Real Estate Transactions (Acquisitions) (Narrative) (Details) (USD $)
|
12 Months Ended |
Dec. 31, 2013
item
|
Dec. 31, 2012
|
Real Estate Properties [Line Items] |
|
|
Transaction costs |
$ 642,000
|
|
Number of parking spaces |
850
|
|
Total purchase price |
236,559,000
|
|
Purchase accounting adjustments |
0
|
|
Goodwill |
2,945,000
|
2,945,000
|
Capitalization rate |
8.50%
|
9.00%
|
Earn out paid |
2,755,000
|
|
Multi-Family Properties [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Number of units |
3,678
|
|
Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Transaction costs |
|
5,800,000
|
Total purchase price |
|
115,602,000
|
Cash consideration |
|
115,579,000
|
Contingent consideration at fair value |
10,010,000
|
|
Purchase accounting adjustments |
0
|
|
Business acquisition, contingent cash payment |
15,600,000
|
|
Goodwill |
|
2,945,000
|
Contingent purchase price measurement period |
33 months
|
|
Discount on contingently returnable consideration |
0
|
|
Amount of cash deposited to escrow |
34,000,000
|
|
Roseland Partners, L.L.C. [Member] | Multi-Family Properties [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Number of real estate properties |
|
6
|
Number of units |
|
1,769
|
Roseland Partners, L.L.C. [Member] | Condo-Residential Properties [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Number of real estate properties |
|
1
|
Number of units |
|
3
|
Roseland Partners, L.L.C. [Member] | Commercial Properties [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Number of real estate properties |
|
4
|
Area of property (in square feet) |
|
212,000
|
In-Process Development Projects [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Number of real estate properties |
|
13
|
In-Process Development Projects [Member] | Roseland Partners, L.L.C. [Member] | Multi-Family Properties [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Number of real estate properties |
|
9
|
Number of units |
|
2,149
|
In-Process Development Projects [Member] | Roseland Partners, L.L.C. [Member] | Garages [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Number of real estate properties |
|
2
|
Number of parking spaces |
|
1,591
|
In-Process Development Projects [Member] | Roseland Partners, L.L.C. [Member] | Retail [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Number of real estate properties |
|
2
|
Area of property (in square feet) |
|
35,400
|
Interests Or Options In Land Parcels [Member] | Roseland Partners, L.L.C. [Member] | Multi-Family Properties [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Number of units |
|
5,980
|
Area of property (in square feet) |
|
736,000
|
Interests Or Options In Land Parcels [Member] | Roseland Partners, L.L.C. [Member] | Hotel [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Number of units |
|
321
|
Roseland Assets [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Contingent consideration at fair value |
6,300,000
|
|
Business acquisition, contingent cash payment |
8,600,000
|
|
Completion Of Certain Developments [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Business acquisition, contingent cash payment |
2,800,000
|
|
Start Of Construction On Certain Developments [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Business acquisition, contingent cash payment |
2,800,000
|
|
Obtaining Of Tax Credits/Grants [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Business acquisition, contingent cash payment |
3,000,000
|
|
Business acquisition, earn out period |
3 years
|
|
Probability of occurrence of contingent consideration payment events |
50.00%
|
|
Total Return To Shareholders [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Contingent consideration at fair value |
3,700,000
|
|
Business acquisition, contingent cash payment |
7,000,000
|
|
Business acquisition, earn out period |
3 years
|
|
Failure To Achieve Certain Level Of Fee Revenue [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Business acquisition, contingent cash payment |
$ 2,000,000
|
|
Minimum [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Discount rate |
10.00%
|
10.00%
|
Minimum [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Discount rate |
10.00%
|
|
Capitalization rate |
5.00%
|
|
Minimum [Member] | Completion And Start Of Certain Developments [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Probability of occurrence of contingent consideration payment events |
92.00%
|
|
Maximum [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Discount rate |
15.00%
|
15.00%
|
Maximum [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Discount rate |
15.00%
|
|
Capitalization rate |
7.50%
|
|
Maximum [Member] | Completion And Start Of Certain Developments [Member] | Roseland Partners, L.L.C. [Member]
|
|
|
Real Estate Properties [Line Items] |
|
|
Probability of occurrence of contingent consideration payment events |
99.00%
|
|