Leasing Activity (Tables)

12 Months Ended

Dec. 31, 2013

Operating Leased Assets [Line Items]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Future minimum rental payments due from tenants under noncancelable operating leases as of December 31, 2013 are as follows (in thousands):

2014	$	555,691
2015	498,377
2016	417,793
2017	328,969
2018	255,675
Thereafter	819,870
TOTAL	$	2,876,375