Earnings Per Share / Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Basic Earnings:
Net income attributable to the Company	$ 79,883	$ 77,890
Net income (loss) attributable to the company (in shares / units)	156,983,000	156,803,000
Net income (loss) attributable to the company (in dollars per share / unit)	$ 0.51	$ 0.50
Earnings Per Share After Allocation of Undistributed Earnings to Participating Securities Basic (dollars per share)	$ 0.51	$ 0.50
Effect of Dilutive Securities:
Stock Based Compensation	$ 0	$ 0
Stock Based Compensation (in shares / units)	149,000	240,000
Weighted Average Number Diluted Shares Outstanding Adjustment (per share)	$ 0	$ 0
Diluted Earnings:
Diluted Earnings: Net income attributable to the Company	$ 79,883	$ 77,890
Diluted Earnings: Net income attributable to the Company (in shares / units)	157,132,000	157,043,000
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit)	$ 0.51	$ 0.50
Boston Properties Limited Partnership
Redeemable Common Units	18,272,000	17,849,000
Basic Earnings:
Net income attributable to the Company	$ 91,080	$ 88,830
Net income (loss) attributable to the company (in shares / units)	175,255,000	174,652,000
Net income (loss) attributable to the company (in dollars per share / unit)	$ 0.52	$ 0.51
Earnings Per Share After Allocation of Undistributed Earnings to Participating Securities Basic (dollars per share)	$ 0.52	$ 0.51
Effect of Dilutive Securities:
Stock Based Compensation	$ 0	$ 0
Stock Based Compensation (in shares / units)	149,000	240,000
Weighted Average Number Diluted Shares Outstanding Adjustment (per share)	$ 0	$ 0
Diluted Earnings:
Diluted Earnings: Net income attributable to the Company	$ 91,080	$ 88,830
Diluted Earnings: Net income attributable to the Company (in shares / units)	175,404,000	174,892,000
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit)	$ 0.52	$ 0.51