Quarterly report pursuant to Section 13 or 15(d)

Real Estate Transactions (Narrative) (Details)

v2.4.0.8
Real Estate Transactions (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended
Apr. 10, 2014
Andover Place [Member]
item
Feb. 24, 2014
Keystone Portfolio [Member]
property
sqft
Feb. 24, 2014
Keystone Portfolio [Member]
Parent Company [Member]
Feb. 24, 2014
Keystone Portfolio [Member]
Keystone Affiliates [Member]
Mar. 11, 2014
22 Sylvan Way [Member]
sqft
Real Estate Properties [Line Items]          
Number of units 220        
Cash consideration $ 37.7        
Number of properties held for sale   15      
Area of real estate property held for sale (in square feet)   2,300,000     249,409
Sale price of property   230.8     96.6
Sale price of property, cash   201.7      
Sale price of property, capital accounts   22.2      
Number of properties with senior pari passu interest   3      
Sale price of property, capital balance in properties in which senior pari passu interest is held   $ 6.9      
Internal rate of return     15.00% 10.00%  
Due diligence extension period   30 days