Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies

Schedule of ground lease expense incurred, included in other expense

	For the Year Ended December 31,
	2011		2010		2009
Ground lease expense	$	42,284	$	36,750	$	32,086

Schedule of future minimum lease payments due under ground leases

2012	$	26,193
2013		26,627
2014		26,593
2015		27,272
2016		27,442
Thereafter		851,184
	$	985,311