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Segment Information (Schedule Of Reconciliation Of Net Operating Income To Net Income) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Net income attributable to the Company's common shareholders / unitholders | $ 97,083 | $ 181,747
Preferred Stock Dividends / Distributions | (2,625) | (2,618)
Noncontrolling interest-common units of the Operating Partnership | (11,432) | (21,393)
Noncontrolling interest in property partnerships | (4,424) | (10,464)
Interest expense | (95,534) | (105,309)
Depreciation and amortization expense | (159,205) | (159,448)
Transaction costs | (34) | (25)
General and administrative expense | (31,386) | (29,353)
Gains from investments in securities | (1,042) | (259)
Interest and other income | (614) | (1,505)
Income from unconsolidated joint ventures | (3,084) | (1,791)
Development and management services income | (6,472) | (6,689)
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 | 97,083 | 181,747
Preferred Stock Dividends / Distributions | 2,625 | 2,618
Noncontrolling interest-common units of the Operating Partnership | 11,432 | 21,393
Noncontrolling interest in property partnerships | 4,424 | 10,464
Interest expense | 95,534 | 105,309
Depreciation and amortization expense | 159,205 | 159,448
Transaction costs | 34 | 25
General and administrative expense | 31,386 | 29,353
Gains on sales of real estate | 133 | 67,623
Gains from investments in securities | 1,042 | 259
Interest and other income | 614 | 1,505
Income from unconsolidated joint ventures | 3,084 | 1,791
Development and management services income | 6,472 | 6,689
Net Operating Income | 390,378 | 432,490
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 | 110,662 | 207,296
Preferred Stock Dividends / Distributions | (2,625) | (2,618)
Noncontrolling interest in property partnerships | (4,424) | (10,464)
Interest expense | (95,534) | (105,309)
Depreciation and amortization expense | (157,058) | (157,461)
Transaction costs | (34) | (25)
General and administrative expense | (31,386) | (29,353)
Gains from investments in securities | (1,042) | (259)
Interest and other income | (614) | (1,505)
Income from unconsolidated joint ventures | (3,084) | (1,791)
Development and management services income | (6,472) | (6,689)
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 | 110,662 | 207,296
Preferred Stock Dividends / Distributions | 2,625 | 2,618
Noncontrolling interest in property partnerships | 4,424 | 10,464
Interest expense | 95,534 | 105,309
Depreciation and amortization expense | 157,058 | 157,461
Transaction costs | 34 | 25
General and administrative expense | 31,386 | 29,353
Gains on sales of real estate | 133 | 69,792
Gains from investments in securities | 1,042 | 259
Interest and other income | 614 | 1,505
Income from unconsolidated joint ventures | 3,084 | 1,791
Development and management services income | 6,472 | 6,689
Net Operating Income | $ 390,378 | $ 432,490

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