Real Estate Investments (Tables)

9 Months Ended

Sep. 30, 2012

Real Estate [Abstract]

Gross carrying value of the Company's Properties

	September 30, 2012		December 31, 2011
Land	$	649,689	$	677,891
Building and improvements	3,530,214		3,631,388
Tenant improvements	480,386		483,801
	$	4,660,289	$	4,793,080