Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies 2 (Details)

v2.4.0.8
Summary of Significant Accounting Policies 2 (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Redeemable noncontrolling interest $ 15,571 $ 9,578 $ 15,571 $ 9,578 $ 10,298  
Additional paid-in capital 1,772,470 1,447,781 1,772,470 1,447,781 1,653,672  
Cumulative distributions in excess of net income (668,892) (560,262) (668,892) (560,262) (617,455)  
Noncontrolling interests in common units in COPLP 49,112 52,300 49,112 52,300 52,122  
Noncontrolling interests in other consolidated entities 11,225 9,315 11,225 9,315 10,153  
Total equity 1,426,287 1,343,771 1,426,287 1,343,771 1,436,499 1,205,899
Total liabilities, redeemable noncontrolling interest and equity 3,699,635 3,715,075 3,699,635 3,715,075 3,653,759  
Total revenues 140,524 127,664 271,144 259,398    
Expenses            
Property operating expenses 43,408 39,441 85,927 80,628    
Depreciation and amortization associated with real estate operations 28,866 28,295 57,029 56,029    
Construction contract and other service expenses 19,382 16,285 32,859 36,892    
Impairment recoveries 0 0 0 (4,836)    
General, administrative and leasing expenses   8,851   18,420    
Business development expenses and land carry costs 1,327 1,298 2,686 2,874    
Total operating expenses 99,566 94,170 192,904 190,007    
Operating income 40,958 33,494 78,240 69,391    
Interest expense (23,302) (24,239) (45,609) (48,670)    
Income tax expense (21) (17) (37) (221)    
Income from continuing operations (1,703) 9,722 9,059 22,112    
Discontinued operations (3,031) 2,118 (870) (37)    
Net income (4,405) 11,861 10,872 22,096    
Net income attributable to noncontrolling interests in common units in COPLP 671 (422) 242 (795)    
Net income attributable to noncontrolling interests in other consolidated entities (1,466) 31 (1,129) 629    
Net income attributable to Corporate Office Properties Trust (5,365) 11,305 9,655 21,600    
Basic and diluted earnings per common share:            
Income from continuing operations (in dollars per share)   $ 0.07   $ 0.18    
Income from discontinued operations (in dollars per share)   $ 0.03   $ 0.00    
Net income attributable to COPT common shareholders (in dollars per share)   $ 0.10   $ 0.18    
Scenario, Previously Reported
            
Redeemable noncontrolling interest   0   0    
Additional paid-in capital   1,450,923   1,450,923    
Cumulative distributions in excess of net income   (562,678)   (562,678)    
Noncontrolling interests in common units in COPLP   52,152   52,152    
Noncontrolling interests in other consolidated entities   18,315   18,315    
Total equity   1,353,349   1,353,349    
Total liabilities, redeemable noncontrolling interest and equity   3,715,075   3,715,075    
Total revenues   133,386   270,996    
Expenses            
Property operating expenses   42,384   87,301    
Depreciation and amortization associated with real estate operations   29,853   59,172    
Construction contract and other service expenses   16,285   36,892    
Impairment recoveries       (2,303)    
General, administrative and leasing expenses   7,742   14,759    
Business development expenses and land carry costs   1,298   2,874    
Total operating expenses   97,562   198,695    
Operating income   35,824   72,301    
Interest expense   (24,747)   (49,667)    
Income tax expense   (17)   (4,190)    
Income from continuing operations   11,544   20,056    
Discontinued operations   296   (1,239)    
Net income   11,861   18,838    
Net income attributable to noncontrolling interests in common units in COPLP   (390)   (549)    
Net income attributable to noncontrolling interests in other consolidated entities   (552)   (528)    
Net income attributable to Corporate Office Properties Trust   10,754   17,431    
Basic and diluted earnings per common share:            
Income from continuing operations (in dollars per share)   $ 0.09   $ 0.14    
Income from discontinued operations (in dollars per share)       $ (0.01)    
Net income attributable to COPT common shareholders (in dollars per share)   $ 0.09   $ 0.13    
Change
            
Redeemable noncontrolling interest   9,578   9,578    
Additional paid-in capital   (3,142)   (3,142)    
Cumulative distributions in excess of net income   2,416   2,416    
Noncontrolling interests in common units in COPLP   148   148    
Noncontrolling interests in other consolidated entities   (9,000)   (9,000)    
Total equity   (9,578)   (9,578)    
Total revenues   (5,722)   (11,598)    
Expenses            
Property operating expenses   (2,943)   (6,673)    
Depreciation and amortization associated with real estate operations   (1,558)   (3,143)    
Impairment recoveries       (2,533)    
General, administrative and leasing expenses   1,109   3,661    
Total operating expenses   (3,392)   (8,688)    
Operating income   (2,330)   (2,910)    
Interest expense   508   997    
Income tax expense       3,969    
Income from continuing operations   (1,822)   2,056    
Discontinued operations   1,822   1,202    
Net income       3,258    
Net income attributable to noncontrolling interests in common units in COPLP   (32)   (246)    
Net income attributable to noncontrolling interests in other consolidated entities   583   1,157    
Net income attributable to Corporate Office Properties Trust   551   4,169    
Basic and diluted earnings per common share:            
Income from continuing operations (in dollars per share)   $ (0.02)   $ 0.04    
Income from discontinued operations (in dollars per share)   $ 0.03   $ 0.01    
Net income attributable to COPT common shareholders (in dollars per share)   $ 0.01   $ 0.05    
Revisions
            
Redeemable noncontrolling interest   9,578   9,578    
Additional paid-in capital   (3,142)   (3,142)    
Cumulative distributions in excess of net income   2,416   2,416    
Noncontrolling interests in common units in COPLP   148   148    
Noncontrolling interests in other consolidated entities   (9,000)   (9,000)    
Total equity   (9,578)   (9,578)    
Continuing Operations | Reclassifications
            
Expenses            
Property operating expenses   (1,110)   (2,951)    
General, administrative and leasing expenses   1,110   2,951    
Continuing Operations | Revisions
            
Expenses            
General, administrative and leasing expenses       711    
Total operating expenses       711    
Operating income       (711)    
Income tax expense       3,969    
Income from continuing operations       3,258    
Net income       3,258    
Net income attributable to noncontrolling interests in common units in COPLP   (32)   (246)    
Net income attributable to noncontrolling interests in other consolidated entities   583   1,157    
Net income attributable to Corporate Office Properties Trust   551   4,169    
Basic and diluted earnings per common share:            
Income from continuing operations (in dollars per share)   $ 0.01   $ 0.05    
Net income attributable to COPT common shareholders (in dollars per share)   $ 0.01   $ 0.05    
Discontinued Operations | Reclassifications
            
Total revenues   (5,722)   (11,598)    
Expenses            
Property operating expenses   (1,833)   (3,722)    
Depreciation and amortization associated with real estate operations   (1,558)   (3,143)    
Impairment recoveries       (2,533)    
General, administrative and leasing expenses   (1)   (1)    
Total operating expenses   (3,392)   (9,399)    
Operating income   (2,330)   (2,199)    
Interest expense   508   997    
Income from continuing operations   (1,822)   (1,202)    
Discontinued operations   $ 1,822   $ 1,202    
Basic and diluted earnings per common share:            
Income from continuing operations (in dollars per share)   $ (0.03)   $ (0.01)    
Income from discontinued operations (in dollars per share)   $ 0.03   $ 0.01