v3.3.0.814

Due from Affiliates and Due to Affiliates (Detail) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Related Party Transaction [Line Items] |  |
Accrual for Potential Clawback of Previously Distributed Carried Interest | $ 495 | $ 2,518
Primarily Interest Bearing Advances Made on Behalf of Certain Non-Controlling Interest Holders and Blackstone Employees for Investments in Blackstone Funds | 279,592 | 237,341
Amounts Due from Portfolio Companies and Funds | 375,633 | 372,820
Investments Redeemed in Non-Consolidated Funds of Hedge Funds | 4,456 | 32,020
Management and Performance Fees Due from Non-Consolidated Funds | 360,291 | 355,657
Payments Made on Behalf of Non-Consolidated Entities | 169,049 | 111,796
Advances Made to Certain Non-Controlling Interest Holders and Blackstone Employees | 21,142 | 16,256
Due from Affiliates, total | 1,210,658 | 1,128,408
Due to Certain Non-Controlling Interest Holders in Connection with the Tax Receivable Agreements | 1,272,807 | 1,234,890
Accrual for Potential Repayment of Previously Received Performance Fees | 1,177 | 3,889
Due to Note Holders of Consolidated CLO Vehicles | 8,851 | 16,881
Distributions Received on Behalf of Certain Non-Controlling Interest Holders and Blackstone Employees | 21,222 | 21,266
Payable to Affiliates for Consolidated Funds |  | 22,447
Distributions Received on Behalf of Blackstone Entities | 72,431 | 176,304
Payments Made by Non-Consolidated Entities | 10,682 | 14,411
Due to Affiliates, total | $ 1,387,170 | $ 1,490,088

X
- Definition Accrual For Potential Clawback Of Previously Distributed Interest + References No definition available. + Details
Name: | bx_AccrualForPotentialClawbackOfPreviouslyDistributedInterest
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Clawback Obligations + References No definition available. + Details
Name: | bx_ClawbackObligations
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Distributions Received On Behalf Of Certain Non Controlling Interest Holders And Company Employees + References No definition available. + Details
Name: | bx_DistributionsReceivedOnBehalfOfCertainNonControllingInterestHoldersAndCompanyEmployees
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Distributions Received on Behalf of Non-Consolidated Entities + References No definition available. + Details
Name: | bx_DistributionsReceivedOnBehalfOfNonConsolidatedEntities
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Due to certain non-controlling interest holders in connection with tax receivable agreements + References No definition available. + Details
Name: | bx_DueToCertainNonControllingInterestHoldersInConnectionWithTaxReceivableAgreements
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Due To Note Holders Of Consolidated CLO Vehicles + References No definition available. + Details
Name: | bx_DueToNoteHoldersOfConsolidatedCloVehicles
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Investments Redeemed in Non-Consolidated Funds of Hedge Funds + References No definition available. + Details
Name: | bx_InvestmentsRedeemedInNonConsolidatedFundsOfHedgeFunds
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Management And Performance Fees Due From Non Consolidated Funds + References No definition available. + Details
Name: | bx_ManagementAndPerformanceFeesDueFromNonConsolidatedFunds
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Payable to affiliates for consolidated funds in liquidation + References No definition available. + Details
Name: | bx_PayableToAffiliatesForConsolidatedFundsInLiquidation
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Payments Made by Non-Consolidated Entities + References No definition available. + Details
Name: | bx_PaymentsMadeByNonConsolidatedEntities
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Payments Made on Behalf of Non-Consolidated Entities + References No definition available. + Details
Name: | bx_PaymentsMadeOnBehalfOfNonConsolidatedEntities
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Primarily interest bearing advances made on behalf of certain non-controlling interest holders and company employees for investments in Company funds + References No definition available. + Details
Name: | bx_PrimarilyInterestBearingAdvancesMadeOnBehalfOfCertainNonControllingInterestHoldersAndCompanyEmployeesForInvestmentsInCompanyFunds
Namespace Prefix: | bx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Long-Term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. This does not include advances to clients. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04.2) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 + Details
Name: | us-gaap_AdvancesToAffiliate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition For an unclassified balance sheet, amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.3) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 + Details
Name: | us-gaap_DueFromAffiliates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.3) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_DueFromRelatedParties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of obligations due all related parties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(3),(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.17) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_DueToRelatedPartiesCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration