Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies

Schedule of ground lease expense incurred, included in other expense

	For the Year Ended December 31,
	2012		2011		2010
Ground lease expense	$	43,421	$	42,284	$	36,750

Schedule of future minimum lease payments due under ground leases

2013	$	26,950
2014		28,196
2015		28,921
2016		29,097
2017		29,106
Thereafter		889,307
	$	1,031,577