XML 49 R32.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2017 USD ($)
Entity Information [Line Items] |
Cumulative effect of a change in accounting principle | $ 2,035
Boston Properties Limited Partnership |
Entity Information [Line Items] |
Cumulative effect of a change in accounting principle | 272
Dividends In Excess Of Earnings [Member] |
Entity Information [Line Items] |
Cumulative effect of a change in accounting principle | 272
Noncontrolling Interests [Member] |
Entity Information [Line Items] |
Cumulative effect of a change in accounting principle | 1,763
Noncontrolling Interests [Member] | Boston Properties Limited Partnership |
Entity Information [Line Items] |
Cumulative effect of a change in accounting principle | $ 1,763

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: | dei_EntityInformationLineItems
Namespace Prefix: | dei_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of the cumulative effect on retained earnings net of related income tax effect. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22663-107794 + Details
Name: | us-gaap_CumulativeEffectOnRetainedEarningsNetOfTax1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_NoncontrollingInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |