Leasing Activity (Tables)

12 Months Ended

Dec. 31, 2015

Operating Leases, Future Minimum Payments Receivable [Abstract]

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, 2015 are as follows (in thousands):

2016	$	526,956
2017	480,827
2018	415,765
2019	348,887
2020	284,738
Thereafter	1,219,397
Total	$	3,276,570