XML 58 R38.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Stockholders' Equity / Partners' Capital (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Class of Stock [Line Items] |
Dividends Declared [Table Text Block] | The following table presents Boston Properties, Inc.’s dividends per share and Boston Properties Limited Partnership’s distributions per OP Unit and LTIP Unit paid or payable in 2018:
Record Date |  | Payment Date |  | Dividend (Per Share) |  |  | Distribution (Per Unit) |
December 31, 2018 |  | January 30, 2019 |  |  | $0.95 |  |  |  | $0.95 |
September 28, 2018 |  | October 31, 2018 |  |  | $0.95 |  |  |  | $0.95 |
June 29, 2018 |  | July 31, 2018 |  |  | $0.80 |  |  |  | $0.80 |
March 29, 2018 |  | April 30, 2018 |  |  | $0.80 |  |  |  | $0.80 |
December 29, 2017 |  | January 30, 2018 |  |  | $0.80 |  |  |  | $0.80 |
Series B Preferred Stock [Member] |
Class of Stock [Line Items] |
Dividends Declared [Table Text Block] | The following table presents Boston Properties Inc.’s dividends per share on its outstanding Series B Preferred Stock paid or payable in 2018:
Record Date |  | Payment Date |  | Dividend (Per Share) |
February 4, 2019 |  | February 15, 2019 |  |  | $32.8125 |
November 2, 2018 |  | November 15, 2018 |  |  | $32.8125 |
August 3, 2018 |  | August 15, 2018 |  |  | $32.8125 |
May 4, 2018 |  | May 15, 2018 |  |  | $32.8125 |
February 2, 2018 |  | February 15, 2018 |  |  | $32.8125 |
Boston Properties Limited Partnership |
Class of Stock [Line Items] |
Schedule Of Changes In Partners Capital Unit [Table Text Block] | The following table presents the changes in the issued and outstanding partners’ capital units since January 1, 2016:
|  | General Partner Units |  | Limited Partner Units |  | Total Partners’ Capital Units
Outstanding at December 31, 2015 |  | 1,715,092 |  |  | 151,864,874 |  |  | 153,579,966 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Employee Stock Purchase Plan |  | 72 |  |  | 5,623 |  |  | 5,695 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Stock Option and Incentive Plan, net |  | 172 |  |  | 13,485 |  |  | 13,657 |
Units issued to Boston Properties, Inc. related to Common Stock issued in exchange for OP Units |  | 2,407 |  |  | 188,450 |  |  | 190,857 |
Outstanding at December 31, 2016 |  | 1,717,743 |  |  | 152,072,432 |  |  | 153,790,175 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Employee Stock Purchase Plan |  | 21 |  |  | 6,296 |  |  | 6,317 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Stock Option and Incentive Plan, net |  | 111 |  |  | 33,046 |  |  | 33,157 |
Units issued to Boston Properties, Inc. related to Common Stock issued in exchange for OP Units |  | 1,665 |  |  | 493,972 |  |  | 495,637 |
Outstanding at December 31, 2017 |  | 1,719,540 |  |  | 152,605,746 |  |  | 154,325,286 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Employee Stock Purchase Plan |  | 132 |  |  | 6,136 |  |  | 6,268 |
Units issued to Boston Properties, Inc. related to Common Stock issued under the Stock Option and Incentive Plan, net |  | 919 |  |  | 42,869 |  |  | 43,788 |
Units issued to Boston Properties, Inc. related to Common Stock issued in exchange for OP Units |  | 1,745 |  |  | 81,391 |  |  | 83,136 |
Outstanding at December 31, 2018 |  | 1,722,336 |  |  | 152,736,142 |  |  | 154,458,478 |
Schedule of Changes in Series B Preferred Units [Table Text Block] | The following table reflects the activity of the Series B Preferred Units for the years ended December 31, 2018, 2017 and 2016 (in thousands), which activity is included within Boston Properties Limited Partnership’s Consolidated Statements of Partners’ Capital:
Balance at December 31, 2015 | $ | 193,623 |
Net income | 10,500 |
Distributions | (10,500 | )
Balance at December 31, 2016 | 193,623 |
Net income | 10,500 |
Distributions | (10,500 | )
Balance at December 31, 2017 | 193,623 |
Net income | 10,500 |
Distributions | (10,500 | )
Balance at December 31, 2018 | $ | 193,623 |

X
- Definition Schedule Of Changes In Partners Capital Unit [Table Text Block] + References No definition available. + Details
Name: | bxp_ScheduleOfChangesInPartnersCapitalUnitTableTextBlockTableTextBlock
Namespace Prefix: | bxp_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of changes in Series B Preferred Units [Table Text Block] + References No definition available. + Details
Name: | bxp_ScheduleofchangesinSeriesBPreferredUnitsTableTextBlockTableTextBlock
Namespace Prefix: | bxp_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
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_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information related to dividends declared, including paid and unpaid dividends. + References No definition available. + Details
Name: | us-gaap_DividendsDeclaredTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=bxp_SeriesBCumulativeRedeemablePreferredStockUnitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=us-gaap_SubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |