Annual report pursuant to Section 13 and 15(d)

Investments In Unconsolidated Joint Ventures (Narrative) (Details)

v3.3.1.900
Investments In Unconsolidated Joint Ventures (Narrative) (Details)
 3 Months Ended 12 Months Ended
Aug. 28, 2015
USD ($)
ft²
Jul. 14, 2015
USD ($)
item
Jun. 01, 2015
USD ($)
item
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2015
USD ($)
ft²
property
item
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Nov. 12, 2015
ft²
Oct. 06, 2015
Aug. 27, 2015
USD ($)
Schedule of Equity Method Investments [Line Items]                            
Company's investments in unconsolidated joint ventures, net                 $ 303,457,000 $ 247,468,000        
Area of mixed use project (in square feet) | ft²                 81,700          
Amount outstanding                 $ 155,000,000 0        
Management, leasing, development and other services fees                 5,500,000 6,200,000        
Accounts receivable due from unconsolidated joint ventures                 800,000 1,000,000        
Maximum exposure to loss                 207,100,000          
Estimated future funding commitments                 33,700,000          
Mortgage loan                 1,840,668,000          
Proceeds from mortgages and loans payable                 10,752,000 130,135,000 $ 3,170,000      
Realized gains on disposition of rental property       $ 18,718,000 $ 34,399,000 $ 144,000 $ 264,000 $ 54,584,000 $ 53,261,000 54,848,000        
Unconsolidated Joint Venture Office Buildings [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Number of properties | property                 36          
Unconsolidated Joint Venture Office And Retail Buildings [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Area of property (in square feet) | ft²                 5,600,000          
Unconsolidated Joint Venture Retail Buildings [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Number of properties | property                 2          
Unconsolidated Joint Venture Multi-Family Properties [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Number of properties | property                 13          
Number of units | item                 4,343          
Unconsolidated Joint Venture Hotel [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Number of units | item                 350          
Percentage of interest in venture                         90.00%  
Unconsolidated Joint Venture Development Projects [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Number of units | item                 1,074          
Unconsolidated Joint Venture Land Parcels [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Number of units | item                 2,910          
Unconsolidated Joint Ventures [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Maximum borrowing capacity                 $ 547,600,000          
Amount outstanding                 309,900,000          
Unconsolidated Joint Ventures [Member] | Parent Company [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Maximum borrowing capacity                 74,700,000          
Amount outstanding                 $ 53,100,000          
Minimum [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Percentage of interest in venture                 7.50%          
Maximum [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Percentage of interest in venture                 85.00%          
Variable Interest Entity [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Company's investments in unconsolidated joint ventures, net                 $ 173,400,000          
Number of VIEs | property                 5          
Office [Member] | Unconsolidated Joint Venture Land Parcels [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Area of property (in square feet) | ft²                 1,400,000          
South Pier At Harborside [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Number of units | item [1],[2]                 350          
Percentage of interest in venture [1],[2],[3]                 50.00%          
Letter of credit                 $ 3,600,000          
Mortgage loan [1],[2]                 63,741,000          
Keystone-Penn [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Company's investments in unconsolidated joint ventures, net                 $ 0          
Area of property (in square feet) | ft² 236,417               1,842,820 [4]          
Percentage of interest in venture [3],[4],[5]                          
Mortgage loan $ 45,500,000               $ 227,111,000 [4],[6]         $ 31,800,000
Proceeds from mortgages and loans payable $ 3,700,000                          
RiverPark At Harrison I, L.L.C. [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Company's investments in unconsolidated joint ventures, net [4]                 $ 2,544,000 4,744,000        
Number of units | item   141             141 [4]          
Percentage of interest in venture   36.00%             45.00% [3],[4]          
Proceeds from loans   $ 1,700,000                        
Mortgage loan   30,000,000             $ 30,000,000 [4]          
RiverPark At Harrison I, L.L.C. [Member] | Construction Loan [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Construction loan   $ 23,400,000                        
RiverPark At Harrison I, L.L.C. [Member] | Unconsolidated Joint Venture Multi-Family Properties [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Percentage of interest in venture   44.00%                        
Percentage of additional interest acquired   20.00%                        
Third party ownership percentage   55.00%                        
Capital balance   $ 2,100,000                        
Rosewood Lafayette Holdings, L.L.C. [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Company's investments in unconsolidated joint ventures, net [4]                   $ 62,000        
Number of units | item     217           217 [4]          
Percentage of interest in venture     25.00%           25.00% [3],[4]          
Realized gains on disposition of rental property     $ 6,400,000                      
Edison [Member]                            
Schedule of Equity Method Investments [Line Items]                            
Area of property (in square feet) | ft²                       196,128    
[1] Balance includes: (i) mortgage loan, collateralized by the hotel property, with a balance of $60,147, bears interest at 6.15 percent and matures in November 2016, and (ii) loan with a balance of $3,594, bears interest at fixed rates ranging from 6.09 percent to 6.62 percent and matures in August 1, 2020. The Company posted a $3.6 million letter of credit in support of this loan, half of which is indemnified by the partner.
[2] The negative carrying value for this venture of $3,317 and $1,854 as of December 31, 2015 and 2014, respectively, were included in accounts payable, accrued expenses and other liabilities.
[3] Company's effective ownership % represents the Company's entitlement to residual distributions after payments of priority returns, where applicable.
[4] See discussion in Recent Transactions following in this footnote.
[5] The Company's equity interests in the joint ventures will be subordinated to Keystone Entities receiving a 15 percent internal rate of return ("IRR") after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally. See discussion in Recent Transactions following in this footnote.
[6] Principal balance of $127,600 bears interest at 5.114 percent and matures on August 27, 2023; principal balance of $45,500 bears interest at 5.01 percent and matures on September 6, 2025; principal balance of $32,336 bears interest at rates ranging from LIBOR+5.0 percent to LIBOR+5.75 percent and matures on August 27, 2016; principal balance of $11,250 bears interest at LIBOR+5.5 percent and matures on January 9, 2019; principal balance of $10,425 bears interest at LIBOR+6.0 percent matures on August 31, 2016.