XML 73 R63.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Voluntary Separation Program (Details) $ in Thousands | 3 Months Ended
--- | ---
Sep. 30, 2022 USD ($)
Voluntary Separation Program [Abstract] |
Personnel costs | $ 56,996

X
- Definition Voluntary Separation Program + References No definition available. + Details
Name: | seic_VoluntarySeparationProgramAbstract
Namespace Prefix: | seic_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Voluntary Separation Program, Personnel Costs + References No definition available. + Details
Name: | seic_VoluntarySeparationProgramPersonnelCosts
Namespace Prefix: | seic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration