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Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | $ 2,125,151 | $ 1,919,793 | $ 1,991,037
United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 1,816,650 | 1,640,109 | 1,623,022
United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 162,744 | 147,800 | 242,071
Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 46,320 | 45,626 | 48,419
Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 69,329 | 62,524 | 60,365
Luxembourg |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 30,108 | 23,734 | 16,898
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue |  |  | 262
Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 417,501 | 416,358 | 447,282
Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 435,917 | 417,368 | 428,179
Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 749,992 | 619,890 | 579,813
Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 303,102 | 255,248 | 253,033
Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 117,632 | 117,456 | 119,670
Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 26,618 | 31,375 | 107,029
Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 74,389 | 62,098 | 56,031
Investment Managers |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 728,390 | 645,254 | 599,661
Investment Managers | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 655,051 | 583,107 | 545,297
Investment Managers | United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 94 | 0
Investment Managers | Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investment Managers | Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 43,231 | 38,319 | 37,466
Investment Managers | Luxembourg |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 30,108 | 23,734 | 16,898
Investment Managers | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue |  |  | 0
Investment Managers | Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 363 | 401 | 396
Investment Managers | Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investment Managers | Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 691,953 | 611,126 | 572,187
Investment Managers | Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 5,042 | 4,261 | 3,077
Investment Managers | Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 19 | 73 | 70
Investment Managers | Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 3,572 | 3,885 | 3,206
Investment Managers | Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 27,441 | 25,508 | 20,725
Private Banks |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 541,414 | 496,317 | 570,010
Private Banks | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 355,887 | 325,543 | 311,784
Private Banks | United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 125,745 | 113,221 | 199,294
Private Banks | Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 40,564 | 39,974 | 43,108
Private Banks | Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 19,218 | 17,579 | 15,824
Private Banks | Luxembourg |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Private Banks | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue |  |  | 0
Private Banks | Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 133,210 | 127,388 | 125,430
Private Banks | Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 4,302 | 3,091 | 2,187
Private Banks | Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 2,270 | 1,572 | 1,410
Private Banks | Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 290,825 | 244,910 | 242,916
Private Banks | Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 87,938 | 89,708 | 92,377
Private Banks | Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 19,747 | 26,291 | 102,012
Private Banks | Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 3,122 | 3,357 | 3,678
Private Banks | Professional services fees, one-time early termination fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue |  | 10,457 | 88,000
Investment Advisors |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 509,408 | 436,298 | 447,766
Investment Advisors | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 509,408 | 436,298 | 447,766
Investment Advisors | United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investment Advisors | Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investment Advisors | Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investment Advisors | Luxembourg |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investment Advisors | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue |  |  | 0
Investment Advisors | Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 233,992 | 239,244 | 263,266
Investment Advisors | Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 197,638 | 174,418 | 162,762
Investment Advisors | Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 51,550 | 1,490 | 0
Investment Advisors | Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 5,570 | 5,035 | 5,956
Investment Advisors | Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 335 | 0 | 0
Investment Advisors | Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investment Advisors | Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 20,323 | 16,111 | 15,782
Institutional Investors |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 285,723 | 289,708 | 323,353
Institutional Investors | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 236,088 | 242,945 | 267,928
Institutional Investors | United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 36,999 | 34,485 | 42,777
Institutional Investors | Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 5,756 | 5,652 | 5,311
Institutional Investors | Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 6,880 | 6,626 | 7,075
Institutional Investors | Luxembourg |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Institutional Investors | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue |  |  | 262
Institutional Investors | Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 48,215 | 47,943 | 56,714
Institutional Investors | Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 215,464 | 223,212 | 247,113
Institutional Investors | Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 12 | 0 | 0
Institutional Investors | Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 1,631 | 1,000 | 1,044
Institutional Investors | Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 8,172 | 10,118 | 11,425
Institutional Investors | Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Institutional Investors | Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 12,229 | 7,435 | 7,057
Investments in New Businesses |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 60,216 | 52,216 | 50,247
Investments in New Businesses | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 60,216 | 52,216 | 50,247
Investments in New Businesses | United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investments in New Businesses | Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investments in New Businesses | Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investments in New Businesses | Luxembourg |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 0 | 0 | 0
Investments in New Businesses | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue |  |  | 0
Investments in New Businesses | Investment management fees from pooled investment products |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 1,721 | 1,382 | 1,476
Investments in New Businesses | Investment management fees from investment management agreements |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 18,513 | 16,647 | 16,117
Investments in New Businesses | Investment operations fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 4,207 | 5,702 | 6,216
Investments in New Businesses | Investment processing fees - PaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 34 | 42 | 40
Investments in New Businesses | Investment processing fees - SaaS |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 21,168 | 17,557 | 15,798
Investments in New Businesses | Professional services fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | 3,299 | 1,199 | 1,811
Investments in New Businesses | Account fees and other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue | $ 11,274 | $ 9,687 | $ 8,789

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