XML 68 R58.htm IDEA: XBRL DOCUMENT
v3.22.1

Commitments and Contingencies (Details) - lawsuit |  | 3 Months Ended
--- | --- | ---
Jan. 14, 2022 | Mar. 31, 2022
Stanford Trust Company Litigation |  |
Loss Contingencies [Line Items] |  |
Number of actions filed |  | 7
Stanford Trust Company Litigation, SPTC As Defendant |  |
Loss Contingencies [Line Items] |  |
Number of actions filed |  | 4
Stanford Trust Company Litigation, Claims For Violations Of Louisiana Racketeering Act |  |
Loss Contingencies [Line Items] |  |
Number of actions filed |  | 2
Stanford Trust Company Litigation, Federal Class Actions |  |
Loss Contingencies [Line Items] |  |
Number of actions filed |  | 2
Stanford Trust Company Litigation, Ancillary Actions |  |
Loss Contingencies [Line Items] |  |
Number of dismissed actions | 2 |
Number of actions filed |  | 5
Number of lawsuits filed |  | 2

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of claims dismissed. + References No definition available. + Details
Name: | us-gaap_LossContingencyClaimsDismissedNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total number of new claims filed pertaining to a loss contingency during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 + Details
Name: | us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 + Details
Name: | us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_LitigationCaseAxis=seic_StanfordTrustCompanyLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=seic_StanfordTrustCompanyLitigationSPTCAsDefendantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=seic_StanfordTrustCompanyLitigationClaimsForViolationsOfLouisianaRacketeeringActMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=seic_StanfordTrustCompanyLitigationFederalClassActionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=seic_StanfordTrustCompanyLitigationAncillaryActionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |