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Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 537,396 | $ 476,759 | $ 1,567,961 | $ 1,434,935
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 458,263 | 406,184 | 1,339,455 | 1,225,864
United Kingdom |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 41,500 | 37,231 | 121,569 | 110,814
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 11,866 | 11,491 | 34,618 | 34,544
Ireland |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 17,804 | 15,639 | 50,576 | 46,282
Luxembourg |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 7,963 | 6,214 | 21,743 | 17,431
Investment management fees from pooled investment products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 106,777 | 104,461 | 314,062 | 315,843
Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 110,022 | 104,632 | 323,141 | 313,567
Investment operations fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 189,048 | 157,056 | 546,811 | 457,647
Investment processing fees - PaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 78,266 | 62,131 | 222,989 | 189,994
Investment processing fees - SaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 28,537 | 28,531 | 87,878 | 87,332
Professional services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 6,487 | 4,909 | 19,128 | 25,827
Account fees and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 18,259 | 15,039 | 53,952 | 44,725
Private Banks |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 138,734 | 119,664 | 401,272 | 372,980
Private Banks | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 90,549 | 76,501 | 262,886 | 244,614
Private Banks | United Kingdom |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 32,062 | 28,789 | 93,264 | 84,581
Private Banks | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,368 | 10,060 | 30,234 | 30,297
Private Banks | Ireland |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,755 | 4,314 | 14,888 | 13,488
Private Banks | Luxembourg |  |  |  |
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 | 34,899 | 32,119 | 99,913 | 96,431
Private Banks | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,133 | 900 | 3,229 | 2,211
Private Banks | Investment operations fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 570 | 336 | 1,650 | 1,019
Private Banks | Investment processing fees - PaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 75,283 | 59,563 | 214,001 | 182,305
Private Banks | Investment processing fees - SaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 21,296 | 21,865 | 66,065 | 66,596
Private Banks | Professional services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,806 | 4,109 | 14,042 | 21,873
Private Banks | Account fees and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 747 | 772 | 2,372 | 2,545
Private Banks | Professional services fees, one-time early termination fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues |  |  |  | 10,457
Investment Advisors |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 126,836 | 110,461 | 370,141 | 326,579
Investment Advisors | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 126,836 | 110,461 | 370,141 | 326,579
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 | 0 | 0
Investment Advisors | Investment management fees from pooled investment products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 59,707 | 60,046 | 176,368 | 181,754
Investment Advisors | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 49,864 | 45,175 | 144,203 | 129,000
Investment Advisors | Investment operations fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,670 | 2 | 30,397 | 4
Investment Advisors | Investment processing fees - PaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,449 | 1,271 | 4,109 | 3,786
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 | 5,146 | 3,967 | 15,064 | 12,035
Institutional Investors |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 71,626 | 70,479 | 214,911 | 219,914
Institutional Investors | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 58,870 | 58,992 | 177,134 | 184,354
Institutional Investors | United Kingdom |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 9,438 | 8,442 | 28,305 | 26,233
Institutional Investors | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,498 | 1,431 | 4,384 | 4,247
Institutional Investors | Ireland |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,820 | 1,614 | 5,088 | 5,080
Institutional Investors | Luxembourg |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 0 | 0 | 0
Institutional Investors | Investment management fees from pooled investment products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 11,854 | 11,858 | 36,185 | 36,299
Institutional Investors | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 54,296 | 54,317 | 162,046 | 169,874
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 | 260 | 198 | 1,081 | 696
Institutional Investors | Investment processing fees - SaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 2,004 | 2,291 | 6,335 | 7,733
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 | 3,212 | 1,815 | 9,264 | 5,312
Investment Managers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 184,607 | 162,982 | 537,128 | 476,683
Investment Managers | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 166,415 | 147,057 | 484,785 | 431,538
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 | 10,229 | 9,711 | 30,600 | 27,714
Investment Managers | Luxembourg |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 7,963 | 6,214 | 21,743 | 17,431
Investment Managers | Investment management fees from pooled investment products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | (191) | 87 | 273 | 318
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 | 176,687 | 155,251 | 511,203 | 452,297
Investment Managers | Investment processing fees - PaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,267 | 1,086 | 3,772 | 3,174
Investment Managers | Investment processing fees - SaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 18 | 19 | 54
Investment Managers | Professional services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 631 | 582 | 2,749 | 3,202
Investment Managers | Account fees and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 6,213 | 5,958 | 19,112 | 17,638
Investments In New Businesses |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 15,593 | 13,173 | 44,509 | 38,779
Investments In New Businesses | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 15,593 | 13,173 | 44,509 | 38,779
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 | 0 | 0
Investments In New Businesses | Investment management fees from pooled investment products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 508 | 351 | 1,323 | 1,041
Investments In New Businesses | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,729 | 4,240 | 13,663 | 12,482
Investments In New Businesses | Investment operations fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,121 | 1,467 | 3,561 | 4,327
Investments In New Businesses | Investment processing fees - PaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 7 | 13 | 26 | 33
Investments In New Businesses | Investment processing fees - SaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,237 | 4,357 | 15,459 | 12,949
Investments In New Businesses | Professional services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,050 | 218 | 2,337 | 752
Investments In New Businesses | Account fees and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 2,941 | $ 2,527 | $ 8,140 | $ 7,195

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