Consolidated Statements Of Operations - USD ($) shares in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Revenue
Lease		$ 679,251,000	$ 0
Base rent		0	519,507,000
Recoveries from tenants		0	95,118,000
Hotel	[1]	8,938,000	9,102,000
Development and management services		9,277,000	8,405,000
Total revenue		725,767,000	661,151,000
Expenses
Rental		257,517,000	240,329,000
Operating expense		7,863,000	8,073,000
General and administrative		41,762,000	35,894,000
Transaction costs		460,000	21,000
Depreciation and amortization		164,594,000	165,797,000
Total expenses		475,591,000	452,999,000
Other income (expense)
Income from unconsolidated joint ventures		213,000	461,000
(Losses) gains on sales of real estate		(905,000)	96,397,000
Interest and other income		3,753,000	1,648,000
Gains (losses) from investments in securities		2,969,000	(126,000)
Impairment loss		(24,038,000)	0
Interest expense		(101,009,000)	(90,220,000)
Net income		131,159,000	216,312,000
Net income attributable to noncontrolling interests
Noncontrolling interests in property partnerships		(18,830,000)	(17,234,000)
Noncontrolling interest—common units of Boston Properties Limited Partnership		(11,599,000)	(20,432,000)
Net income attributable to the Company		100,730,000	178,646,000
Preferred dividends / distributions		(2,625,000)	(2,625,000)
Net income attributable to the Company's common shareholders / unitholders		$ 98,105,000	$ 176,021,000
Basic earnings per common share / unit attributable to the Company's common shareholders / unitholders
Net income (in dollars per share / unit)		$ 0.63	$ 1.14
Weighted average number of common shares / units outstanding		154,525	154,385
Diluted earnings per common share / unit attributable to the Company's common shareholders / unitholders
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit)		$ 0.63	$ 1.14
Weighted average number of common and common equivalent shares / units outstanding (in shares / units)		154,844	154,705
Boston Properties Limited Partnership
Revenue
Lease		$ 679,251,000	$ 0
Base rent			519,507,000
Recoveries from tenants		0	95,118,000
Development and management services		9,277,000	8,405,000
Total revenue		725,767,000	661,151,000
Expenses
Rental		257,517,000	240,329,000
General and administrative		41,762,000	35,894,000
Transaction costs		460,000	21,000
Depreciation and amortization		162,682,000	163,853,000
Total expenses		473,679,000	451,055,000
Other income (expense)
Income from unconsolidated joint ventures		213,000	461,000
(Losses) gains on sales of real estate		(905,000)	98,907,000
Interest and other income		3,753,000	1,648,000
Gains (losses) from investments in securities		2,969,000	(126,000)
Impairment loss		(22,272,000)	0
Interest expense		(101,009,000)	(90,220,000)
Net income		134,837,000	220,766,000
Net income attributable to noncontrolling interests
Noncontrolling interests in property partnerships		(18,830,000)	(17,234,000)
Net income attributable to the Company		116,007,000	203,532,000
Preferred dividends / distributions		(2,625,000)	(2,625,000)
Net income attributable to the Company's common shareholders / unitholders		$ 113,382,000	$ 200,907,000
Basic earnings per common share / unit attributable to the Company's common shareholders / unitholders
Net income (in dollars per share / unit)		$ 0.66	$ 1.17
Weighted average number of common shares / units outstanding		172,131	171,867
Diluted earnings per common share / unit attributable to the Company's common shareholders / unitholders
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit)		$ 0.66	$ 1.17
Weighted average number of common and common equivalent shares / units outstanding (in shares / units)		172,450	172,187
Parking and Other [Member]
Revenue
Hotel		$ 24,906,000	$ 26,134,000
Parking and Other [Member] | Boston Properties Limited Partnership
Revenue
Hotel		24,906,000	26,134,000
Hotel [Member]
Revenue
Hotel		8,938,000	9,102,000
Expenses
Operating expense		7,863,000	8,073,000
Hotel [Member] | Boston Properties Limited Partnership
Revenue
Hotel		8,938,000	9,102,000
Expenses
Operating expense		7,863,000	8,073,000
Management Service [Member]
Revenue
Hotel		3,395,000	2,885,000
Expenses
Operating expense		3,395,000	2,885,000
Management Service [Member] | Boston Properties Limited Partnership
Revenue
Hotel		3,395,000	2,885,000
Expenses
Operating expense		$ 3,395,000	$ 2,885,000

[1] Rental Revenue is equal to total Revenue per the Company's Consolidated Statements of Operations, less Development and Management Services Revenue and Direct Reimbursements of Payroll and Related Costs from Management Services Contracts Revenue per the Consolidated Statements of Operations.