| Schedule of New Accounting Pronouncements and Changes in Accounting Principles | 
Our adoption of this guidance had the following effects on our consolidated statements of cash flows for the nine months ended September 30, 2017 (in thousands):
 
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   | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
 
Net cash provided by operating activities  | 
   | 
$  | 
170,678  | 
 
  | 
   | 
$  | 
(1,250  | 
)  | 
   | 
$  | 
169,428  | 
 
  | 
 
Net cash used in investing activities  | 
   | 
$  | 
(52,730  | 
)  | 
   | 
$  | 
260  | 
 
  | 
   | 
$  | 
(52,470  | 
)  | 
 
Net decrease in cash and cash equivalents and restricted cash  | 
   | 
$  | 
(199,005  | 
)  | 
   | 
$  | 
(990  | 
)  | 
   | 
$  | 
(199,995  | 
)  | 
 
Beginning of period cash and cash equivalents and restricted cash  | 
   | 
$  | 
209,863  | 
 
  | 
   | 
$  | 
2,756  | 
 
  | 
   | 
$  | 
212,619  | 
 
  | 
 
End of period cash and cash equivalents and restricted cash  | 
   | 
$  | 
10,858  | 
 
  | 
   | 
$  | 
1,766  | 
 
  | 
   | 
$  | 
12,624  | 
 
  | 
 
  
 
The tables below set forth the impact of the adoption of this guidance for amounts previously reported on the consolidated financial statements of COPT and subsidiaries (in thousands):
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   | 
   | 
As of December 31, 2017  | 
   | 
As of September 30, 2017  | 
   | 
As of December 31, 2016  | 
 
Consolidated Balance Sheets  | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
 
Investment in unconsolidated real estate joint venture  | 
   | 
$  | 
25,066  | 
 
  | 
   | 
$  | 
16,721  | 
 
  | 
   | 
$  | 
41,787  | 
 
  | 
   | 
$  | 
25,194  | 
 
  | 
   | 
$  | 
17,069  | 
 
  | 
   | 
$  | 
42,263  | 
 
  | 
   | 
$  | 
25,548  | 
 
  | 
   | 
$  | 
18,113  | 
 
  | 
   | 
$  | 
43,661  | 
 
  | 
 
Cumulative distributions in excess of net income  | 
   | 
$  | 
(818,190  | 
)  | 
   | 
$  | 
16,105  | 
 
  | 
   | 
$  | 
(802,085  | 
)  | 
   | 
$  | 
(800,290  | 
)  | 
   | 
$  | 
16,442  | 
 
  | 
   | 
$  | 
(783,848  | 
)  | 
   | 
$  | 
(765,276  | 
)  | 
   | 
$  | 
17,451  | 
 
  | 
   | 
$  | 
(747,825  | 
)  | 
 
Noncontrolling interests in subsidiaries  | 
   | 
$  | 
65,549  | 
 
  | 
   | 
$  | 
616  | 
 
  | 
   | 
$  | 
66,165  | 
 
  | 
   | 
$  | 
44,089  | 
 
  | 
   | 
$  | 
627  | 
 
  | 
   | 
$  | 
44,716  | 
 
  | 
   | 
$  | 
71,605  | 
 
  | 
   | 
$  | 
662  | 
 
  | 
   | 
$  | 
72,267  | 
 
  | 
 
  
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   | 
   | 
For the Three Months Ended September 30, 2017  | 
   | 
For the Nine Months Ended September 30, 2017  | 
 
Consolidated Statements of Operations and Comprehensive Income  | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
 
Equity in income of unconsolidated entities  | 
   | 
$  | 
719  | 
 
  | 
   | 
$  | 
(348  | 
)  | 
   | 
$  | 
371  | 
 
  | 
   | 
$  | 
2,162  | 
 
  | 
   | 
$  | 
(1,044  | 
)  | 
   | 
$  | 
1,118  | 
 
  | 
 
Net income   | 
   | 
$  | 
22,682  | 
 
  | 
   | 
$  | 
(348  | 
)  | 
   | 
$  | 
22,334  | 
 
  | 
   | 
$  | 
64,977  | 
 
  | 
   | 
$  | 
(1,044  | 
)  | 
   | 
$  | 
63,933  | 
 
  | 
 
Net income attributable to noncontrolling interests - Common units in COPLP  | 
   | 
$  | 
(704  | 
)  | 
   | 
$  | 
11  | 
 
  | 
   | 
$  | 
(693  | 
)  | 
   | 
$  | 
(1,611  | 
)  | 
   | 
$  | 
35  | 
 
  | 
   | 
$  | 
(1,576  | 
)  | 
 
Net income attributable to COPT  | 
   | 
$  | 
20,916  | 
 
  | 
   | 
$  | 
(337  | 
)  | 
   | 
$  | 
20,579  | 
 
  | 
   | 
$  | 
60,133  | 
 
  | 
   | 
$  | 
(1,009  | 
)  | 
   | 
$  | 
59,124  | 
 
  | 
 
Net income attributable to COPT common shareholders  | 
   | 
$  | 
20,916  | 
 
  | 
   | 
$  | 
(337  | 
)  | 
   | 
$  | 
20,579  | 
 
  | 
   | 
$  | 
47,067  | 
 
  | 
   | 
$  | 
(1,009  | 
)  | 
   | 
$  | 
46,058  | 
 
  | 
 
Earnings per common share - basic and diluted  | 
   | 
$  | 
0.21  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
0.21  | 
 
