,000	$ 760,000,000