Related Party Transactions (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Related party assets          
Cash and cash equivalents $ 78,963   $ 78,963   $ 51,491
Related party liabilities          
Other liabilities (promissory note) 20,000   20,000   14,478
Related party revenue          
Total revenue 214,980 $ 108,082 393,819 $ 317,445  
Investment management fees          
Related party revenue          
Total revenue 155,406 92,525 307,859 270,653  
Fund administration and distribution fees          
Related party revenue          
Total revenue 59,574 15,557 85,960 46,792  
VCH          
Related party assets          
Cash and cash equivalents 10,025   10,025    
Receivables (Investment management fees) 45,044   45,044   19,612
Receivables (Fund administration and distribution fees) 18,938   18,938   3,153
Investments (Available-for-sale securities, fair value) 698   698   601
Investments (Trading securities, at fair value) 15,943   15,943   12,343
Total 90,648   90,648   35,709
Related party liabilities          
Accounts payable and accrued expenses (fund reimbursements) 6,073   6,073   2,300
Other liabilities (promissory note)         96
Total 6,073   6,073   $ 2,396
Related party revenue          
Total revenue 189,935 83,943 325,829 247,520  
Related party expense          
Distribution and other asset-based expenses (fund reimbursements)   3,072   9,352  
General and administrative       135  
Total   3,072   9,487  
Related party other income (expense)          
Interest income/(expense) and other income/(expense) (342)   1,474    
Interest income/(expense) and other financing costs (promissory note)   (5) (1) (16)  
Total (342) (5) 1,473 (16)  
VCH | Investment management fees          
Related party revenue          
Total revenue 130,361 68,386 239,869 200,728  
VCH | Fund administration and distribution fees          
Related party revenue          
Total revenue $ 59,574 $ 15,557 $ 85,960 $ 46,792