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Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 414,762 | $ 400,820
United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 350,255 | 335,636
United Kingdom |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 37,183 | 38,816
Canada |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 11,999 | 12,387
Ireland |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 15,163 | 13,697
Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 162 | 284
Investment management fees from pooled investment products |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 116,893 | 113,771
Investment management fees from investment management agreements |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 96,440 | 93,409
Investment operations fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 106,676 | 95,243
Investment processing fees - PaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 46,153 | 43,911
Investment processing fees - SaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 32,420 | 37,257
Professional services fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,989 | 5,194
Account fees and other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 12,191 | 12,035
Private Banks |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 113,221 | 118,259
Private Banks | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 74,014 | 77,454
Private Banks | United Kingdom |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 24,359 | 25,350
Private Banks | Canada |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 10,401 | 10,660
Private Banks | Ireland |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,447 | 4,795
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 | 32,844 | 32,973
Private Banks | Investment management fees from investment management agreements |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 347 | 702
Private Banks | Investment operations fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 475 | 376
Private Banks | Investment processing fees - PaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 46,153 | 43,911
Private Banks | Investment processing fees - SaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 29,169 | 34,708
Private Banks | Professional services fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2,715 | 3,777
Private Banks | Account fees and other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,518 | 1,812
Investment Advisors |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 102,321 | 94,761
Investment Advisors | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 102,321 | 94,761
Investment Advisors | United Kingdom |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investment Advisors | Canada |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investment Advisors | Ireland |  |
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 | 70,180 | 66,623
Investment Advisors | Investment management fees from investment management agreements |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 27,420 | 23,838
Investment Advisors | Investment operations fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investment Advisors | Investment processing fees - PaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investment Advisors | Investment processing fees - SaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investment Advisors | Professional services fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investment Advisors | Account fees and other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4,721 | 4,300
Institutional Investors |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 79,203 | 80,113
Institutional Investors | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 62,089 | 62,325
Institutional Investors | United Kingdom |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 12,824 | 13,466
Institutional Investors | Canada |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,598 | 1,727
Institutional Investors | Ireland |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2,530 | 2,311
Institutional Investors | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 162 | 284
Institutional Investors | Investment management fees from pooled investment products |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 13,317 | 13,661
Institutional Investors | Investment management fees from investment management agreements |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 65,710 | 66,171
Institutional Investors | Investment operations fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Institutional Investors | Investment processing fees - PaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Institutional Investors | Investment processing fees - SaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Institutional Investors | Professional services fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Institutional Investors | Account fees and other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 176 | 281
Investment Managers |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 116,629 | 104,649
Investment Managers | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 108,443 | 98,058
Investment Managers | United Kingdom |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investment Managers | Canada |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investment Managers | Ireland |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 8,186 | 6,591
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 | 193 | 205
Investment Managers | Investment management fees from investment management agreements |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investment Managers | Investment operations fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 106,201 | 94,867
Investment Managers | Investment processing fees - PaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investment Managers | Investment processing fees - SaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,251 | 2,549
Investment Managers | Professional services fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,274 | 1,417
Investment Managers | Account fees and other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 5,710 | 5,611
Investments In New Businesses |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,388 | 3,038
Investments In New Businesses | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3,388 | 3,038
Investments In New Businesses | United Kingdom |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investments In New Businesses | Canada |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investments In New Businesses | Ireland |  |
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 | 359 | 309
Investments In New Businesses | Investment management fees from investment management agreements |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2,963 | 2,698
Investments In New Businesses | Investment operations fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investments In New Businesses | Investment processing fees - PaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investments In New Businesses | Investment processing fees - SaaS |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investments In New Businesses | Professional services fees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Investments In New Businesses | Account fees and other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 66 | $ 31

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