XML 98 R77.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Noncontrolling Interests (Redeemable Preferred Units) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |
Beginning Balance | $ 633 |  |
Net income | 6 | $ 1,023 | $ 6,046
Redemption of redeemable preferred units (Series Four Preferred Units) | (633) | (17,373) | (43,070)
Conversion of redeemable preferred units (Series Two Preferred Units) to common units |  | 33,306 | 16,494
Ending Balance | 0 | 633 |
Redeemable Preferred Units [Member] |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |
Beginning Balance | 633 | 51,312 | 110,876
Net income | 6 | 1,023 | 6,046
Distributions | (6) | (1,023) | (6,046)
Redemption of redeemable preferred units (Series Four Preferred Units) | (633) | (17,373) | (43,070)
Conversion of redeemable preferred units (Series Two Preferred Units) to common units |  | (33,306) | (16,494)
Ending Balance | $ 0 | $ 633 | $ 51,312

X
- Definition Conversions On Series Two Preferred Units + References No definition available. + Details
Name: | bxp_ConversionsOnSeriesTwoPreferredUnits
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Distributions to Preferred Units + References No definition available. + Details
Name: | bxp_DistributionstoPreferredUnits
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Payments for redemption of preferred units + References No definition available. + Details
Name: | bxp_Paymentsforredemptionofpreferredunits
Namespace Prefix: | bxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_MovementInMinorityInterestRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after tax of income (loss) attributable to redeemable noncontrolling preferred unit holders. + 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 210.5-03.19) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersRedeemable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (12)(c) -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (16)(c) -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 15 -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 14 -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 + Details
Name: | us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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