Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues		$ 1,991,037	$ 1,918,309	$ 1,684,058
United States
Disaggregation of Revenue [Line Items]
Revenues		1,623,022	1,629,527	1,427,152
United Kingdom
Disaggregation of Revenue [Line Items]
Revenues		242,071	165,788	149,188
Canada
Disaggregation of Revenue [Line Items]
Revenues		48,419	52,721	47,372
Ireland
Disaggregation of Revenue [Line Items]
Revenues		60,365	69,770	59,792
Luxembourg
Disaggregation of Revenue [Line Items]
Revenues		16,898
Other
Disaggregation of Revenue [Line Items]
Revenues		262	503	554
Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues		445,224	495,378	454,841
Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues		432,322	458,087	392,171
Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues		579,813	539,958	449,321
Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues		228,556	215,473	184,711
Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues		139,102	128,963	126,751
Professional services fees
Disaggregation of Revenue [Line Items]
Revenues		104,842	25,562	27,347
Account fees and other
Disaggregation of Revenue [Line Items]
Revenues		61,178	54,888	48,916
Private Banks
Disaggregation of Revenue [Line Items]
Revenues		575,625	493,570	455,393
Private Banks \| United States
Disaggregation of Revenue [Line Items]
Revenues		317,399	315,040	298,708
Private Banks \| United Kingdom
Disaggregation of Revenue [Line Items]
Revenues		199,294	111,900	97,896
Private Banks \| Canada
Disaggregation of Revenue [Line Items]
Revenues		43,108	48,325	41,762
Private Banks \| Ireland
Disaggregation of Revenue [Line Items]
Revenues		15,824	18,305	17,027
Private Banks \| Luxembourg
Disaggregation of Revenue [Line Items]
Revenues		0
Private Banks \| Other
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Private Banks \| Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues		125,430	134,617	127,883
Private Banks \| Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues		2,187	2,271	1,470
Private Banks \| Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues		1,410	1,512	1,804
Private Banks \| Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues		228,556	215,473	184,711
Private Banks \| Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues		112,096	113,964	113,012
Private Banks \| Professional services fees
Disaggregation of Revenue [Line Items]
Revenues		102,169	22,054	21,594
Private Banks \| Account fees and other
Disaggregation of Revenue [Line Items]
Revenues		3,777	3,679	4,919
Private Banks \| Professional services fees, one-time early termination fees
Disaggregation of Revenue [Line Items]
Revenues	$ 88,000
Investment Advisors
Disaggregation of Revenue [Line Items]
Revenues		447,766	482,949	407,564
Investment Advisors \| United States
Disaggregation of Revenue [Line Items]
Revenues		447,766	482,949	407,564
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
Investment Advisors \| Other
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Investment Advisors \| Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues		263,266	301,581	271,627
Investment Advisors \| Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues		162,762	158,181	115,887
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		0	0	0
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		21,738	23,187	20,050
Institutional Investors
Disaggregation of Revenue [Line Items]
Revenues		323,353	343,805	317,627
Institutional Investors \| United States
Disaggregation of Revenue [Line Items]
Revenues		267,928	274,867	250,321
Institutional Investors \| United Kingdom
Disaggregation of Revenue [Line Items]
Revenues		42,777	53,888	51,292
Institutional Investors \| Canada
Disaggregation of Revenue [Line Items]
Revenues		5,311	4,396	5,610
Institutional Investors \| Ireland
Disaggregation of Revenue [Line Items]
Revenues		7,075	10,151	9,850
Institutional Investors \| Luxembourg
Disaggregation of Revenue [Line Items]
Revenues		0
Institutional Investors \| Other
Disaggregation of Revenue [Line Items]
Revenues		262	503	554
Institutional Investors \| Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues		54,656	57,716	53,283
Institutional Investors \| Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues		251,256	282,797	262,709
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		0	0	0
Institutional Investors \| Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues		11,425	1,207	0
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		6,016	2,085	1,635
Investment Managers
Disaggregation of Revenue [Line Items]
Revenues		624,918	581,157	489,462
Investment Managers \| United States
Disaggregation of Revenue [Line Items]
Revenues		570,554	539,843	456,547
Investment Managers \| United Kingdom
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Investment Managers \| Canada
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Investment Managers \| Ireland
Disaggregation of Revenue [Line Items]
Revenues		37,466	41,314	32,915
Investment Managers \| Luxembourg
Disaggregation of Revenue [Line Items]
Revenues		16,898
Investment Managers \| Other
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Investment Managers \| Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues		396	134	637
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		578,403	538,446	447,517
Investment Managers \| Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Investment Managers \| Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues		15,581	13,792	13,739
Investment Managers \| Professional services fees
Disaggregation of Revenue [Line Items]
Revenues		2,673	3,508	5,753
Investment Managers \| Account fees and other
Disaggregation of Revenue [Line Items]
Revenues		27,865	25,277	21,816
Investments in New Businesses
Disaggregation of Revenue [Line Items]
Revenues		19,375	16,828	14,012
Investments in New Businesses \| United States
Disaggregation of Revenue [Line Items]
Revenues		19,375	16,828	14,012
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
Investments in New Businesses \| Other
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Investments in New Businesses \| Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues		1,476	1,330	1,411
Investments in New Businesses \| Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues		16,117	14,838	12,105
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		0	0	0
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		$ 1,782	$ 660	$ 496