Mortgages Payable (Tables)

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]

As of December 31, 2012, contractual principal payments for the five subsequent years and thereafter are as follows (in thousands):

Year	Total
2013	$	491,567
2014		566,896
2015		1,207,041
2016		1,719,827
2017		1,742,251
Thereafter		85,201,796
	$	90,929,378
Add: Unamortized fair value debt adjustment		5,170,312
Total	$	96,099,690