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Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 416,254 | $ 408,682 | $ 1,226,660 | $ 1,219,110
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 351,609 | 338,413 | 1,030,764 | 1,009,427
United Kingdom |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 37,321 | 42,464 | 114,972 | 127,675
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 12,728 | 13,625 | 37,705 | 41,547
Ireland |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 14,434 | 13,855 | 42,521 | 38,967
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 162 | 325 | 698 | 1,494
Investment management fees from pooled investment products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 120,310 | 123,647 | 351,927 | 370,806
Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 96,026 | 95,760 | 284,955 | 283,555
Investment operations fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 102,977 | 92,566 | 298,514 | 269,089
Investment processing fees - PaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 43,462 | 45,460 | 130,529 | 135,085
Investment processing fees - SaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 36,807 | 35,342 | 111,433 | 110,132
Professional services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,931 | 5,200 | 14,259 | 18,682
Account fees and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 11,741 | 10,707 | 35,043 | 31,761
Private Banks |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 117,250 | 118,449 | 351,601 | 361,739
Private Banks | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 76,864 | 73,188 | 229,207 | 226,990
Private Banks | United Kingdom |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 24,604 | 28,647 | 75,649 | 85,177
Private Banks | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 10,985 | 11,730 | 32,527 | 34,847
Private Banks | Ireland |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 4,797 | 4,884 | 14,218 | 14,725
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 | 34,074 | 34,897 | 100,498 | 105,251
Private Banks | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 314 | 197 | 1,299 | 609
Private Banks | Investment operations fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 434 | 381 | 1,172 | 1,138
Private Banks | Investment processing fees - PaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 43,462 | 44,836 | 130,529 | 133,336
Private Banks | Investment processing fees - SaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 34,018 | 32,925 | 103,502 | 102,980
Private Banks | Professional services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 3,533 | 3,408 | 9,896 | 13,022
Private Banks | Account fees and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,415 | 1,805 | 4,705 | 5,403
Investment Advisors |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 103,033 | 102,550 | 297,916 | 301,632
Investment Advisors | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 103,033 | 102,550 | 297,916 | 301,632
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 | 72,150 | 73,663 | 208,860 | 218,562
Investment Advisors | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 26,240 | 24,525 | 75,526 | 70,678
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 | 4,643 | 4,362 | 13,530 | 12,392
Institutional Investors |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 80,337 | 83,466 | 241,559 | 252,391
Institutional Investors | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 63,405 | 64,601 | 189,383 | 193,417
Institutional Investors | United Kingdom |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 12,717 | 13,817 | 39,323 | 42,498
Institutional Investors | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,743 | 1,895 | 5,178 | 6,700
Institutional Investors | Ireland |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 2,310 | 2,828 | 6,977 | 8,282
Institutional Investors | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 162 | 325 | 698 | 1,494
Institutional Investors | Investment management fees from pooled investment products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 13,602 | 14,614 | 41,062 | 45,819
Institutional Investors | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 66,373 | 68,318 | 199,620 | 205,202
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 | 362 | 534 | 877 | 1,370
Investment Managers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 112,186 | 101,275 | 326,037 | 295,696
Investment Managers | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 104,859 | 95,132 | 304,711 | 279,736
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 | 7,327 | 6,143 | 21,326 | 15,960
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 | 161 | 206 | 550 | 445
Investment Managers | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 79 | 0 | 242
Investment Managers | Investment operations fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 102,543 | 92,185 | 297,342 | 267,951
Investment Managers | Investment processing fees - PaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 0 | 624 | 0 | 1,749
Investment Managers | Investment processing fees - SaaS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 2,789 | 2,417 | 7,931 | 7,152
Investment Managers | Professional services fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,398 | 1,792 | 4,363 | 5,660
Investment Managers | Account fees and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 5,295 | 3,972 | 15,851 | 12,497
Investments In New Businesses |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 3,448 | 2,942 | 9,547 | 7,652
Investments In New Businesses | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 3,448 | 2,942 | 9,547 | 7,652
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 | 323 | 267 | 957 | 729
Investments In New Businesses | Investment management fees from investment management agreements |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 3,099 | 2,641 | 8,510 | 6,824
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 | $ 26 | $ 34 | $ 80 | $ 99

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