SIGNIFICANT ACCOUNTING POLICIES (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Document Fiscal Year Focus	2014
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)	$ 2.02398	$ 1.91678	$ 1.64506
Nondividend distributions (in dollars per share)	$ 0.08974	$ 0.21054	$ 0.29240
Unrecaptured Section 1250 capital gain (in dollars per share)	$ 0.09470	$ 0.00270	$ 0.14942
Other capital gain (in dollars per share)	$ 0.01158	$ 0.00998	$ 0.01312
Total Common Distributions	$ 2.22000	$ 2.14000	$ 2.10000