Variable Interest Entities (Tables)
 6 Months Ended
Jun. 30, 2012
Variable Interest Entities [Abstract]  
Carrying amount and maximum exposure to loss relating to VIEs
                                 
    June 30
2012		     December 31
2011		  
    Carrying
Amount		     Maximum
Exposure
to Loss		     Carrying
Amount		     Maximum
Exposure
to Loss		  

Real estate joint ventures

   $ 24,089     $ 24,089     $ 35,551     $ 35,551  

Affordable housing real estate joint ventures

     24,171       60,966       20,749       61,124  
   

 

 

    

 

 

    

 

 

    

 

 

  

Total

   $ 48,260     $ 85,055     $ 56,300     $ 96,675