Leasing Activity (Tables)

12 Months Ended

Dec. 31, 2014

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, 2014 are as follows (in thousands):

2015	$	540,996
2016	486,016
2017	400,297
2018	330,906
2019	258,777
Thereafter	1,019,497
Total	$	3,036,489