Annual report pursuant to Section 13 and 15(d)

Tenant Leases (Details)

v2.4.0.6
Tenant Leases (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Property Subject to or Available for Operating Lease [Line Items]  
2013 558,435
2014 502,596
2015 436,351
2016 385,587
2017 329,106
2018 and thereafter 1,182,699
Total 3,394,774
Tenant Leases [Member]
 
Property Subject to or Available for Operating Lease [Line Items]  
Operating leases with various expiration dates through year Mar. 31, 2033