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 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Redeemable noncontrolling interest $ 16,789 $ 9,932 $ 16,789 $ 9,932 $ 10,298  
Additional paid-in capital 1,812,801 1,451,416 1,812,801 1,451,416 1,653,672  
Cumulative distributions in excess of net income (700,368) (607,633) (700,368) (607,633) (617,455)  
Noncontrolling interests in common units in COPLP 50,815 49,157 50,815 49,157 52,122  
Noncontrolling interests in other consolidated entities 9,137 9,682 9,137 9,682 10,153  
Total equity 1,434,067 1,240,289 1,434,067 1,240,289 1,436,499 1,205,899
Total liabilities, redeemable noncontrolling interest and equity 3,755,588 3,597,656 3,755,588 3,597,656 3,653,759  
Total revenues 136,031 129,645 407,175 389,043    
Expenses            
Property operating expenses 43,482 41,474 129,409 122,102    
Depreciation and amortization associated with real estate operations 29,210 28,604 86,239 84,633    
Construction contract and other service expenses 16,306 14,410 49,165 51,302    
Impairment losses 16,300 46,096 16,300 41,260    
General, administrative and leasing expenses   6,377   24,797    
Business development expenses and land carry costs 1,383 1,632 4,069 4,506    
Total operating expenses 114,708 138,593 307,612 328,600    
Operating income (loss) 21,323 (8,948) 99,563 60,443    
Interest expense (21,242) (23,239) (66,851) (71,909)    
Income tax expense (24) (106) (61) (327)    
Loss from continuing operations (276) (32,212) 8,783 (10,100)    
Discontinued operations (1,724) 11,447 (2,594) 11,410    
Net (loss) income (2,000) (20,765) 8,872 1,331    
Net loss attributable to noncontrolling interests in common units in COPLP 232 1,533 474 738    
Net loss attributable to noncontrolling interests in other consolidated entities (1,031) 235 (2,160) 864    
Net loss attributable to COPT (2,964) (19,162) 6,691 2,438    
Basic and diluted earnings per common share:            
Income from continuing operations (in dollars per share)   $ (0.54)   $ (0.35)    
Income from discontinued operations (in dollars per share)   $ 0.15   $ 0.15    
Net income attributable to COPT common shareholders (in dollars per share)   $ (0.39)   $ (0.20)    
Scenario, Previously Reported
            
Redeemable noncontrolling interest   0   0    
Additional paid-in capital   1,455,558   1,455,558    
Cumulative distributions in excess of net income   (610,659)   (610,659)    
Noncontrolling interests in common units in COPLP   48,973   48,973    
Noncontrolling interests in other consolidated entities   18,682   18,682    
Total equity   1,250,221   1,250,221    
Total liabilities, redeemable noncontrolling interest and equity   3,597,656   3,597,656    
Total revenues   130,144   390,499    
Expenses            
Property operating expenses   42,799   126,339    
Depreciation and amortization associated with real estate operations   28,698   84,920    
Construction contract and other service expenses   14,410   51,302    
Impairment losses   46,096   41,260    
General, administrative and leasing expenses   5,061   19,820    
Business development expenses and land carry costs   1,632   4,506    
Total operating expenses   138,696   328,147    
Operating income (loss)   (8,552)   62,352    
Interest expense   (23,239)   (71,909)    
Income tax expense   (106)   (4,296)    
Loss from continuing operations   (31,816)   (12,160)    
Discontinued operations   11,051   10,212    
Net (loss) income   (20,765)   (1,927)    
Net loss attributable to noncontrolling interests in common units in COPLP   1,569   1,020    
Net loss attributable to noncontrolling interests in other consolidated entities   (411)   (939)    
Net loss attributable to COPT   (19,772)   (2,341)    
Basic and diluted earnings per common share:            
Income from continuing operations (in dollars per share)   $ (0.54)   $ (0.40)    
Income from discontinued operations (in dollars per share)   $ 0.15   $ 0.13    
Net income attributable to COPT common shareholders (in dollars per share)   $ (0.39)   $ (0.27)    
Change
            
Redeemable noncontrolling interest   9,932   9,932    
Additional paid-in capital   (4,142)   (4,142)    
Cumulative distributions in excess of net income   3,026   3,026    
Noncontrolling interests in common units in COPLP   184   184    
Noncontrolling interests in other consolidated entities   (9,000)   (9,000)    
Total equity   (9,932)   (9,932)    
Total revenues   (499)   (1,456)    
Expenses            
Property operating expenses   (1,325)   (4,237)    
Depreciation and amortization associated with real estate operations   (94)   (287)    
General, administrative and leasing expenses   1,316   4,977    
Total operating expenses   (103)   453    
Operating income (loss)   (396)   (1,909)    
Income tax expense       3,969    
Loss from continuing operations   (396)   2,060    
Discontinued operations   396   1,198    
Net (loss) income       3,258    
Net loss attributable to noncontrolling interests in common units in COPLP   (36)   (282)    
Net loss attributable to noncontrolling interests in other consolidated entities   646   1,803    
Net loss attributable to COPT   610   4,779    
Basic and diluted earnings per common share:            
Income from continuing operations (in dollars per share)       $ 0.05    
Income from discontinued operations (in dollars per share)       $ 0.02    
Net income attributable to COPT common shareholders (in dollars per share)       $ 0.07    
Revisions
            
Redeemable noncontrolling interest   9,932   9,932    
Additional paid-in capital   (4,142)   (4,142)    
Cumulative distributions in excess of net income   3,026   3,026    
Noncontrolling interests in common units in COPLP   184   184    
Noncontrolling interests in other consolidated entities   (9,000)   (9,000)    
Total equity   (9,932)   (9,932)    
Continuing Operations | Reclassifications
            
Expenses            
Property operating expenses   (1,316)   (4,269)    
General, administrative and leasing expenses   1,316   4,269    
Continuing Operations | Revisions
            
Expenses            
General, administrative and leasing expenses       711    
Total operating expenses       711    
Operating income (loss)       (711)    
Income tax expense       3,969    
Loss from continuing operations       3,258    
Net (loss) income       3,258    
Net loss attributable to noncontrolling interests in common units in COPLP   (36)   (282)    
Net loss attributable to noncontrolling interests in other consolidated entities   646   1,803    
Net loss attributable to COPT   610   4,779    
Basic and diluted earnings per common share:            
Income from continuing operations (in dollars per share)       $ 0.07    
Net income attributable to COPT common shareholders (in dollars per share)       $ 0.07    
Discontinued Operations | Reclassifications
            
Total revenues   (499)   (1,456)    
Expenses            
Property operating expenses   (9)   32    
Depreciation and amortization associated with real estate operations   (94)   (287)    
General, administrative and leasing expenses       (3)    
Total operating expenses   (103)   (258)    
Operating income (loss)   (396)   (1,198)    
Loss from continuing operations   (396)   (1,198)    
Discontinued operations   $ 396   $ 1,198    
Basic and diluted earnings per common share:            
Income from continuing operations (in dollars per share)       $ (0.02)    
Income from discontinued operations (in dollars per share)       $ 0.02