Segment Information - Segment's Contribution with Respect to Net Revenue, Operating Expenses, Operating Income (Loss) and Total Assets (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
---|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
Dec. 31, 2017 |
|
Segment Reporting Information [Line Items] | |||||
Net Revenue | $ 757,938 | $ 717,180 | $ 1,512,636 | $ 1,340,644 | |
Operating Expenses | 557,998 | 544,679 | 1,126,868 | 1,017,946 | |
Operating Income (Loss) | 199,940 | 172,501 | 385,768 | 322,698 | |
Total Assets | 4,627,992 | 4,627,992 | $ 4,928,677 | ||
Operating Segments [Member] | Financial Advisory Segment [Member] | |||||
Segment Reporting Information [Line Items] | |||||
Net Revenue | 422,089 | 410,882 | 831,210 | 746,694 | |
Operating Expenses | 318,177 | 313,719 | 642,873 | 576,470 | |
Operating Income (Loss) | 103,912 | 97,163 | 188,337 | 170,224 | |
Total Assets | 877,678 | 877,678 | 843,142 | ||
Operating Segments [Member] | Asset Management Segment [Member] | |||||
Segment Reporting Information [Line Items] | |||||
Net Revenue | 352,588 | 309,878 | 706,871 | 593,241 | |
Operating Expenses | 229,561 | 215,901 | 459,230 | 404,652 | |
Operating Income (Loss) | 123,027 | 93,977 | 247,641 | 188,589 | |
Total Assets | 709,833 | 709,833 | 756,398 | ||
Corporate [Member] | |||||
Segment Reporting Information [Line Items] | |||||
Net Revenue | (16,739) | (3,580) | (25,445) | 709 | |
Operating Expenses | 10,260 | 15,059 | 24,765 | 36,824 | |
Operating Income (Loss) | (26,999) | $ (18,639) | (50,210) | $ (36,115) | |
Total Assets | $ 3,040,481 | $ 3,040,481 | $ 3,329,137 |