  | 
   | 
$  | 
0.47  | 
 
  | 
   | 
$  | 
(0.01  | 
)  | 
   | 
$  | 
0.46  | 
 
  | 
 
Comprehensive income  | 
   | 
$  | 
22,996  | 
 
  | 
   | 
$  | 
(348  | 
)  | 
   | 
$  | 
22,648  | 
 
  | 
   | 
$  | 
65,879  | 
 
  | 
   | 
$  | 
(1,044  | 
)  | 
   | 
$  | 
64,835  | 
 
  | 
 
Comprehensive income attributable to COPT  | 
   | 
$  | 
21,220  | 
 
  | 
   | 
$  | 
(337  | 
)  | 
   | 
$  | 
20,883  | 
 
  | 
   | 
$  | 
61,005  | 
 
  | 
   | 
$  | 
(1,009  | 
)  | 
   | 
$  | 
59,996  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
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   | 
 
  
 
The tables below set forth the impact of the adoption of this guidance for amounts previously reported on the consolidated financial statements of COPLP and subsidiaries (in thousands):
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   | 
   | 
As of December 31, 2017  | 
   | 
As of September 30, 2017  | 
   | 
As of December 31, 2016  | 
 
Consolidated Balance Sheets  | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
 
Investment in unconsolid. real estate joint venture  | 
   | 
$  | 
25,066  | 
 
  | 
   | 
$  | 
16,721  | 
 
  | 
   | 
$  | 
41,787  | 
 
  | 
   | 
$  | 
25,194  | 
 
  | 
   | 
$  | 
17,069  | 
 
  | 
   | 
$  | 
42,263  | 
 
  | 
   | 
$  | 
25,548  | 
 
  | 
   | 
$  | 
18,113  | 
 
  | 
   | 
$  | 
43,661  | 
 
  | 
 
Common units  | 
   | 
$  | 
1,428,301  | 
 
  | 
   | 
$  | 
16,721  | 
 
  | 
   | 
$  | 
1,445,022  | 
 
  | 
   | 
$  | 
1,394,911  | 
 
  | 
   | 
$  | 
17,069  | 
 
  | 
   | 
$  | 
1,411,980  | 
 
  | 
   | 
$  | 
1,401,597  | 
 
  | 
   | 
$  | 
18,113  | 
 
  | 
   | 
$  | 
1,419,710  | 
 
  | 
 
  
 
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   | 
   | 
For the Three Months Ended September 30, 2017  | 
   | 
For the Nine Months Ended September 30, 2017  | 
 
Consolidated Statements of Operations and Comprehensive Income  | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
   | 
As Previously Reported  | 
   | 
Impact of Adoption  | 
   | 
As  Adjusted  | 
 
Equity in income of unconsolidated entities  | 
   | 
$  | 
719  | 
 
  | 
   | 
$  | 
(348  | 
)  | 
   | 
$  | 
371  | 
 
  | 
   | 
$  | 
2,162  | 
 
  | 
   | 
$  | 
(1,044  | 
)  | 
   | 
$  | 
1,118  | 
 
  | 
 
Net income   | 
   | 
$  | 
22,682  | 
 
  | 
   | 
$  | 
(348  | 
)  | 
   | 
$  | 
22,334  | 
 
  | 
   | 
$  | 
64,977  | 
 
  | 
   | 
$  | 
(1,044  | 
)  | 
   | 
$  | 
63,933  | 
 
  | 
 
Net income attributable to COPLP  | 
   | 
$  | 
21,785  | 
 
  | 
   | 
$  | 
(348  | 
)  | 
   | 
$  | 
21,437  | 
 
  | 
   | 
$  | 
62,239  | 
 
  | 
   | 
$  | 
(1,044  | 
)  | 
   | 
$  | 
61,195  | 
 
  | 
 
Net income attributable to COPLP common unitholders  | 
   | 
$  | 
21,620  | 
 
  | 
   | 
$  | 
(348  | 
)  | 
   | 
$  | 
21,272  | 
 
  | 
   | 
$  | 
48,678  | 
 
  | 
   | 
$  | 
(1,044  | 
)  | 
   | 
$  | 
47,634  | 
 
  | 
 
Earnings per common unit - basic and diluted  | 
   | 
$  | 
0.21  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
0.21  | 
 
  | 
   | 
$  | 
0.47  | 
 
  | 
   | 
$  | 
(0.01  | 
)  | 
   | 
$  | 
0.46  | 
 
  | 
 
Comprehensive income  | 
   | 
$  | 
22,996  | 
 
  | 
   | 
$  | 
(348  | 
)  | 
   | 
$  | 
22,648  | 
 
  | 
   | 
$  | 
65,879  | 
 
  | 
   | 
$  | 
(1,044  | 
)  | 
   | 
$  | 
64,835  | 
 
  | 
 
Comprehensive income attributable to COPLP  | 
   | 
$  | 
22,099  | 
 
  | 
   | 
$  | 
(348  | 
)  | 
   | 
$  | 
21,751  | 
 
  | 
   | 
$  | 
63,141  | 
 
  | 
   | 
$  | 
(1,044  | 
)  | 
   | 
$  | 
62,097  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
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   | 
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