XML 22 R7.htm IDEA: XBRL DOCUMENT
v3.19.1

Consolidated Statement of Partners' Capital Statement - USD ($) $ in Thousands | Total | General Partner [Member] | Limited Partner [Member] | Partners' Capital (General and Limited Partners) [Member] | Preferred Units [Member] | Accumulated Other Comprehensive (Income) Loss [Member] | Noncontrolling interest - property partnerships [Member] | Noncontrolling interest - property partnerships [Member] Boston Properties Limited Partnership | Total Capital [Member] | Noncontrolling interest - Redeemable partnership units [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Common Stock, Shares, Outstanding |  | 1,720,000 | 152,606,000 |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2017 |  |  |  | $ 3,664,436 | $ 193,623 | $ (50,429) | $ 1,683,760 |  | $ 5,491,390 | $ 2,292,263
Cumulative effect of a change in accounting principle | $ 5,496 |  |  | 4,933 |  |  |  |  | 4,933 | 563
Contributions |  | 1,000 | 11,000 |  |  |  |  |  |  |
Contributions |  |  |  | 1,452 |  |  |  |  | 1,452 | 34,258
Allocated net income for the year |  |  |  | 180,475 | 2,625 |  | 17,234 |  | 200,334 | 20,432
Distributions |  |  |  | (123,490) | (2,625) |  |  |  | (126,115) | (14,351)
Unearned compensation |  |  |  | (1,208) |  |  |  |  | (1,208) | (20,453)
Converstion of redeemable partnership units |  | 1,000 | 23,000 |  |  |  |  |  |  |
Conversion of redeemable partnership units |  |  |  | 832 |  |  |  |  | 832 | (832)
Adjustment to reflect redeemable partnership units at redemption value |  |  |  | 115,432 |  |  |  |  | 115,432 | (115,432)
Amortization of interest rate contracts | 1,666 |  |  |  |  | 1,367 | 144 |  | 1,511 | 155
Contributions from noncontrolling interests in property partnerships | 15,267 |  |  |  |  |  | 15,267 |  | 15,267 |
Distributions to noncontrolling interests in property partnerships | $ (30,690) |  |  |  |  |  | (30,690) |  | (30,690) |
Ending Balance at Mar. 31, 2018 |  |  |  | 3,842,862 | 193,623 | (49,062) | 1,685,715 |  | 5,673,138 | 2,196,603
Common Stock, Shares, Outstanding |  | 1,722,000 | 152,640,000 |  |  |  |  |  |  |
Common Stock, Shares, Outstanding | 154,458,478 | 1,722,000 | 152,736,000 |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2018 |  |  |  | 4,054,996 | 193,623 | (47,741) | 1,711,445 |  | 5,912,323 | 2,000,591
Cumulative effect of a change in accounting principle | $ (4,379) |  |  | (3,864) |  |  | (70) | $ 70 | (3,934) | (445)
Contributions |  | 2,000 | 41,000 |  |  |  |  |  |  |
Contributions |  |  |  | 4,820 |  |  |  |  | 4,820 | 34,400
Allocated net income for the year |  |  |  | 101,783 | 2,625 |  | 18,830 |  | 123,238 | 11,599
Distributions |  |  |  | (146,790) | (2,625) |  |  |  | (149,415) | (17,185)
Unearned compensation |  |  |  | (1,388) |  |  |  |  | (1,388) | (20,990)
Converstion of redeemable partnership units |  | 1,000 | 13,000 |  |  |  |  |  |  |
Conversion of redeemable partnership units |  |  |  | 492 |  |  |  |  | 492 | (492)
Adjustment to reflect redeemable partnership units at redemption value |  |  |  | (406,875) |  |  |  |  | (406,875) | 406,875
Effective portion of interest rate contracts | (2,628) |  |  |  |  | (2,359) |  |  | (2,359) | (269)
Amortization of interest rate contracts | 1,666 |  |  |  |  | 1,366 | 144 |  | 1,510 | 156
Contributions from noncontrolling interests in property partnerships | 4,387 |  |  |  |  |  | 4,387 |  | 4,387 |
Distributions to noncontrolling interests in property partnerships | $ (24,128) |  |  |  |  |  | (24,128) |  | (24,128) |
Ending Balance at Mar. 31, 2019 |  |  |  | $ 3,603,174 | $ 193,623 | $ (48,734) | $ 1,710,608 |  | $ 5,458,671 | $ 2,414,240
Common Stock, Shares, Outstanding | 154,515,486 | 1,725,000 | 152,790,000 |  |  |  |  |  |  |

X
- Definition Aggregate Partners Capital (inclusive of Series B Preferred Units) + References No definition available. + Details
Name: | bxp_AggregatePartnersCapitalInclusiveOfSeriesBPreferredUnits
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contributions + References No definition available. + Details
Name: | bxp_Contributions
Namespace Prefix: | bxp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. + References No definition available. + Details
Name: | bxp_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolderstoPropertyPartnerships
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net Income Allocable To General And Limited Partner Units + References No definition available. + Details
Name: | bxp_NetIncomeAllocableToGeneralAndLimitedPartnerUnits
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of the cumulative effect on retained earnings net of related income tax effect. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794 + Details
Name: | us-gaap_CumulativeEffectOnRetainedEarningsNetOfTax1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in other comprehensive income, after tax, from changes classified as other. + References No definition available. + Details
Name: | us-gaap_OtherComprehensiveIncomeOtherNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total contributions made by each class of partners (i.e., general, limited and preferred partners). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_PartnersCapitalAccountContributions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total change in each class of partners' capital accounts during the year due to deferred compensation. Partners include general, limited and preferred partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
Name: | us-gaap_PartnersCapitalAccountDeferredCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total distributions to each class of partners (i.e., general, limited and preferred partners). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 + Details
Name: | us-gaap_PartnersCapitalAccountDistributions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total change in each class of partners' capital accounts during the year due to exchanges and conversions. Partners include general, limited and preferred partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_PartnersCapitalAccountExchangesAndConversions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 + Details
Name: | us-gaap_PartnersCapitalAccountRedemptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromMinorityShareholders
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration