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Earnings Per Share / Common Unit (Tables) | 6 Months Ended
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Jun. 30, 2020
Entity Information [Line Items] |
Computation Of Basic And Diluted Earnings Per Share / Unit |
| Three months ended June 30, 2020 |  |  |  |
| 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 | $ | 266,525 |  |  | 155,386 |  |  | $ | 1.72 |
Allocation of undistributed earnings to participating securities | (336) |  |  | — |  |  | (0.01) |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 266,189 |  |  | 155,386 |  |  | $ | 1.71 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 21 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 266,189 |  |  | 155,407 |  |  | $ | 1.71 |
| 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 |
| Six months ended June 30, 2020 |  |  |  |
| 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 | $ | 764,232 |  |  | 155,199 |  |  | $ | 4.92 |
Allocation of undistributed earnings to participating securities | (1,344) |  |  | — |  |  | — |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 762,888 |  |  | 155,199 |  |  | $ | 4.92 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 134 |  |  | (0.01) |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 762,888 |  |  | 155,333 |  |  | $ | 4.91 |
| 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 |
Boston Properties Limited Partnership |
Entity Information [Line Items] |
Computation Of Basic And Diluted Earnings Per Share / Unit | Included in the number of units (the denominator) below are approximately 17,273,000 and 17,647,000 redeemable common units for the three months ended June 30, 2020 and 2019, respectively, and 17,405,000 and 17,627,000 redeemable common units for the six months ended June 30, 2020 and 2019, respectively.
| Three months ended June 30, 2020 |  |  |  |
| 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 | $ | 301,975 |  |  | 172,659 |  |  | $ | 1.75 |
Allocation of undistributed earnings to participating securities | (374) |  |  | — |  |  | — |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 301,601 |  |  | 172,659 |  |  | $ | 1.75 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 21 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 301,601 |  |  | 172,680 |  |  | $ | 1.75 |
| 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 |
| Six months ended June 30, 2020 |  |  |  |
| 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 | $ | 868,308 |  |  | 172,604 |  |  | $ | 5.03 |
Allocation of undistributed earnings to participating securities | (1,495) |  |  | — |  |  | (0.01) |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 866,813 |  |  | 172,604 |  |  | $ | 5.02 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 134 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 866,813 |  |  | 172,738 |  |  | $ | 5.02 |
| 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 |

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