Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues
Management and Advisory Fees, Net	$ 2,030,693	$ 1,811,750	$ 1,584,748
Performance Fees
Performance Fees Realized - Carried Interest	327,422	138,907	244,963
Performance Fees Realized - Incentive Fees	301,801	90,099	121,758
Performance Fees Unrealized - Carried Interest	994,190	971,518	457,002
Performance Fees Unrealized - Incentive Fees	(30,361)	(17,864)	114,111
Total Performance Fees	1,593,052	1,182,660	937,834
Investment Income
Realized	93,963	87,542	29,157
Unrealized	256,231	125,781	532,004
Total Investment Income	350,194	213,323	561,161
Interest and Dividend Revenue	40,354	37,427	36,218
Other	5,148	7,416	(619)
Total Revenues	4,019,441	3,252,576	3,119,342
Expenses
Compensation	2,091,698	2,421,712	3,253,226
Performance Fee Compensation
Performance Fee Compensation - Realized Carried Interest	96,433	43,615	70,716
Performance Fee Compensation - Realized Incentive Fees	140,042	55,912	57,600
Performance Fee Compensation - Unrealized Carried Interest	321,599	237,945	165,340
Performance Fee Compensation - Unrealized Incentive Fees	(44,528)	(20,759)	63,307
Total Compensation and Benefits	2,605,244	2,738,425	3,610,189
General, Administrative and Other	548,738	566,313	466,358
Interest Expense	72,870	57,824	41,229
Fund Expenses	33,829	25,507	26,214
Total Expenses	3,260,681	3,388,069	4,143,990
Other Income
Reversal of Tax Receivable Agreement Liability		197,816
Net Gains from Fund Investment Activities	256,145	14,935	501,994
Total Other Income	256,145	212,751	501,994
Income (Loss) Before Provision for Taxes	1,014,905	77,258	(522,654)
Provision for Taxes	185,023	345,711	84,669
Net Income (Loss)	829,882	(268,453)	(607,323)
Net Income (Loss) Attributable to Redeemable Non-Controlling Interests in Consolidated Entities	103,598	(24,869)	87,651
Net Income Attributable to Non-Controlling Interests in Consolidated Entities	99,959	7,953	343,498
Net Income (Loss) Attributable to Non-Controlling Interests in Blackstone Holdings	407,727	(83,234)	(668,444)
Net Income (Loss) Attributable to The Blackstone Group L.P.	218,598	(168,303)	(370,028)
Distributions Declared per Common Unit	$ 0.52	$ 0.62	$ 0.60
Net Income (Loss) Per Common Unit
Common Units, Basic and Diluted	$ 0.41	$ (0.35)	$ (1.02)
Weighted-Average Common Units Outstanding
Common Units, Basic	533,703,606	475,582,718	364,021,369
Common Units, Diluted	538,669,070	475,582,718	364,021,369
Revenues Earned from Affiliates
Management and Advisory Fees	$ 254,729	$ 317,675	$ 189,006