SIGNIFICANT ACCOUNTING POLICIES (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Federal Income Tax Treatment of Share Distributions [Abstract]
Ordinary taxable income distribution requirement	90.00%
Common Stock
Federal Income Tax Treatment of Share Distributions [Abstract]
Ordinary income (in dollars per share)	$ 1.64506	$ 1.68516	$ 1.47748
Return of capital (in dollars per share)	$ 0.29240	$ 0.39484	$ 0.60252
Unrecaptured Section 1250 capital gain (in dollars per share)	$ 0.14942	$ 0.00000	$ 0.00000
Other capital gain (in dollars per share)	$ 0.01312	$ 0.00000	$ 0.00000
Total Common Distributions	$ 2.10000	$ 2.08000	$ 2.08000