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Earnings Per Share / Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Basic Earnings: |  |
Net income attributable to the Company's common shareholders / unitholders | $ 181,747 | $ 171,182
Net income attributable to the Company's common shareholders / unitholders (in shares / units) | 153,626,000 | 153,230,000
Net income (in dollars per share / unit) | $ 1.18 | $ 1.12
Allocation of undistributed earnings to participating securities | $ (247) | $ (188)
Allocation of undistributed earnings to participating securities (in shares / units) | 0 | 0
Allocation of undistributed earnings to participating securities (per share / unit) | $ 0 | $ 0
Net income attributable to the Company's common shareholders / unitholders | $ 181,500 | $ 170,994
Net income attributable to the Company'scommon shareholders / unitholders(in shares / units) | 153,626,000 | 153,230,000
Net income attributable tothe Company's common shareholders / unitholders (in dollars per share / unit) | $ 1.18 | $ 1.12
Effect of Dilutive Securities: |  |
Stock Based Compensation, Income (Numerator) | $ 0 | $ 0
Stock Based Compensation, Shares / Units (Denominator) | 291,000 | 643,000
Stock Based Compensation, Per Share / Unit Amount (in dollars per share / unit) | $ 0.00 | $ (0.01)
Diluted Earnings: |  |
Net income attributable to the Company's common shareholders / unitholders (Numerator) | $ 181,500 | $ 170,994
Net income attributable to the Company's common shareholders / unitholders (in shares / units) (Denominator) | 153,917,000 | 153,873,000
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit) | $ 1.18 | $ 1.11
Boston Properties Limited Partnership |  |
Entity Information [Line Items] |  |
Redeemable Common Units | 17,683,000 | 17,854,000
Basic Earnings: |  |
Net income attributable to the Company's common shareholders / unitholders | $ 207,296 | $ 193,369
Net income attributable to the Company's common shareholders / unitholders (in shares / units) | 171,309,000 | 171,084,000
Net income (in dollars per share / unit) | $ 1.21 | $ 1.13
Allocation of undistributed earnings to participating securities | $ (275) | $ (210)
Allocation of undistributed earnings to participating securities (in shares / units) | 0 | 0
Allocation of undistributed earnings to participating securities (per share / unit) | $ 0 | $ 0
Net income attributable to the Company's common shareholders / unitholders | $ 207,021 | $ 193,159
Net income attributable to the Company'scommon shareholders / unitholders(in shares / units) | 171,309,000 | 171,084,000
Net income attributable tothe Company's common shareholders / unitholders (in dollars per share / unit) | $ 1.21 | $ 1.13
Effect of Dilutive Securities: |  |
Stock Based Compensation, Income (Numerator) | $ 0 | $ 0
Stock Based Compensation, Shares / Units (Denominator) | 291,000 | 643,000
Stock Based Compensation, Per Share / Unit Amount (in dollars per share / unit) | $ 0.00 | $ (0.01)
Diluted Earnings: |  |
Net income attributable to the Company's common shareholders / unitholders (Numerator) | $ 207,021 | $ 193,159
Net income attributable to the Company's common shareholders / unitholders (in shares / units) (Denominator) | 171,600,000 | 171,727,000
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit) | $ 1.21 | $ 1.12

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