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Segment Reporting - Reportable Segment Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues |  |  |
Advisory fees | $ 218,465 | $ 297,944 | $ 182,816
Other income | 981 | 998 | 946
Total revenues | 219,446 | 298,942 | 183,762
Income/(loss) before taxes |  |  |
Total income before taxes | 55,562 | 137,185 | 73,548
U.S. Business segment [Member] |  |  |
Revenues |  |  |
Advisory fees | 211,066 | 293,788 | 181,987
Other income | 1,424 | 931 | 960
Total revenues | 212,490 | 294,719 | 182,947
Income/(loss) before taxes |  |  |
Total income before taxes | 74,721 | 146,335 | 78,631
International Business Segment [Member] |  |  |
Revenues |  |  |
Advisory fees | 7,399 | 4,156 | 829
Other income | (443) | 67 | (14)
Total revenues | 6,956 | 4,223 | 815
Income/(loss) before taxes |  |  |
Total income before taxes | $ (19,159) | $ (9,150) | $ (5,083)

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