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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, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the Company | $ 79,615 | $ 104,299 | $ 159,498 | $ 182,215
Noncontrolling interest-common units of the Operating Partnership | (9,509) | (12,117) | (19,009) | (21,169)
Noncontrolling interest in property partnerships | (17,825) | (19,768) | (35,046) | (38,428)
Interest expense | (149,642) | (142,473) | (311,533) | (276,680)
Gain (Loss) from interest rate contracts | 0 |  | 0 |
Company's share of net operating income from joint ventures | (508,717) | (503,489) | (1,017,537) | (994,495)
Income (loss) from unconsolidated joint ventures | 5,799 | 6,668 | (13,387) | 14,237
Depreciation and amortization expense | (219,542) | (202,577) | (438,258) | (411,311)
Transaction costs | (189) | (308) | (702) | (1,219)
General and administrative expense | (44,109) | (44,175) | (94,127) | (99,977)
Unrealized gain on non-real estate investments | (58) | (124) | (454) | (383)
Gains from investments in securities | (315) | (1,571) | (2,587) | (3,236)
Interest and other income (loss) | (10,788) | (17,343) | (25,317) | (28,284)
Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the Company | 79,615 | 104,299 | 159,498 | 182,215
Noncontrolling interest-common units of the Operating Partnership | 9,509 | 12,117 | 19,009 | 21,169
Noncontrolling interest in property partnerships | 17,825 | 19,768 | 35,046 | 38,428
Interest expense | 149,642 | 142,473 | 311,533 | 276,680
Impairment loss | 0 | 0 | 13,615 | 0
Income (loss) from unconsolidated joint ventures | (5,799) | (6,668) | 13,387 | (14,237)
Depreciation and amortization expense | 219,542 | 202,577 | 438,258 | 411,311
Transaction costs | 189 | 308 | 702 | 1,219
Operating expense | 4,148 | 4,609 | 8,441 | 9,844
General and administrative expense | 44,109 | 44,175 | 94,127 | 99,977
Unrealized gain on non-real estate investments | 58 | 124 | 454 | 383
Gains from investments in securities | 315 | 1,571 | 2,587 | 3,236
Interest and other income (loss) | 10,788 | 17,343 | 25,317 | 28,284
Other revenue | 4,148 | 4,609 | 8,441 | 9,844
Company's share of Net Operating Income | 492,913 | 497,785 | 990,593 | 982,450
Boston Properties Limited Partnership |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the Company | 90,827 | 118,098 | 181,907 | 206,928
Noncontrolling interest in property partnerships | (17,825) | (19,768) | (35,046) | (38,428)
Interest expense | (149,642) | (142,473) | (311,533) | (276,680)
Income (loss) from unconsolidated joint ventures | 5,799 | 6,668 | (13,387) | 14,237
Depreciation and amortization expense | (217,839) | (200,895) | (434,858) | (407,767)
Transaction costs | (189) | (308) | (702) | (1,219)
General and administrative expense | (44,109) | (44,175) | (94,127) | (99,977)
Unrealized gain on non-real estate investments | (58) | (124) | (454) | (383)
Gains from investments in securities | (315) | (1,571) | (2,587) | (3,236)
Interest and other income (loss) | (10,788) | (17,343) | (25,317) | (28,284)
Boston Properties Limited Partnership | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Net income attributable to the Company | 90,827 | 118,098 | 181,907 | 206,928
Noncontrolling interest in property partnerships | 17,825 | 19,768 | 35,046 | 38,428
Interest expense | 149,642 | 142,473 | 311,533 | 276,680
Impairment loss | 0 | 0 | 13,615 | 0
Income (loss) from unconsolidated joint ventures | (5,799) | (6,668) | 13,387 | (14,237)
Depreciation and amortization expense | 217,839 | 200,895 | 434,858 | 407,767
Transaction costs | 189 | 308 | 702 | 1,219
Operating expense | 4,148 | 4,609 | 8,441 | 9,844
General and administrative expense | 44,109 | 44,175 | 94,127 | 99,977
Unrealized gain on non-real estate investments | 58 | 124 | 454 | 383
Gains from investments in securities | 315 | 1,571 | 2,587 | 3,236
Interest and other income (loss) | 10,788 | 17,343 | 25,317 | 28,284
Other revenue | 4,148 | 4,609 | 8,441 | 9,844
Company's share of Net Operating Income | 492,913 | 497,785 | 990,593 | 982,450
Unconsolidated Joint Ventures [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Interest expense | (43,299) | (58,799) | (86,862) | (116,049)
Losses from early extinguishment of debt | 0 | 3 | 0 | 3
Company's share of net operating income from joint ventures | (31,587) | (42,254) | (67,017) | (83,010)
Income (loss) from unconsolidated joint ventures | 5,799 | 6,668 | (13,387) | 14,237
Depreciation and amortization expense | (38,396) | (51,233) | (77,819) | (101,211)
Transaction costs | (5) | (27) | (8) | (101)
Unconsolidated Joint Ventures [Member] | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Company's share of net operating income from joint ventures | 31,587 | 42,254 |  |
Management Service [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Other revenue | (6,352) | (9,858) | (12,506) | (18,838)
Management Service [Member] | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Other revenue | 6,352 | 9,858 | 12,506 | 18,838
Management Service [Member] | Boston Properties Limited Partnership |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Other revenue | (6,352) | (9,858) | (12,506) | (18,838)
Management Service [Member] | Boston Properties Limited Partnership | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Other revenue | 6,352 | 9,858 | 12,506 | 18,838
Noncontrolling interest - property partnerships [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Company's share of net operating income from joint ventures | 47,391 | 47,958 | 93,961 | 95,055
Noncontrolling interest - property partnerships [Member] | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Company's share of net operating income from joint ventures | 47,391 | 47,958 | 93,961 | 95,055
Noncontrolling interest - property partnerships [Member] | Boston Properties Limited Partnership | Segment Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Company's share of net operating income from joint ventures | $ 47,391 | $ 47,958 | $ 93,961 | $ 95,055

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