|
Clawback Obligations by Segment (Detail) (USD $)
In Thousands, unless otherwise specified
|
Mar. 31, 2015
|
Dec. 31, 2014
|
| Schedule Of Commitments And Contingencies [Line Items] |
|
|
| Clawback obligations |
$ 3,369bx_ClawbackObligations |
$ 3,889bx_ClawbackObligations |
| Real Estate Segment |
|
|
| Schedule Of Commitments And Contingencies [Line Items] |
|
|
| Clawback obligations |
1,590bx_ClawbackObligations
/ us-gaap_StatementBusinessSegmentsAxis
= bx_RealEstateSegmentMember |
1,777bx_ClawbackObligations
/ us-gaap_StatementBusinessSegmentsAxis
= bx_RealEstateSegmentMember |
| Credit Segment |
|
|
| Schedule Of Commitments And Contingencies [Line Items] |
|
|
| Clawback obligations |
1,779bx_ClawbackObligations
/ us-gaap_StatementBusinessSegmentsAxis
= bx_CreditSegmentMember |
2,112bx_ClawbackObligations
/ us-gaap_StatementBusinessSegmentsAxis
= bx_CreditSegmentMember |
| Blackstone Holdings Finance Co. L.L.C. |
|
|
| Schedule Of Commitments And Contingencies [Line Items] |
|
|
| Clawback obligations partnerships |
1,170bx_ClawbackObligationsPartnerships
/ dei_LegalEntityAxis
= bx_BlackstoneHoldingsMember |
1,371bx_ClawbackObligationsPartnerships
/ dei_LegalEntityAxis
= bx_BlackstoneHoldingsMember |
| Blackstone Holdings Finance Co. L.L.C. | Real Estate Segment |
|
|
| Schedule Of Commitments And Contingencies [Line Items] |
|
|
| Clawback obligations partnerships |
130bx_ClawbackObligationsPartnerships
/ dei_LegalEntityAxis
= bx_BlackstoneHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= bx_RealEstateSegmentMember |
130bx_ClawbackObligationsPartnerships
/ dei_LegalEntityAxis
= bx_BlackstoneHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= bx_RealEstateSegmentMember |
| Blackstone Holdings Finance Co. L.L.C. | Credit Segment |
|
|
| Schedule Of Commitments And Contingencies [Line Items] |
|
|
| Clawback obligations partnerships |
1,040bx_ClawbackObligationsPartnerships
/ dei_LegalEntityAxis
= bx_BlackstoneHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= bx_CreditSegmentMember |
1,241bx_ClawbackObligationsPartnerships
/ dei_LegalEntityAxis
= bx_BlackstoneHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= bx_CreditSegmentMember |
| Current And Former Blackstone Personnel |
|
|
| Schedule Of Commitments And Contingencies [Line Items] |
|
|
| Clawback obligations Current and Former Personnel |
2,199bx_ClawbackObligationsCurrentAndFormerPersonnel
/ dei_LegalEntityAxis
= bx_CurrentAndFormerBlackstonePersonnelMember |
2,518bx_ClawbackObligationsCurrentAndFormerPersonnel
/ dei_LegalEntityAxis
= bx_CurrentAndFormerBlackstonePersonnelMember |
| Current And Former Blackstone Personnel | Real Estate Segment |
|
|
| Schedule Of Commitments And Contingencies [Line Items] |
|
|
| Clawback obligations Current and Former Personnel |
1,460bx_ClawbackObligationsCurrentAndFormerPersonnel
/ dei_LegalEntityAxis
= bx_CurrentAndFormerBlackstonePersonnelMember
/ us-gaap_StatementBusinessSegmentsAxis
= bx_RealEstateSegmentMember |
1,647bx_ClawbackObligationsCurrentAndFormerPersonnel
/ dei_LegalEntityAxis
= bx_CurrentAndFormerBlackstonePersonnelMember
/ us-gaap_StatementBusinessSegmentsAxis
= bx_RealEstateSegmentMember |
| Current And Former Blackstone Personnel | Credit Segment |
|
|
| Schedule Of Commitments And Contingencies [Line Items] |
|
|
| Clawback obligations Current and Former Personnel |
$ 739bx_ClawbackObligationsCurrentAndFormerPersonnel
/ dei_LegalEntityAxis
= bx_CurrentAndFormerBlackstonePersonnelMember
/ us-gaap_StatementBusinessSegmentsAxis
= bx_CreditSegmentMember |
$ 871bx_ClawbackObligationsCurrentAndFormerPersonnel
/ dei_LegalEntityAxis
= bx_CurrentAndFormerBlackstonePersonnelMember
/ us-gaap_StatementBusinessSegmentsAxis
= bx_CreditSegmentMember |