Quarterly report pursuant to Section 13 or 15(d)

Real Estate - Discontinued Operations (Details)

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Real Estate - Discontinued Operations (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2014
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Sep. 30, 2013
Sep. 30, 2014
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Sep. 30, 2013
Dec. 31, 2013
sqft
Sep. 30, 2013
Medical Office Porfolio [Member]
agreements
Sep. 30, 2014
Medical Office Building [Member]
Medical Office Portfolio Transactions III & IV [Member]
sqft
Sep. 30, 2014
Retail [Member]
Gateway 7-11 [Member]
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Sep. 30, 2014
Office [Member]
Atrium Building [Member]
Sep. 30, 2013
Office [Member]
Atrium Building [Member]
Sep. 30, 2014
Office [Member]
Atrium Building [Member]
Sep. 30, 2013
Office [Member]
Atrium Building [Member]
Dec. 31, 2013
Office [Member]
Atrium Building [Member]
sqft
Sep. 30, 2013
Office [Member]
Medical Office Porfolio [Member]
buildings
Sep. 30, 2014
Medical Office And Office Building [Member]
Medical Office Portfolio Transactions III & IV [Member]
Sep. 30, 2014
Medical Office And Office Building [Member]
Medical Office Porfolio [Member]
Sep. 30, 2013
Medical Office And Office Building [Member]
Medical Office Porfolio [Member]
Sep. 30, 2014
Medical Office And Office Building [Member]
Medical Office Porfolio [Member]
Sep. 30, 2013
Medical Office And Office Building [Member]
Medical Office Porfolio [Member]
Dec. 31, 2013
Medical Office And Office Building [Member]
Medical Office Portfolio Transactions I & II [Member]
sqft
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                        
Number of Purchase and Sale Agreements           4                            
Number of Buildings Sold                           2            
Rentable Square Feet 430,000   430,000   1,172,000   427,000 [1] 3,000 [2]         79,000             1,093,000 [3]
Disposal Group, Not Discontinued Operation, Sale Price               $ 1,600 [2]                        
Contract sale price 195,161   195,161   322,939   193,561 [1]           15,750   193,600 [1] 500,800   500,800   307,189 [3]
Disposal Group, including discontinued operation, gain (loss) on sale of real estate     106,555                                  
Gains (Losses) on Sales of Investment Real Estate               570 [2]                        
Gain on sale of real estate 0 0 105,985 3,195 22,144               3,195             18,949 [3]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]                                        
Real estate rental revenue 0 12,073 892 37,141                                
Real estate expenses 0 (4,398) (346) (12,856)                                
Depreciation and amortization 0 (3,215) 0 (12,161)                                
Interest expense 0 (329) 0 (985)                                
Income from operations of properties sold or held for sale $ 0 $ 4,131 $ 546 $ 11,139         $ 0 $ 0 $ 0 $ 185       $ 0 $ 4,131 $ 546 $ 10,954  
[1] Woodburn Medical Park I and II and Prosperity Medical Center I, II and III.
[2] This property is classified as continuing operations in accordance with ASU No. 2014-08 (see note 2).
[3] 2440 M Street, 15001 Shady Grove Road, 15505 Shady Grove Road, 19500 at Riverside Park (formerly Lansdowne Medical Office Building), 9707 Medical Center Drive, CentreMed I and II, 8301 Arlington Boulevard, Sterling Medical Office Building, Shady Grove Medical Village II, Alexandria Professional Center, Ashburn Farm Office Park I, Ashburn Farm Office Park II, Ashburn Farm Office Park III, Woodholme Medical Office Building, two office properties (6565 Arlington Boulevard and Woodholme Center) and undeveloped land at 4661 Kenmore Avenue