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Earnings Per Share / Common Unit (Tables) | 6 Months Ended
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Jun. 30, 2019
Entity Information [Line Items] |
Computation Of Basic And Diluted Earnings Per Share |
| Three months ended June 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 | $ | 164,318 |  |  | 154,555 |  |  | $ | 1.06 |
Allocation of undistributed earnings to participating securities | (48 | ) |  | — |  |  | — |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 164,270 |  |  | 154,555 |  |  | $ | 1.06 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 319 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 164,270 |  |  | 154,874 |  |  | $ | 1.06 |
| Three months ended June 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 | $ | 128,681 |  |  | 154,415 |  |  | $ | 0.83 |
Allocation of undistributed earnings to participating securities | (16 | ) |  | — |  |  | — |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 128,665 |  |  | 154,415 |  |  | $ | 0.83 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 156 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 128,665 |  |  | 154,571 |  |  | $ | 0.83 |
| Six months ended June 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 | $ | 262,431 |  |  | 154,540 |  |  | $ | 1.70 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 319 |  |  | (0.01 | )
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 262,431 |  |  | 154,859 |  |  | $ | 1.69 |
| Six months ended June 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 | $ | 304,682 |  |  | 154,400 |  |  | $ | 1.97 |
Allocation of undistributed earnings to participating securities | (142 | ) |  | — |  |  | — |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 304,540 |  |  | 154,400 |  |  | $ | 1.97 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 238 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 304,540 |  |  | 154,638 |  |  | $ | 1.97 |
Boston Properties Limited Partnership |
Entity Information [Line Items] |
Computation Of Basic And Diluted Earnings Per Share |
| Three months ended June 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 | $ | 185,715 |  |  | 172,202 |  |  | $ | 1.08 |
Allocation of undistributed earnings to participating securities | (54 | ) |  | — |  |  | — |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 185,661 |  |  | 172,202 |  |  | $ | 1.08 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 319 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 185,661 |  |  | 172,521 |  |  | $ | 1.08 |
| Three months ended June 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 | $ | 145,961 |  |  | 171,916 |  |  | $ | 0.85 |
Allocation of undistributed earnings to participating securities | (18 | ) |  | — |  |  | — |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 145,943 |  |  | 171,916 |  |  | $ | 0.85 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 156 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 145,943 |  |  | 172,072 |  |  | $ | 0.85 |
| Six months ended June 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 | $ | 299,097 |  |  | 172,167 |  |  | $ | 1.74 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 319 |  |  | (0.01 | )
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 299,097 |  |  | 172,486 |  |  | $ | 1.73 |
| Six months ended June 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 | $ | 346,868 |  |  | 171,892 |  |  | $ | 2.02 |
Allocation of undistributed earnings to participating securities | (158 | ) |  | — |  |  | — |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 346,710 |  |  | 171,892 |  |  | $ | 2.02 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 238 |  |  | (0.01 | )
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 346,710 |  |  | 172,130 |  |  | $ | 2.01 |

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