Income Taxes (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] | ||||
Undistributed earnings of foreign subsidiaries | $ 61,833us-gaap_UndistributedEarningsOfForeignSubsidiaries | |||
Unrecognized tax benefit, excluding interest and penalties | 14,018us-gaap_UnrecognizedTaxBenefits | 12,028us-gaap_UnrecognizedTaxBenefits | 11,553us-gaap_UnrecognizedTaxBenefits | 9,410us-gaap_UnrecognizedTaxBenefits |
Unrecognized tax benefits that would affect effective tax rate | 12,162us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | |||
Amount included in Other long-term liabilities | 10,327us-gaap_LiabilityForUncertainTaxPositionsNoncurrent | 8,607us-gaap_LiabilityForUncertainTaxPositionsNoncurrent | ||
Amount of previously unrecognized tax benefits recognized | 1,336seic_UnrecognizedTaxBenefitsReductionsResultingFromLapseofApplicableStatuteofLimitations1 | |||
Tax related interest and penalties | 1,066us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense | 754us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense | 770us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense | |
Current liabilities [Member] | ||||
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] | ||||
Amount netted against current payable account | 4,757us-gaap_LiabilityForUncertainTaxPositionsCurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentLiabilitiesMember |
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Other long-term liabilities [Member] | ||||
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] | ||||
Amount included in Other long-term liabilities | 10,327us-gaap_LiabilityForUncertainTaxPositionsNoncurrent / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentLiabilitiesMember |
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Settlement and Lapse of Statute [Member] | ||||
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] | ||||
Unrecognized tax benefits within the next 12 months | $ 1,700us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit / us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis = seic_SettlementandLapseofStatuteMember |
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- Definition
Unrecognized Tax Benefits Reductions Resulting From Lapse of Applicable Statute of Limitations1 No definition available.
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- Definition
The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The current portion of the amount recognized for uncertain tax positions as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The noncurrent portion of the amount recognized for uncertain tax positions as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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