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Revenues from Contracts with Customers (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | $ 405,598,000 |
Deferred contract costs | 19,875,000 | $ 0
Capitalized contract cost impairment | 0 |
United States [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 335,748,000 |
United Kingdom [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 42,312,000 |
Canada [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 14,272,000 |
Ireland [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 12,428,000 |
Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 838,000 |
Investment Management Fees From Investment Products [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 123,691,000 |
Investment Management Fees From Investment Management Agreements [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 93,955,000 |
Investment Operations Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 87,837,000 |
Investment Processing Fees, PaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 45,068,000 |
Investment Processing Fees, SaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 36,967,000 |
Professional Services Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 7,306,000 |
Account Fees And Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 10,774,000 |
Private Banks [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 122,164,000 |
Private Banks [Member] | United States [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 78,133,000 |
Private Banks [Member] | United Kingdom [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 27,525,000 |
Private Banks [Member] | Canada [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 11,601,000 |
Private Banks [Member] | Ireland [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 4,905,000 |
Private Banks [Member] | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Private Banks [Member] | Investment Management Fees From Investment Products [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 35,190,000 |
Private Banks [Member] | Investment Management Fees From Investment Management Agreements [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 198,000 |
Private Banks [Member] | Investment Operations Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 382,000 |
Private Banks [Member] | Investment Processing Fees, PaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 44,585,000 |
Private Banks [Member] | Investment Processing Fees, SaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 34,602,000 |
Private Banks [Member] | Professional Services Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 5,419,000 |
Private Banks [Member] | Account Fees And Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 1,788,000 |
Investment Advisors [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 99,192,000 |
Investment Advisors [Member] | United States [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 99,192,000 |
Investment Advisors [Member] | United Kingdom [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Advisors [Member] | Canada [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Advisors [Member] | Ireland [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Advisors [Member] | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Advisors [Member] | Investment Management Fees From Investment Products [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 72,418,000 |
Investment Advisors [Member] | Investment Management Fees From Investment Management Agreements [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 22,764,000 |
Investment Advisors [Member] | Investment Operations Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Advisors [Member] | Investment Processing Fees, PaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Advisors [Member] | Investment Processing Fees, SaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Advisors [Member] | Professional Services Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Advisors [Member] | Account Fees And Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 4,010,000 |
Institutional Investors [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 85,491,000 |
Institutional Investors [Member] | United States [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 64,768,000 |
Institutional Investors [Member] | United Kingdom [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 14,787,000 |
Institutional Investors [Member] | Canada [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 2,671,000 |
Institutional Investors [Member] | Ireland [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 2,427,000 |
Institutional Investors [Member] | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 838,000 |
Institutional Investors [Member] | Investment Management Fees From Investment Products [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 15,858,000 |
Institutional Investors [Member] | Investment Management Fees From Investment Management Agreements [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 69,276,000 |
Institutional Investors [Member] | Investment Operations Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Institutional Investors [Member] | Investment Processing Fees, PaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Institutional Investors [Member] | Investment Processing Fees, SaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Institutional Investors [Member] | Professional Services Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Institutional Investors [Member] | Account Fees And Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 357,000 |
Investment Managers [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 96,855,000 |
Investment Managers [Member] | United States [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 91,759,000 |
Investment Managers [Member] | United Kingdom [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Managers [Member] | Canada [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Managers [Member] | Ireland [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 5,096,000 |
Investment Managers [Member] | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Managers [Member] | Investment Management Fees From Investment Products [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investment Managers [Member] | Investment Management Fees From Investment Management Agreements [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 83,000 |
Investment Managers [Member] | Investment Operations Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 87,455,000 |
Investment Managers [Member] | Investment Processing Fees, PaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 483,000 |
Investment Managers [Member] | Investment Processing Fees, SaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 2,365,000 |
Investment Managers [Member] | Professional Services Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 1,887,000 |
Investment Managers [Member] | Account Fees And Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 4,582,000 |
Investments In New Businesses [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 1,896,000 |
Investments In New Businesses [Member] | United States [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 1,896,000 |
Investments In New Businesses [Member] | United Kingdom [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investments In New Businesses [Member] | Canada [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investments In New Businesses [Member] | Ireland [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investments In New Businesses [Member] | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investments In New Businesses [Member] | Investment Management Fees From Investment Products [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 225,000 |
Investments In New Businesses [Member] | Investment Management Fees From Investment Management Agreements [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 1,634,000 |
Investments In New Businesses [Member] | Investment Operations Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investments In New Businesses [Member] | Investment Processing Fees, PaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investments In New Businesses [Member] | Investment Processing Fees, SaaS [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investments In New Businesses [Member] | Professional Services Fees [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 0 |
Investments In New Businesses [Member] | Account Fees And Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | $ 37,000 |

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 32 -Paragraph 2A -URI http://asc.fasb.org/extlink&oid=82859839&loc=SL82860478-203043 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130539-203045 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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