Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Investments In Unconsolidated Joint Ventures [Abstract]    
Rental property, net $ 1,546,589 $ 1,534,812
Other assets 410,410 398,222
Total assets 1,956,999 1,933,034
Mortgages and loans payable 1,162,732 1,060,020
Other liabilities 214,572 211,340
Partners'/members' capital 579,695 661,674
Total liabilities and partners'/members' capital $ 1,956,999 $ 1,933,034