Annual report pursuant to Section 13 and 15(d)

Discontinued Operations (Details)

v2.4.0.8
Discontinued Operations (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Assets Held-for-sale
Sep. 29, 2011
Towson Portfolio
Property
Dec. 15, 2011
Rutherford Business Center Portfolio
Property
Jan. 30, 2012
White Marsh Portfolio Disposition Property
Property
Jul. 24, 2012
July 2012 Portfolio Disposition
Property
Dec. 12, 2013
December 2013 Colorado Springs Portfolio Disposition
Property
Dec. 23, 2013
Baltimore and Washington Corridor
Property
Dec. 23, 2013
Colorado Springs
Property
Properties                                      
Number of properties sold                         4 13 5 23 15    
Number of properties transferred                                   9 5
Revenue from real estate operations                 $ 37,636 $ 58,801 $ 87,221                
Property operating expenses                 (13,505) (21,529) (33,445)                
Depreciation and amortization                 (4,505) (13,939) (27,128)                
Impairment losses                 (26,190) (23,232) (67,808)                
General, administrative and leasing expenses                 (4) (3) (20)                
Business development and land carry costs                 0 (24) (75)                
Interest expense                 (8,221) (10,397) (14,264)                
Gain on sales of real estate                 2,671 20,940 4,796                
Gain (loss) on early extinguishment of debt                 67,810 1,736 (384)                
Discontinued operations 71,907 (12,974) (4,502) 1,261 2,515 11,283 1,504 (2,949) 55,692 12,353 (51,107)                
Properties, net 3,214,301       3,163,044       3,214,301 3,163,044   128,740              
Deferred rent receivable (net of allowance of $2,126 and $913, respectively) 89,456       85,802       89,456 85,802   4,068              
Intangible assets on real estate acquisitions, net 59,258       75,879       59,258 75,879   4,409              
Deferred leasing costs, net                       2,923              
Lease incentives 8,435       5,578       8,435 5,578   89              
Assets held for sale, net $ 0       $ 140,229       $ 0 $ 140,229   $ 140,229