v3.3.0.814
Summary of Changes in Financial Assets Measured at Fair Value for Which Level III Inputs Were Used (Detail) - Level 3 - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Balance, Beginning of Period $ 1,125,323 $ 2,471,097 $ 2,624,602 [1] $ 2,643,469 [1]
Transfer In Due to Consolidation and Acquisition [2]       205,890
Transfer In (Out) Due to Deconsolidation   (64,634) (1,460,538) (335,357)
Transfer In to Level III [3] 49,114 181,784 72,127 302,358
Transfer Out of Level III [3] (152,702) (222,021) (237,765) (335,724)
Purchases 271,974 255,007 492,835 662,387
Sales (142,021) (239,380) (370,421) (862,641)
Settlements (1,545) (649) (3,843) (1,594)
Changes in Gains (Losses) Included in Earnings and Other Comprehensive Income (Loss) 15,265 3,449 48,411 105,865
Balance, End of Period 1,165,408 2,384,653 1,165,408 2,384,653
Changes in Unrealized Gains (Losses) Included in Earnings Related to Investments Still Held at the Reporting Date (43,482) (16,376) (24,438) 89,619
Loans and Receivables        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Balance, Beginning of Period 36,440 42,725 40,397 [1] 137,788 [1]
Purchases 144,058 69,255 150,244 162,899
Sales   (42,261) (9,535) (230,324)
Settlements (1,405) (526) (3,485) (1,170)
Changes in Gains (Losses) Included in Earnings and Other Comprehensive Income (Loss) 162 601 1,634 601
Balance, End of Period 179,255 69,794 179,255 69,794
Changes in Unrealized Gains (Losses) Included in Earnings Related to Investments Still Held at the Reporting Date 162 601 1,505 601
Investments Of Consolidated Funds        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Balance, Beginning of Period 937,149 2,260,856 2,394,821 [1] 2,460,908 [1]
Transfer In Due to Consolidation and Acquisition [2]       205,890
Transfer In (Out) Due to Deconsolidation   (64,634) (1,460,538) (335,357)
Transfer In to Level III [3] 43,920 161,332 47,035 273,934
Transfer Out of Level III [3] (143,531) (212,108) (181,429) (315,067)
Purchases 122,676 165,838 304,012 346,144
Sales (139,229) (190,383) (321,121) (618,008)
Changes in Gains (Losses) Included in Earnings and Other Comprehensive Income (Loss) 16,871 11,581 55,076 114,038
Balance, End of Period 837,856 2,132,482 837,856 2,132,482
Changes in Unrealized Gains (Losses) Included in Earnings Related to Investments Still Held at the Reporting Date (41,807) (8,606) (25,614) 96,217
Other        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Balance, Beginning of Period [4] 151,734 167,516 189,384 [1] 44,773 [1]
Transfer In to Level III [3],[4] 5,194 20,452 25,092 28,424
Transfer Out of Level III [3],[4] (9,171) (9,913) (56,336) (20,657)
Purchases [4] 5,240 19,914 38,579 153,344
Sales [4] (2,792) (6,736) (39,765) (14,309)
Settlements [4] (140) (123) (358) (424)
Changes in Gains (Losses) Included in Earnings and Other Comprehensive Income (Loss) [4] (1,768) (8,733) (8,299) (8,774)
Balance, End of Period [4] 148,297 182,377 148,297 182,377
Changes in Unrealized Gains (Losses) Included in Earnings Related to Investments Still Held at the Reporting Date [4] $ (1,837) $ (8,371) $ (329) $ (7,199)
[1] Beginning of period 2015 balances have been adjusted to remove investments for which fair value is based on NAV. Pursuant to amended fair value guidance, disclosure in the fair value hierarchy is no longer required.
[2] Represents the transfer into Level III of financial assets and liabilities as a result of the consolidation of certain fund entities.
[3] Transfers in and out of Level III financial assets and liabilities were due to changes in the observability of inputs used in the valuation of such assets and liabilities.
[4] Represents Blackstone's Treasury Cash Management Strategies and Other Investments.