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v3.6.0.2

Properties, net (Details 5) $ / shares in Units, ft² in Thousands, $ in Thousands |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 07, 2015 USD ($) ft² | Apr. 15, 2015 USD ($) ft² | Mar. 19, 2015 USD ($) ft² | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) $ / shares | Dec. 31, 2014 USD ($) $ / shares
Business Combination |  |  |  |  |  |
Weighted average amortization period of intangible assets |  |  |  | 11 years |  |
Pro Forma Information |  |  |  |  |  |
Pro forma total revenues |  |  |  |  | $ 641,982 | $ 623,013
Pro forma net income attributable to COPT common shareholders |  |  |  |  | $ 167,079 | $ 20,796
Basic (in dollars per share) | $ / shares |  |  |  |  | $ 1.77 | $ 0.23
Diluted (in dollars per share) | $ / shares |  |  |  |  | $ 1.77 | $ 0.23
Tenant relationship value [Member] |  |  |  |  |  |
Business Combination |  |  |  |  |  |
Weighted average amortization period of intangible assets |  |  |  | 10 years |  |
Below-market cost arrangements [Member] |  |  |  |  |  |
Business Combination |  |  |  |  |  |
Weighted average amortization period of intangible assets |  |  |  | 35 years |  |
250 W Pratt St [Member] | Baltimore, Maryland [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Square footage of real estate properties (in square feet) | ft² |  |  | 367 |  |  |
Acquired property percentage leased |  |  | 96.20% |  |  |
Purchase price |  |  | $ 61,800 |  |  |
2600 Park Tower Drive [Member] | Vienna, Virginia [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Square footage of real estate properties (in square feet) | ft² |  | 237 |  |  |  |
Acquired property percentage leased |  | 100.00% |  |  |  |
Purchase price |  | $ 80,500 |  |  |  |
100 and 30 Light Street [Member] | Baltimore, Maryland [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Square footage of real estate properties (in square feet) | ft² | 558 |  |  |  |  |
Acquired property percentage leased | 93.50% |  |  |  |  |
Purchase price | $ 121,200 |  |  |  |  |
Liabilities incurred | 55,000 |  |  |  |  |
Fair value assumption of debt | $ 55,500 |  |  |  |  |
2015 Property Acquisitions [Member] |  |  |  |  |  |
Business Combination |  |  |  |  |  |
Land, operating properties |  |  |  |  | $ 55,076 |
Building and improvements |  |  |  |  | 139,540 |
Intangible assets on real estate acquisitions |  |  |  |  | 75,729 |
Total assets |  |  |  |  | 270,345 |
Below-market leases |  |  |  |  | (6,808) |
Total acquisition cost |  |  |  |  | 263,537 |
Finite-lived intangible assets acquired |  |  |  |  | $ 75,729 |
Weighted average amortization period of intangible assets |  |  |  |  | 10 years |
Contributed revenues |  |  |  | $ 36,900 | $ 20,200 |
Net income from continuing operations since acquisition date |  |  |  | $ 2,200 | 1,200 |
Acquisition related costs |  |  |  |  | 4,100 |
2015 Property Acquisitions [Member] | Tenant relationship value [Member] |  |  |  |  |  |
Business Combination |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  | $ 31,183 |
Weighted average amortization period of intangible assets |  |  |  |  | 12 years |
2015 Property Acquisitions [Member] | In-place lease value [Member] |  |  |  |  |  |
Business Combination |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  | $ 35,139 |
Weighted average amortization period of intangible assets |  |  |  |  | 7 years |
2015 Property Acquisitions [Member] | Above-market leases [Member] |  |  |  |  |  |
Business Combination |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  | $ 6,720 |
Weighted average amortization period of intangible assets |  |  |  |  | 4 years |
2015 Property Acquisitions [Member] | Below-market cost arrangements [Member] |  |  |  |  |  |
Business Combination |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  | $ 2,687 |
Weighted average amortization period of intangible assets |  |  |  |  | 40 years |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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- Definition Amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of real estate acquired, at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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