Real Estate Investments (Tables)

6 Months Ended

Jun. 30, 2012

Real Estate [Abstract]

Gross carrying value of the Company's Properties

	June 30, 2012		December 31, 2011
Land	$	649,690	$	677,891
Building and improvements	3,522,597		3,631,388
Tenant improvements	466,760		483,801
	$	4,639,047	$	4,793,080