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Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 485,322 | $ 424,927 | $ 1,416,659 | $ 1,240,335
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 412,137 | 360,234 | 1,200,884 | 1,050,704
United Kingdom |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 42,094 | 38,164 | 124,605 | 109,972
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 13,269 | 11,894 | 39,403 | 35,050
Ireland |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 17,696 | 14,505 | 51,384 | 44,184
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 126 | 130 | 383 | 425
Investment management fees from pooled investment products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 125,344 | 114,496 | 367,763 | 337,352
Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 118,121 | 99,034 | 340,488 | 288,143
Investment operations fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 137,341 | 113,483 | 395,535 | 329,675
Investment processing fees - PaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 54,191 | 47,393 | 160,813 | 137,737
Investment processing fees - SaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 32,427 | 31,046 | 96,240 | 94,905
Professional services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,045 | 7,679 | 15,394 | 16,209
Account fees and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 12,853 | 11,796 | 40,426 | 36,314
Private Banks |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 123,018 | 114,792 | 364,302 | 335,739
Private Banks | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 77,260 | 74,633 | 231,203 | 220,254
Private Banks | United Kingdom |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 28,767 | 25,234 | 83,514 | 71,938
Private Banks | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 12,343 | 10,596 | 35,977 | 30,723
Private Banks | Ireland |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,648 | 4,329 | 13,608 | 12,824
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 | 34,212 | 32,256 | 100,484 | 95,407
Private Banks | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 605 | 421 | 1,681 | 1,060
Private Banks | Investment operations fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 363 | 446 | 1,134 | 1,359
Private Banks | Investment processing fees - PaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 54,191 | 47,393 | 160,813 | 137,737
Private Banks | Investment processing fees - SaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 28,579 | 27,567 | 84,831 | 84,783
Private Banks | Professional services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,174 | 5,663 | 12,509 | 11,535
Private Banks | Account fees and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 894 | 1,046 | 2,850 | 3,858
Investment Advisors |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 124,768 | 103,189 | 357,458 | 299,218
Investment Advisors | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 124,768 | 103,189 | 357,458 | 299,218
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 | 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 | 77,123 | 68,287 | 224,816 | 200,718
Investment Advisors | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 41,688 | 29,761 | 114,747 | 83,726
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 | 5,957 | 5,141 | 17,895 | 14,774
Institutional Investors |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 85,759 | 79,583 | 255,957 | 235,309
Institutional Investors | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 68,810 | 62,699 | 203,322 | 185,202
Institutional Investors | United Kingdom |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 13,327 | 12,930 | 41,091 | 38,034
Institutional Investors | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 926 | 1,298 | 3,426 | 4,327
Institutional Investors | Ireland |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 2,570 | 2,526 | 7,735 | 7,321
Institutional Investors | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 126 | 130 | 383 | 425
Institutional Investors | Investment management fees from pooled investment products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 13,639 | 13,417 | 41,365 | 39,628
Institutional Investors | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 71,964 | 65,811 | 213,249 | 194,445
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 | 0 | 0 | 0 | 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 | 156 | 355 | 1,343 | 1,236
Investment Managers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 147,412 | 123,846 | 426,639 | 359,815
Investment Managers | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 136,934 | 116,196 | 396,598 | 335,776
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 | 10,478 | 7,650 | 30,041 | 24,039
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 | 32 | 180 | 105 | 536
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 | 136,978 | 113,037 | 394,401 | 328,316
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 | 3,848 | 3,479 | 11,409 | 10,122
Investment Managers | Professional services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 871 | 2,016 | 2,885 | 4,674
Investment Managers | Account fees and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,683 | 5,134 | 17,839 | 16,167
Investments In New Businesses |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,365 | 3,517 | 12,303 | 10,254
Investments In New Businesses | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,365 | 3,517 | 12,303 | 10,254
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 | 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 | 338 | 356 | 993 | 1,063
Investments In New Businesses | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 3,864 | 3,041 | 10,811 | 8,912
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 | $ 163 | $ 120 | $ 499 | $ 279

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. 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