v2.4.0.8
Assets and Liabilities Related to Interest in Non-Consolidated VIEs and Maximum Exposure to Loss (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Variable Interest Entity [Line Items]    
Investments $ 560,879 $ 364,709
Accounts Receivable 83,495 1,885
Due from Affiliates 62,340 112,686
Total VIE Assets 706,714 479,280
Due to Affiliates 442 2,657
Accounts Payable, Accrued Expenses and Other Liabilities 3  
Potential Clawback Obligation 55,574 36,040
Maximum Exposure to Loss $ 762,733 $ 517,977