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Earnings Per Share / Common Unit (Tables) | 3 Months Ended
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Mar. 31, 2019
Entity Information [Line Items] |
Computation Of Basic And Diluted Earnings Per Share |
| Three months ended March 31, 2019
| Income (Numerator) |  | Shares (Denominator) |  | Per Share Amount
| (in thousands, except for per share amounts)
Basic Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 98,105 |  |  | 154,525 |  |  | $ | 0.63 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 319 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 98,105 |  |  | 154,844 |  |  | $ | 0.63 |
| Three months ended March 31, 2018
| Income (Numerator) |  | Shares (Denominator) |  | Per Share Amount
| (in thousands, except for per share amounts)
Basic Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 176,021 |  |  | 154,385 |  |  | $ | 1.14 |
Allocation of undistributed earnings to participating securities | (127 | ) |  | — |  |  | — |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 175,894 |  |  | 154,385 |  |  | $ | 1.14 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 320 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 175,894 |  |  | 154,705 |  |  | $ | 1.14 |
Boston Properties Limited Partnership |
Entity Information [Line Items] |
Computation Of Basic And Diluted Earnings Per Share |
| Three months ended March 31, 2019
| Income (Numerator) |  | Units (Denominator) |  | Per Unit Amount
| (in thousands, except for per unit amounts)
Basic Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 113,382 |  |  | 172,131 |  |  | $ | 0.66 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 319 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 113,382 |  |  | 172,450 |  |  | $ | 0.66 |
| Three months ended March 31, 2018
| Income (Numerator) |  | Units (Denominator) |  | Per Unit Amount
| (in thousands, except for per unit amounts)
Basic Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 200,907 |  |  | 171,867 |  |  | $ | 1.17 |
Allocation of undistributed earnings to participating securities | (141 | ) |  | — |  |  | — |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 200,766 |  |  | 171,867 |  |  | $ | 1.17 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 320 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 200,766 |  |  | 172,187 |  |  | $ | 1.17 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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