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Earnings Per Share / Common Unit (Tables) | 12 Months Ended
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Dec. 31, 2018
Entity Information [Line Items] |
Computation Of Basic And Diluted Earnings Per Share / Unit |
| For the Year Ended December 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 | $ | 572,347 |  |  | 154,427 |  |  | $ | 3.71 |
Allocation of undistributed earnings to participating securities | (101 | ) |  | — |  |  | — |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 572,246 |  |  | 154,427 |  |  | $ | 3.71 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 255 |  |  | (0.01 | )
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 572,246 |  |  | 154,682 |  |  | $ | 3.70 |
| For the Year Ended December 31, 2017
| 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 | $ | 451,939 |  |  | 154,190 |  |  | $ | 2.93 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 200 |  |  | — |
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 451,939 |  |  | 154,390 |  |  | $ | 2.93 |
| For the Year Ended December 31, 2016
| 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 | $ | 502,285 |  |  | 153,715 |  |  | $ | 3.27 |
Allocation of undistributed earnings to participating securities | (283 | ) |  | — |  |  | — |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 502,002 |  |  | 153,715 |  |  | $ | 3.27 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 262 |  |  | (0.01 | )
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties, Inc. common shareholders | $ | 502,002 |  |  | 153,977 |  |  | $ | 3.26 |
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 17,485,000, 17,471,000 and 17,646,000 redeemable common units for the years ended December 31, 2018, 2017 and 2016, respectively.
| For the Year Ended December 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 | $ | 656,903 |  |  | 171,912 |  |  | $ | 3.82 |
Allocation of undistributed earnings to participating securities | (113 | ) |  | — |  |  | — |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 656,790 |  |  | 171,912 |  |  | $ | 3.82 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 255 |  |  | (0.01 | )
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 656,790 |  |  | 172,167 |  |  | $ | 3.81 |
| For the Year Ended December 31, 2017
| 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 | $ | 512,866 |  |  | 171,661 |  |  | $ | 2.99 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 200 |  |  | (0.01 | )
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 512,866 |  |  | 171,861 |  |  | $ | 2.98 |
| For the Year Ended December 31, 2016
| 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 | $ | 575,341 |  |  | 171,361 |  |  | $ | 3.36 |
Allocation of undistributed earnings to participating securities | (316 | ) |  | — |  |  | — |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 575,025 |  |  | 171,361 |  |  | $ | 3.36 |
Effect of Dilutive Securities: |  |  |  |  |
Stock Based Compensation | — |  |  | 262 |  |  | (0.01 | )
Diluted Earnings: |  |  |  |  |
Net income attributable to Boston Properties Limited Partnership common unitholders | $ | 575,025 |  |  | 171,623 |  |  | $ | 3.35 |

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