XML 42 R77.htm IDEA: XBRL DOCUMENT v2.4.0.6
Intangible Assets (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Annual amortization of intangible assets and liabilities      
Intangible Assets, net $ 70,620 $ 70,515  
Assets [Member]
     
Annual amortization of intangible assets and liabilities      
2013 15,316    
2014 12,399    
2015 10,027    
2016 6,009    
2017 4,743    
Thereafter 22,126    
Intangible Assets, net 70,620    
Liabilities [Member]
     
Annual amortization of intangible assets and liabilities      
2013 7,639    
2014 6,087    
2015 3,920    
2016 1,980    
2017 1,445    
Thereafter 12,788    
Intangible Assets, net 33,859    
Tenant Move-Outs Prior to End of the Lease Term [Member]
     
Finite-Lived Intangible Assets [Line Items]      
Intangible Assets Written Off Through Accelerated Amortization 1,400 7,400 1,500
Intangible Liabilities Written Off Through Accelerated Amortization   $ 200