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Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | $ 471,334 |  | $ 485,322 | $ 1,534,447 | $ 1,416,659
United States |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 403,526 |  | 412,137 | 1,234,242 | 1,200,884
United Kingdom |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 36,915 |  | 42,094 | 204,803 | 124,605
Canada |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 11,852 |  | 13,269 | 37,341 | 39,403
Ireland |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 14,501 |  | 17,696 | 46,078 | 51,384
Luxembourg |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 4,507 |  |  | 11,721 |
Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 33 |  | 126 | 262 | 383
Investment management fees from pooled investment products |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 107,066 |  | 125,344 | 342,202 | 367,763
Investment management fees from investment management agreements |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 105,427 |  | 118,121 | 328,575 | 340,488
Investment operations fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 144,517 |  | 137,341 | 435,342 | 395,535
Investment processing fees - PaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 57,818 |  | 54,191 | 170,651 | 160,813
Investment processing fees - SaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 36,468 |  | 32,427 | 109,572 | 96,240
Professional services fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 3,993 |  | 5,045 | 101,842 | 15,394
Account fees and other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 16,045 |  | 12,853 | 46,263 | 40,426
Private Banks |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 122,660 |  | 123,018 | 460,392 | 364,302
Private Banks | United States |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 81,628 |  | 77,260 | 244,472 | 231,203
Private Banks | United Kingdom |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 27,186 |  | 28,767 | 171,042 | 83,514
Private Banks | Canada |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 10,495 |  | 12,343 | 33,318 | 35,977
Private Banks | Ireland |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 3,351 |  | 4,648 | 11,560 | 13,608
Private Banks | Luxembourg |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  |  | 0 |
Private Banks | Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Private Banks | Investment management fees from pooled investment products |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 30,002 |  | 34,212 | 95,113 | 100,484
Private Banks | Investment management fees from investment management agreements |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 633 |  | 605 | 1,504 | 1,681
Private Banks | Investment operations fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 336 |  | 363 | 1,040 | 1,134
Private Banks | Investment processing fees - PaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 57,818 |  | 54,191 | 170,651 | 160,813
Private Banks | Investment processing fees - SaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 29,855 |  | 28,579 | 89,259 | 84,831
Private Banks | Professional services fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 3,195 |  | 4,174 | 100,020 | 12,509
Private Banks | Account fees and other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 821 |  | 894 | 2,805 | 2,850
Private Banks | Professional services fees, one-time early termination fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues |  | $ 88,000 |  |  |
Investment Advisors |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 109,565 |  | 124,768 | 341,989 | 357,458
Investment Advisors | United States |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 109,565 |  | 124,768 | 341,989 | 357,458
Investment Advisors | United Kingdom |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Advisors | Canada |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Advisors | Ireland |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Advisors | Luxembourg |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  |  | 0 |
Investment Advisors | Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Advisors | Investment management fees from pooled investment products |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 63,688 |  | 77,123 | 203,171 | 224,816
Investment Advisors | Investment management fees from investment management agreements |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 39,915 |  | 41,688 | 122,321 | 114,747
Investment Advisors | Investment operations fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Advisors | Investment processing fees - PaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Advisors | Investment processing fees - SaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Advisors | Professional services fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Advisors | Account fees and other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 5,962 |  | 5,957 | 16,497 | 17,895
Institutional Investors |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 78,260 |  | 85,759 | 248,582 | 255,957
Institutional Investors | United States |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 65,571 |  | 68,810 | 204,836 | 203,322
Institutional Investors | United Kingdom |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 9,729 |  | 13,327 | 33,761 | 41,091
Institutional Investors | Canada |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 1,357 |  | 926 | 4,023 | 3,426
Institutional Investors | Ireland |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 1,570 |  | 2,570 | 5,700 | 7,735
Institutional Investors | Luxembourg |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  |  | 0 |
Institutional Investors | Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 33 |  | 126 | 262 | 383
Institutional Investors | Investment management fees from pooled investment products |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 12,928 |  | 13,639 | 42,494 | 41,365
Institutional Investors | Investment management fees from investment management agreements |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 60,887 |  | 71,964 | 192,559 | 213,249
Institutional Investors | Investment operations fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Institutional Investors | Investment processing fees - PaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Institutional Investors | Investment processing fees - SaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 2,650 |  | 0 | 8,781 | 0
Institutional Investors | Professional services fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Institutional Investors | Account fees and other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 1,795 |  | 156 | 4,748 | 1,343
Investment Managers |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 156,015 |  | 147,412 | 468,842 | 426,639
Investment Managers | United States |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 141,928 |  | 136,934 | 428,303 | 396,598
Investment Managers | United Kingdom |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Managers | Canada |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Managers | Ireland |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 9,580 |  | 10,478 | 28,818 | 30,041
Investment Managers | Luxembourg |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 4,507 |  |  | 11,721 |
Investment Managers | Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Managers | Investment management fees from pooled investment products |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 81 |  | 32 | 288 | 105
Investment Managers | Investment management fees from investment management agreements |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Managers | Investment operations fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 144,181 |  | 136,978 | 434,302 | 394,401
Investment Managers | Investment processing fees - PaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investment Managers | Investment processing fees - SaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 3,963 |  | 3,848 | 11,532 | 11,409
Investment Managers | Professional services fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 798 |  | 871 | 1,822 | 2,885
Investment Managers | Account fees and other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 6,992 |  | 5,683 | 20,898 | 17,839
Investments In New Businesses |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 4,834 |  | 4,365 | 14,642 | 12,303
Investments In New Businesses | United States |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 4,834 |  | 4,365 | 14,642 | 12,303
Investments In New Businesses | United Kingdom |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investments In New Businesses | Canada |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investments In New Businesses | Ireland |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investments In New Businesses | Luxembourg |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  |  | 0 |
Investments In New Businesses | Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investments In New Businesses | Investment management fees from pooled investment products |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 367 |  | 338 | 1,136 | 993
Investments In New Businesses | Investment management fees from investment management agreements |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 3,992 |  | 3,864 | 12,191 | 10,811
Investments In New Businesses | Investment operations fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investments In New Businesses | Investment processing fees - PaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investments In New Businesses | Investment processing fees - SaaS |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investments In New Businesses | Professional services fees |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 |  | 0 | 0 | 0
Investments In New Businesses | Account fees and other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | $ 475 |  | $ 163 | $ 1,315 | $ 499

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