CONCENTRATIONS (Tables)

12 Months Ended

Dec. 31, 2014

Revenues

Concentrations

Schedule of concentration risk from properties

	Year Ended December 31,
	2014			2013			2012
California		60.4	%		57.1	%		58.0	%
Washington, D.C.		24.7			26.5			25.8
Texas		7.7			8.1			7.6
North Carolina		5.1			6.1			6.5
New York		2.1			2.2			2.1
		100.0	%		100.0	%		100.0	%

Real estate investments

Concentrations

Schedule of concentration risk from properties

	December 31,
	2014			2013
California		52.3	%		50.5	%
Washington, D.C.		31.2			32.5
Texas		7.4			7.7
North Carolina		5.5			5.6
New York		3.6			3.7
		100.0	%		100.0	%