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Segment Information (Schedule Of Reconciliation Of Net Operating Income To Net Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the Company's common shareholders / unitholders | $ 128,681 | $ 133,709 | $ 304,682 | $ 230,764
Preferred Stock Dividends / Distributions | (2,625) | (2,625) | (5,250) | (5,250)
Noncontrolling interest-common units of the Operating Partnership | (14,859) | (15,473) | (35,311) | (26,933)
Noncontrolling interest in property partnerships | (14,400) | (15,203) | (31,634) | (19,627)
Interest expense | (92,204) | (95,143) | (182,424) | (190,677)
Depreciation and amortization expense | (156,417) | (151,919) | (322,214) | (311,124)
Transaction costs | (474) | (299) | (495) | (333)
Payroll and related costs from management services contracts | (1,970) | 0 | (4,855) | 0
General and administrative expense | (28,468) | (27,141) | (64,362) | (58,527)
Gains from early extinguishments of debt | 0 | (14,354) | 0 | (14,354)
Gains from investments in securities | (505) | (730) | (379) | (1,772)
Interest and other income | (2,579) | (1,504) | (4,227) | (2,118)
Income from unconsolidated joint ventures | (769) | (3,108) | (1,230) | (6,192)
Direct reimbursements of payroll and related costs from management services contracts | (1,970) | 0 | (4,855) | 0
Development and management services income | (9,305) | (7,365) | (17,710) | (13,837)
Business Intersegment, Eliminations [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the Company's common shareholders / unitholders | 128,681 | 133,709 | 304,682 | 230,764
Preferred Stock Dividends / Distributions | 2,625 | 2,625 | 5,250 | 5,250
Noncontrolling interest-common units of the Operating Partnership | 14,859 | 15,473 | 35,311 | 26,933
Noncontrolling interest in property partnerships | 14,400 | 15,203 | 31,634 | 19,627
Interest expense | 92,204 | 95,143 | 182,424 | 190,677
Depreciation and amortization expense | 156,417 | 151,919 | 322,214 | 311,124
Transaction costs | 474 | 299 | 495 | 333
Payroll and related costs from management services contracts | 1,970 | 0 | 4,855 | 0
General and administrative expense | 28,468 | 27,141 | 64,362 | 58,527
Gains on sales of real estate | 18,292 | 3,767 | 114,689 | 3,900
Gains from early extinguishments of debt | 0 | 14,354 | 0 | 14,354
Gains from investments in securities | 505 | 730 | 379 | 1,772
Interest and other income | 2,579 | 1,504 | 4,227 | 2,118
Income from unconsolidated joint ventures | 769 | 3,108 | 1,230 | 6,192
Direct reimbursements of payroll and related costs from management services contracts | 1,970 | 0 | 4,855 | 0
Development and management services income | 9,305 | 7,365 | 17,710 | 13,837
Net Operating Income | 406,678 | 410,684 | 808,137 | 801,062
Boston Properties Limited Partnership |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the Company's common shareholders / unitholders | 145,961 | 151,844 | 346,868 | 262,506
Preferred Stock Dividends / Distributions | (2,625) | (2,625) | (5,250) | (5,250)
Noncontrolling interest in property partnerships | (14,400) | (15,203) | (31,634) | (19,627)
Interest expense | (92,204) | (95,143) | (182,424) | (190,677)
Depreciation and amortization expense | (154,474) | (149,834) | (318,327) | (306,892)
Transaction costs | (474) | (299) | (495) | (333)
Payroll and related costs from management services contracts | (1,970) | 0 | (4,855) | 0
General and administrative expense | (28,468) | (27,141) | (64,362) | (58,527)
Gains from early extinguishments of debt | 0 | (14,354) | 0 | (14,354)
Gains from investments in securities | (505) | (730) | (379) | (1,772)
Interest and other income | (2,579) | (1,504) | (4,227) | (2,118)
Income from unconsolidated joint ventures | (769) | (3,108) | (1,230) | (6,192)
Direct reimbursements of payroll and related costs from management services contracts | (1,970) | 0 | (4,855) | 0
Development and management services income | (9,305) | (7,365) | (17,710) | (13,837)
Boston Properties Limited Partnership | Business Intersegment, Eliminations [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the Company's common shareholders / unitholders | 145,961 | 151,844 | 346,868 | 262,506
Preferred Stock Dividends / Distributions | 2,625 | 2,625 | 5,250 | 5,250
Noncontrolling interest in property partnerships | 14,400 | 15,203 | 31,634 | 19,627
Interest expense | 92,204 | 95,143 | 182,424 | 190,677
Depreciation and amortization expense | 154,474 | 149,834 | 318,327 | 306,892
Transaction costs | 474 | 299 | 495 | 333
Payroll and related costs from management services contracts | 1,970 | 0 | 4,855 | 0
General and administrative expense | 28,468 | 27,141 | 64,362 | 58,527
Gains on sales of real estate | 18,770 | 4,344 | 117,677 | 4,477
Gains from early extinguishments of debt | 0 | 14,354 | 0 | 14,354
Gains from investments in securities | 505 | 730 | 379 | 1,772
Interest and other income | 2,579 | 1,504 | 4,227 | 2,118
Income from unconsolidated joint ventures | 769 | 3,108 | 1,230 | 6,192
Direct reimbursements of payroll and related costs from management services contracts | 1,970 | 0 | 4,855 | 0
Development and management services income | 9,305 | 7,365 | 17,710 | 13,837
Net Operating Income | $ 406,678 | $ 410,684 | $ 808,137 | $ 801,062

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