Revenues from Contracts with Customers - Summary of Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues [Line Items] | ||
Total revenues from contracts with customers | $ 58,756 | |
Total revenues | 59,605 | $ 54,599 |
Advisory Fees [Member] | ||
Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues [Line Items] | ||
Total revenues from contracts with customers | 58,455 | |
Other [Member] | ||
Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues [Line Items] | ||
Total revenues from contracts with customers | 301 | |
Other Sources of Revenues [Member] | ||
Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues [Line Items] | ||
Total revenues | $ 849 |