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Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 1,919,793 | $ 1,991,037 | $ 1,918,309
United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 1,640,109 | 1,623,022 | 1,629,527
United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 147,800 | 242,071 | 165,788
Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 45,626 | 48,419 | 52,721
Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 62,524 | 60,365 | 69,770
Luxembourg |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 23,734 | 16,898 |
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues |  | 262 | 503
Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 416,358 | 445,224 | 495,378
Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 417,368 | 432,322 | 458,087
Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 618,401 | 579,813 | 539,958
Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 254,304 | 234,278 | 223,009
Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 117,456 | 139,102 | 128,963
Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 31,375 | 104,842 | 25,562
Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 64,531 | 55,456 | 47,352
Private Banks |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 503,317 | 575,625 | 493,570
Private Banks | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 332,543 | 317,399 | 315,040
Private Banks | United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 113,221 | 199,294 | 111,900
Private Banks | Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 39,974 | 43,108 | 48,325
Private Banks | Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 17,579 | 15,824 | 18,305
Private Banks | Luxembourg |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 |
Private Banks | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues |  | 0 | 0
Private Banks | Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 127,388 | 125,430 | 134,617
Private Banks | Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 3,091 | 2,187 | 2,271
Private Banks | Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 1,572 | 1,410 | 1,512
Private Banks | Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 248,926 | 228,556 | 215,473
Private Banks | Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 90,150 | 112,096 | 113,964
Private Banks | Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 28,069 | 102,169 | 22,054
Private Banks | Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 4,121 | 3,777 | 3,679
Private Banks | Professional services fees, one-time early termination fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 10,457 | 88,000 |
Investment Advisors |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 436,298 | 447,766 | 482,949
Investment Advisors | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 436,298 | 447,766 | 482,949
Investment Advisors | United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investment Advisors | Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investment Advisors | Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 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
Investment Advisors | Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 239,244 | 263,266 | 301,581
Investment Advisors | Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 174,418 | 162,762 | 158,181
Investment Advisors | Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investment Advisors | Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 4,635 | 5,100 | 6,907
Investment Advisors | Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investment Advisors | Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investment Advisors | Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 18,001 | 16,638 | 16,280
Institutional Investors |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 289,708 | 323,353 | 343,805
Institutional Investors | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 242,945 | 267,928 | 274,867
Institutional Investors | United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 34,485 | 42,777 | 53,888
Institutional Investors | Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 5,652 | 5,311 | 4,396
Institutional Investors | Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 6,626 | 7,075 | 10,151
Institutional Investors | Luxembourg |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 |
Institutional Investors | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues |  | 262 | 503
Institutional Investors | Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 47,943 | 54,656 | 57,716
Institutional Investors | Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 223,212 | 251,256 | 282,797
Institutional Investors | Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Institutional Investors | Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 457 | 396 | 308
Institutional Investors | Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 10,118 | 11,425 | 1,207
Institutional Investors | Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Institutional Investors | Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 7,978 | 5,620 | 1,777
Investment Managers |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 670,486 | 624,918 | 581,157
Investment Managers | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 608,339 | 570,554 | 539,843
Investment Managers | United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 94 | 0 | 0
Investment Managers | Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investment Managers | Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 38,319 | 37,466 | 41,314
Investment Managers | Luxembourg |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 23,734 | 16,898 |
Investment Managers | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues |  | 0 | 0
Investment Managers | Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 401 | 396 | 134
Investment Managers | Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investment Managers | Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 616,829 | 578,403 | 538,446
Investment Managers | Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 244 | 186 | 300
Investment Managers | Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 17,188 | 15,581 | 13,792
Investment Managers | Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 3,306 | 2,673 | 3,508
Investment Managers | Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 32,518 | 27,679 | 24,977
Investments in New Businesses |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 19,984 | 19,375 | 16,828
Investments in New Businesses | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 19,984 | 19,375 | 16,828
Investments in New Businesses | United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investments in New Businesses | Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investments in New Businesses | Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 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
Investments in New Businesses | Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 1,382 | 1,476 | 1,330
Investments in New Businesses | Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 16,647 | 16,117 | 14,838
Investments in New Businesses | Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investments in New Businesses | Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 42 | 40 | 21
Investments in New Businesses | Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investments in New Businesses | Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 0 | 0 | 0
Investments in New Businesses | Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 1,913 | $ 1,742 | $ 639

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