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Earnings Per Share / Common Unit (Tables) | 9 Months Ended
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Sep. 30, 2019
Entity Information [Line Items] |
Computation Of Basic And Diluted Earnings Per Share |
| Three months ended September 30, 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 | $ | 107,771 |  |  | 154,577 |  |  | $ | 0.70 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 243 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 107,771 |  |  | 154,820 |  |  | $ | 0.70 |
| Three months ended September 30, 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 | $ | 119,118 |  |  | 154,440 |  |  | $ | 0.77 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 238 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 119,118 |  |  | 154,678 |  |  | $ | 0.77 |
| Nine months ended September 30, 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 | $ | 370,200 |  |  | 154,553 |  |  | $ | 2.40 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 294 |  |  | (0.01 | )
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 370,200 |  |  | 154,847 |  |  | $ | 2.39 |
| Nine months ended September 30, 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 | $ | 423,835 |  |  | 154,414 |  |  | $ | 2.74 |
Allocation of undistributed earnings to participating securities | (87 | ) |  | — |  |  | — |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 423,748 |  |  | 154,414 |  |  | $ | 2.74 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 238 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 423,748 |  |  | 154,652 |  |  | $ | 2.74 |
Boston Properties Limited Partnership |
Entity Information [Line Items] |
Computation Of Basic And Diluted Earnings Per Share |
| Three months ended September 30, 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 | $ | 122,117 |  |  | 172,215 |  |  | $ | 0.71 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 243 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 122,117 |  |  | 172,458 |  |  | $ | 0.71 |
| Three months ended September 30, 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 | $ | 136,201 |  |  | 171,928 |  |  | $ | 0.79 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 238 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 136,201 |  |  | 172,166 |  |  | $ | 0.79 |
| Nine months ended September 30, 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 | $ | 421,214 |  |  | 172,183 |  |  | $ | 2.45 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 294 |  |  | (0.01 | )
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 421,214 |  |  | 172,477 |  |  | $ | 2.44 |
| Nine months ended September 30, 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 | $ | 483,069 |  |  | 171,904 |  |  | $ | 2.81 |
Allocation of undistributed earnings to participating securities | (97 | ) |  | — |  |  | — |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 482,972 |  |  | 171,904 |  |  | $ | 2.81 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 238 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 482,972 |  |  | 172,142 |  |  | $ | 2.81 |

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