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Earnings Per Share / Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Basic Earnings: |  |
Net income attributable to the company's common shareholders / unitholders | $ 91,624 | $ 497,496
Net income attributable to the company's common shareholders / unitholders (in shares / units) | 155,928,000 | 155,011,000
Net income attributable to the company's common shareholders / unitholders (in dollars per share / unit) | $ 0.59 | $ 3.21
Allocation of undistributed earnings to participating securities |  | $ (1,011)
Allocation of undistributed earnings to participating securities (in shares / units) |  | 0
Allocation of undistributed earnings to participating securities (in dollars per share / unit) |  | $ (0.01)
Net Income Available To Common Stockholders After Allocation of Undistributed Earnings to Participating Securities Basic |  | $ 496,485
Weighted Average Number Of Shares Outstanding After Allocation of Undistributed Earnings to Participating Securities Basic (in shares) |  | 155,011,000
Earnings Per Share After Allccation of Undistributed Earnings to Particiapting Securities Basic (dollars per share) | $ 0.59 | $ 3.20
Effect of Dilutive Securities: |  |
Stock Based Compensation | $ 0 | $ 0
Stock Based Compensation (in shares / units) | 171,000 | 247,000
Weighted Average Number Diluted Shares Outstanding Adjustment (per share) | $ 0 | $ 0
Diluted Earnings: |  |
Diluted Earnings: Net income attributable to the Company's common shareholders / unitholders | $ 91,624 | $ 496,485
Diluted Earnings: Net income attributable to the Company's common shareholders / unitholders (in shares / units) | 156,099,000 | 155,258,000
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit) | $ 0.59 | $ 3.20
Boston Properties Limited Partnership |  |
Redeemable Common Units | 17,089,000 | 17,538,000
Basic Earnings: |  |
Net income attributable to the company's common shareholders / unitholders | $ 105,773 | $ 566,333
Net income attributable to the company's common shareholders / unitholders (in shares / units) | 173,018,000 | 172,549,000
Net income attributable to the company's common shareholders / unitholders (in dollars per share / unit) | $ 0.61 | $ 3.28
Allocation of undistributed earnings to participating securities |  | $ (1,126)
Allocation of undistributed earnings to participating securities (in shares / units) |  | 0
Allocation of undistributed earnings to participating securities (in dollars per share / unit) |  | $ 0
Net Income Available To Common Stockholders After Allocation of Undistributed Earnings to Participating Securities Basic |  | $ 565,207
Weighted Average Number Of Shares Outstanding After Allocation of Undistributed Earnings to Participating Securities Basic (in shares) |  | 172,549,000
Earnings Per Share After Allccation of Undistributed Earnings to Particiapting Securities Basic (dollars per share) | $ 0.61 | $ 3.28
Effect of Dilutive Securities: |  |
Stock Based Compensation | $ 0 | $ 0
Stock Based Compensation (in shares / units) | 171,000 | 247,000
Weighted Average Number Diluted Shares Outstanding Adjustment (per share) | $ 0 | $ (0.01)
Diluted Earnings: |  |
Diluted Earnings: Net income attributable to the Company's common shareholders / unitholders | $ 105,773 | $ 565,207
Diluted Earnings: Net income attributable to the Company's common shareholders / unitholders (in shares / units) | 173,189,000 | 172,796,000
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit) | $ 0.61 | $ 3.27

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