v3.3.0.814
Summary of Changes in Financial Liabilities 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, 2014
Sep. 30, 2015
Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Balance, Beginning of Period $ 6,882,595 $ 6,797,104 $ 8,913,007
Transfer In Due to Consolidation and Acquisition [1] 525,438   1,083,638
Transfer Out Due to Deconsolidation (882,510) (4,430,339) (2,509,154)
Transfer Out Due to Amended CLO Guidance [2]   (2,366,765)  
Issuances     42,197
Settlements (570,785)   (1,569,526)
Changes in (Gains) Losses Included in Earnings and Other Comprehensive Income (Loss) (271,818)   (277,242)
Balance, End of Period 5,682,920   5,682,920
Changes in Unrealized (Gains) Losses Included in Earnings Related to Liabilities Still Held at the Reporting Date (273,640)   (283,156)
Collateralized Loan Obligations Senior Notes      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Balance, Beginning of Period 6,407,838 6,448,352 8,302,572
Transfer In Due to Consolidation and Acquisition [1] 495,610   967,629
Transfer Out Due to Deconsolidation (778,461) (4,168,405) (2,231,853)
Transfer Out Due to Amended CLO Guidance [2]   (2,279,947)  
Issuances     32,197
Settlements (570,785)   (1,569,416)
Changes in (Gains) Losses Included in Earnings and Other Comprehensive Income (Loss) (231,554)   (178,481)
Balance, End of Period 5,322,648   5,322,648
Changes in Unrealized (Gains) Losses Included in Earnings Related to Liabilities Still Held at the Reporting Date (233,376)   (184,395)
Collateralized Loan Obligations Subordinated Notes      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Balance, Beginning of Period 474,757 348,752 610,435
Transfer In Due to Consolidation and Acquisition [1] 29,828   116,009
Transfer Out Due to Deconsolidation (104,049) (261,934) (277,301)
Transfer Out Due to Amended CLO Guidance [2]   $ (86,818)  
Issuances     10,000
Settlements     (110)
Changes in (Gains) Losses Included in Earnings and Other Comprehensive Income (Loss) (40,264)   (98,761)
Balance, End of Period 360,272   360,272
Changes in Unrealized (Gains) Losses Included in Earnings Related to Liabilities Still Held at the Reporting Date $ (40,264)   $ (98,761)
[1] Represents the transfer into Level III of financial assets and liabilities as a result of the consolidation of certain fund entities.
[2] Transfers out due to amended CLO measurement guidance represents the transfer out of Level III for liabilities of consolidated CLO vehicles for which fair value is based on the more observable fair value of CLO assets. Such liabilities are classified as Level II within the fair value hierarchy. As the guidance was adopted as of January 1, 2015, there are no transfers for the three months ending September 30, 2015.