Quarterly report pursuant to Section 13 or 15(d)

Real Estate - Acquisitions (Details)

v2.4.0.8
Real Estate - Acquisitions (Details) (USD $)
3 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
note
Sep. 30, 2013
Dec. 31, 2013
Sep. 30, 2014
Tenant Origination Costs Member
Sep. 30, 2014
Leasing Commissions Absorption Costs Member
Sep. 30, 2014
Net Lease Intangible Assets Member
Sep. 30, 2014
Net Lease Intangible Liabilities Member
Sep. 30, 2014
Pro Forma [Member]
Sep. 30, 2013
Pro Forma [Member]
Sep. 30, 2014
Pro Forma [Member]
Sep. 30, 2013
Pro Forma [Member]
Sep. 30, 2014
Property Acquired [Member]
Sep. 30, 2014
Property Acquired [Member]
sqft
Sep. 30, 2014
Property Acquired [Member]
Yale West
Dec. 31, 2013
Property Acquired [Member]
Yale West
Sep. 30, 2014
Property Acquired [Member]
The Army Navy Club Building
sqft
Sep. 30, 2014
Property Acquired [Member]
1775 Eye Street [Member]
sqft
Real Estate Properties [Line Items]                                      
SEC Schedule III, Real Estate and Accumulated Depreciation, Date Acquired                               Feb. 21, 2014   Mar. 26, 2014 May 01, 2014
Real Estate, Type of Property, Multifamily                               Multifamily      
Real Estate, Type of Property, Office                                   Office Office
Square Footage Of Real Estate Property Acquired                             293,000     108,000 185,000
Real Estate Investment Property, at Cost $ 2,387,611,000   $ 2,387,611,000   $ 2,102,227,000                 $ 256,500,000 $ 256,500,000 $ 73,000,000   $ 79,000,000 $ 104,500,000
Real estate rental revenue 73,413,000 65,828,000 214,278,000 196,303,000           73,413,000 71,004,000 219,192,000 211,662,000 5,089,000 10,444,000        
Net Investment Income                           (640,000) (2,752,000)        
Payments to Acquire Land Held-for-use     93,567,000                                
Payments to Acquire Buildings     141,456,000                                
Tenant origination costs 8,354,000   8,354,000                                
Leasing commissions absorption costs 12,847,000   12,847,000                                
Net lease intangible assets 7,331,000   7,331,000                                
Net lease intangible liabilities (2,122,000)   (2,122,000)                                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt (107,125,000)   (107,125,000)                                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 932,000   932,000                                
Total property purchase price     155,240,000                                
Weighted Average Useful Life           71 months 54 months 72 months 82 months                    
Payments to Acquire Real Estate     154,126,000 0                              
Number of Mortgage Notes Assumed     2                                
Notes Assumed     100,900,000                                
Payments for Escrow Deposit                                 3,600,000   1,900,000
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest 3,658,000 1,709,000 2,761,000 4,104,000           3,668,000 477,000 1,960,000 449,000            
Net income attributable to the controlling interests $ 3,668,000 $ 5,840,000 $ 109,309,000 $ 18,438,000           $ 3,668,000 $ 4,608,000 $ 108,492,000 $ 14,783,000            
Diluted Earnings Per Share Pro Forma                   $ 0.05 $ 0.07 $ 1.62 $ 0.22