XML 69 R52.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Segment Information (Schedule Of Segment Reporting By Geographic Area And Property Type) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
Rental Revenue: Office | $ 633,803 | $ 631,957 | $ 1,270,403 | $ 1,246,337
Rental Revenue: Residential | 4,799 | 4,210 | 8,958 | 8,166
Rental Revenue: Hotel | 14,607 | 13,375 | 23,709 | 20,795
Total revenue | $ 653,209 | $ 649,542 | $ 1,303,070 | $ 1,275,298
Rental Revenue: % of Grand Totals | 100.00% | 100.00% | 100.00% | 100.00%
Rental Expenses: Office | $ 234,877 | $ 228,819 | $ 472,934 | $ 455,555
Rental Expenses: Residential | 2,913 | 1,635 | 5,185 | 3,186
Rental Expenses: Hotel | 8,741 | 8,404 | 16,814 | 15,495
Rental Expenses: Total | $ 246,531 | $ 238,858 | $ 494,933 | $ 474,236
Rental Expenses: % Of Grand Totals | 100.00% | 100.00% | 100.00% | 100.00%
Net operating Income | $ 406,678 | $ 410,684 | $ 808,137 | $ 801,062
Net operating Income: % of Grand Totals | 100.00% | 100.00% | 100.00% | 100.00%
Boston [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental Revenue: Office | $ 207,810 | $ 191,760 | $ 412,807 | $ 377,196
Rental Revenue: Residential | 1,195 | 1,153 | 2,347 | 2,292
Rental Revenue: Hotel | 14,607 | 13,375 | 23,709 | 20,795
Total revenue | $ 223,612 | $ 206,288 | $ 438,863 | $ 400,283
Rental Revenue: % of Grand Totals | 34.23% | 31.76% | 33.68% | 31.39%
Rental Expenses: Office | $ 77,147 | $ 74,160 | $ 157,471 | $ 149,416
Rental Expenses: Residential | 706 | 545 | 1,220 | 1,040
Rental Expenses: Hotel | 8,741 | 8,404 | 16,814 | 15,495
Rental Expenses: Total | $ 86,594 | $ 83,109 | $ 175,505 | $ 165,951
Rental Expenses: % Of Grand Totals | 35.12% | 34.79% | 35.46% | 34.99%
Net operating Income | $ 137,018 | $ 123,179 | $ 263,358 | $ 234,332
Net operating Income: % of Grand Totals | 33.69% | 29.99% | 32.59% | 29.25%
New York [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental Revenue: Office | $ 234,006 | $ 251,844 | $ 476,404 | $ 493,414
Rental Revenue: Residential | 0 | 0 | 0 | 0
Rental Revenue: Hotel | 0 | 0 | 0 | 0
Total revenue | $ 234,006 | $ 251,844 | $ 476,404 | $ 493,414
Rental Revenue: % of Grand Totals | 35.83% | 38.77% | 36.56% | 38.69%
Rental Expenses: Office | $ 91,838 | $ 93,110 | $ 185,600 | $ 184,794
Rental Expenses: Residential | 0 | 0 | 0 | 0
Rental Expenses: Hotel | 0 | 0 | 0 | 0
Rental Expenses: Total | $ 91,838 | $ 93,110 | $ 185,600 | $ 184,794
Rental Expenses: % Of Grand Totals | 37.26% | 38.98% | 37.50% | 38.97%
Net operating Income | $ 142,168 | $ 158,734 | $ 290,804 | $ 308,620
Net operating Income: % of Grand Totals | 34.96% | 38.65% | 35.98% | 38.53%
San Francisco [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental Revenue: Office | $ 93,482 | $ 85,483 | $ 183,375 | $ 170,124
Rental Revenue: Residential | 0 | 0 | 0 | 0
Rental Revenue: Hotel | 0 | 0 | 0 | 0
Total revenue | $ 93,482 | $ 85,483 | $ 183,375 | $ 170,124
Rental Revenue: % of Grand Totals | 14.31% | 13.16% | 14.07% | 13.34%
Rental Expenses: Office | $ 31,214 | $ 25,938 | $ 58,842 | $ 50,412
Rental Expenses: Residential | 0 | 0 | 0 | 0
Rental Expenses: Hotel | 0 | 0 | 0 | 0
Rental Expenses: Total | $ 31,214 | $ 25,938 | $ 58,842 | $ 50,412
Rental Expenses: % Of Grand Totals | 12.66% | 10.86% | 11.89% | 10.63%
Net operating Income | $ 62,268 | $ 59,545 | $ 124,533 | $ 119,712
Net operating Income: % of Grand Totals | 15.31% | 14.50% | 15.41% | 14.94%
Washington, DC [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Rental Revenue: Office | $ 98,505 | $ 102,870 | $ 197,817 | $ 205,603
Rental Revenue: Residential | 3,604 | 3,057 | 6,611 | 5,874
Rental Revenue: Hotel | 0 | 0 | 0 | 0
Total revenue | $ 102,109 | $ 105,927 | $ 204,428 | $ 211,477
Rental Revenue: % of Grand Totals | 15.63% | 16.31% | 15.69% | 16.58%
Rental Expenses: Office | $ 34,678 | $ 35,611 | $ 71,021 | $ 70,933
Rental Expenses: Residential | 2,207 | 1,090 | 3,965 | 2,146
Rental Expenses: Hotel | 0 | 0 | 0 | 0
Rental Expenses: Total | $ 36,885 | $ 36,701 | $ 74,986 | $ 73,079
Rental Expenses: % Of Grand Totals | 14.96% | 15.37% | 15.15% | 15.41%
Net operating Income | $ 65,224 | $ 69,226 | $ 129,442 | $ 138,398
Net operating Income: % of Grand Totals | 16.04% | 16.86% | 16.02% | 17.28%

X
- Definition Operating Income Loss From Reportable Segments + References No definition available. + Details
Name: | bxp_OperatingIncomeLossFromReportableSegments
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage Of Total Net Operating Income + References No definition available. + Details
Name: | bxp_PercentageOfTotalNetOperatingIncome
Namespace Prefix: | bxp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Of Total Rental Expenses. + References No definition available. + Details
Name: | bxp_PercentageOfTotalRentalExpenses
Namespace Prefix: | bxp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition These are percentages not monetary value + References No definition available. + Details
Name: | bxp_PercentageOfTotalRevenue
Namespace Prefix: | bxp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rental Expenses Office + References No definition available. + Details
Name: | bxp_RentalExpensesOffice
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Rental Expenses Operating Expenses Total. + References No definition available. + Details
Name: | bxp_RentalExpensesOperatingExpensesTotal
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Rental Expenses Residential. + References No definition available. + Details
Name: | bxp_RentalExpensesResidential
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Rental Revenue Office + References No definition available. + Details
Name: | bxp_RentalRevenueOffice
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Rental Revenue Residential. + References No definition available. + Details
Name: | bxp_RentalRevenueResidential
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Rental Revenue Total + References No definition available. + Details
Name: | bxp_RentalRevenueTotal
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate direct costs incurred in operating leased, owned and other hotels. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_DirectCostsOfHotels
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, net of promotional allowances, of revenue from managing and operating hotels, including, but not limited to, revenue from occupancy, casino, food and beverage, and retail. Excludes operating lease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_RevenueFromLeasedAndOwnedHotels
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementGeographicalAxis=bxp_BostonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=stpr_NY
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=bxp_SanFranciscoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=stpr_WA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |