$SEIC
SEI INVESTMENTS CO Stock $seic

$seic Overview Financials Valuation SEC Filings Company Website

2024 Q4 Form 10-Q Financial Statement

#000035089424000131 Filed on October 25, 2024

Income Statement

Concept	2024 Q4	2024 Q3
Revenue		$537.4M
YoY Change		12.72%
Cost Of Revenue		$78.53M
YoY Change		8.16%
Gross Profit		$181.7M
YoY Change		30.31%
Gross Profit Margin		33.82%
Selling, General & Admin		$296.3M
YoY Change		7.08%
% of Gross Profit		163.03%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization		$18.75M
YoY Change		-1.29%
% of Gross Profit		10.32%
Operating Expenses		$315.0M
YoY Change		6.54%
Operating Profit		$143.8M
YoY Change		32.6%
Interest Expense		$50.38M
YoY Change		43329.31%
% of Operating Profit		35.03%
Other Income/Expense, Net		$8.151M
YoY Change
Pretax Income		$202.4M
YoY Change		35.63%
Income Tax		$47.46M
% Of Pretax Income		23.45%
Net Earnings		$154.9M
YoY Change		33.93%
Net Earnings / Revenue		28.82%
Basic Earnings Per Share		$1.20
Diluted Earnings Per Share		$1.19
COMMON SHARES
Basic Shares Outstanding	128.9M shares	129.9M shares
Diluted Shares Outstanding		130.7M shares

Balance Sheet

Concept	2024 Q4	2024 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments		$931.4M
YoY Change		4.98%
Cash & Equivalents		$901.1M
Short-Term Investments		$30.29M
Other Short-Term Assets		$61.43M
YoY Change		7.11%
Inventory
Prepaid Expenses
Receivables		$609.8M
Other Receivables		$54.59M
Total Short-Term Assets		$1.658B
YoY Change		9.09%
LONG-TERM ASSETS
Property, Plant & Equipment		$164.9M
YoY Change		-7.09%
Goodwill		$138.1M
YoY Change		19.45%
Intangibles		$74.04M
YoY Change		59.53%
Long-Term Investments		$49.68M
YoY Change		11.27%
Other Assets		$48.33M
YoY Change		29.91%
Total Long-Term Assets		$1.027B
YoY Change		16.98%
TOTAL ASSETS
Total Short-Term Assets		$1.658B
Total Long-Term Assets		$1.027B
Total Assets		$2.684B
YoY Change		11.98%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable		$8.250M
YoY Change		-19.1%
Accrued Expenses		$258.2M
YoY Change		3.32%
Deferred Revenue		$11.33M
YoY Change		-6.36%
Short-Term Debt		$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities		$285.7M
YoY Change		1.28%
LONG-TERM LIABILITIES
Long-Term Debt		$0.00
YoY Change
Other Long-Term Liabilities		$18.90M
YoY Change		23.0%
Total Long-Term Liabilities		$18.90M
YoY Change		23.0%
TOTAL LIABILITIES
Total Short-Term Liabilities		$285.7M
Total Long-Term Liabilities		$18.90M
Total Liabilities		$330.0M
YoY Change		5.32%
SHAREHOLDERS EQUITY
Retained Earnings		$901.9M
YoY Change		18.11%
Common Stock		$1.479B
YoY Change		7.91%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity		$2.354B
YoY Change
Total Liabilities & Shareholders Equity		$2.684B
YoY Change		11.98%

Cashflow Statement

Concept	2024 Q4	2024 Q3
OPERATING ACTIVITIES
Net Income		$154.9M
YoY Change		33.93%
Depreciation, Depletion And Amortization		$18.75M
YoY Change		-1.29%
Cash From Operating Activities		$200.0M
YoY Change		22.35%
INVESTING ACTIVITIES
Capital Expenditures		$12.14M
YoY Change		-20.14%
Acquisitions
YoY Change
Other Investing Activities		-$29.58M
YoY Change		310.86%
Cash From Investing Activities		$3.897M
YoY Change		-117.4%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities		-80.70M
YoY Change		45.68%
NET CHANGE
Cash From Operating Activities		200.0M
Cash From Investing Activities		3.897M
Cash From Financing Activities		-80.70M
Net Change In Cash		123.2M
YoY Change		43.8%
FREE CASH FLOW
Cash From Operating Activities		$200.0M
Capital Expenditures		$12.14M
Free Cash Flow		$187.9M
YoY Change		26.71%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2024
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity Registrant Name EntityRegistrantName	SEI INVESTMENTS COMPANY
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	PA
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	23-1707341
	dei	Entity Address Address Line1 EntityAddressAddressLine1	1 Freedom Valley Drive
	dei	Entity Address City Or Town EntityAddressCityOrTown	Oaks
	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	19456-1100
	dei	City Area Code CityAreaCode	610
	dei	Local Phone Number LocalPhoneNumber	676-1000
	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
	dei	Trading Symbol TradingSymbol	SEIC
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2024Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	302000	usd
CY2024Q3	us-gaap	Depreciation Nonproduction DepreciationNonproduction	8341000	usd
CY2023Q3	us-gaap	Depreciation Nonproduction DepreciationNonproduction	9197000	usd
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	25097000	usd
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	26509000	usd
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	us-gaap	Costs And Expenses CostsAndExpenses	1161764000	usd
	us-gaap	Costs And Expenses CostsAndExpenses	1112095000	usd
CY2024Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	143832000	usd
CY2023Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	108472000	usd
	us-gaap	Operating Income Loss OperatingIncomeLoss	406197000	usd
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CY2024Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	427000	usd
CY2023Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	-206000	usd
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CY2023Q3	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	11125000	usd
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	us-gaap	Net Income Loss NetIncomeLoss	425420000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	10366000	usd
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	252978000	usd
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	3349000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	37224000	usd
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	us-gaap	Dividends Common Stock DividendsCommonStock	60285000	usd
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CY2024Q3	us-gaap	Other Assets Current OtherAssetsCurrent	61433000	usd
	dei	Entity Central Index Key EntityCentralIndexKey	0000350894
	dei	Document Period End Date DocumentPeriodEndDate	2024-09-30
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CY2024Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	164927000	usd
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CY2024Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	29567000	usd
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CY2024Q3	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	175722000	usd
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CY2023Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	7316000	usd
CY2024Q3	us-gaap	Other Long Term Investments OtherLongTermInvestments	49675000	usd
CY2023Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	110781000	usd
CY2024Q3	us-gaap	Goodwill Goodwill	138085000	usd
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CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	37709000	usd
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	us-gaap	Revenues Revenues	1567961000	usd
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CY2024Q3	seic	Subadvisory Distribution And Other Asset Management Costs SubadvisoryDistributionAndOtherAssetManagementCosts	47969000	usd
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	seic	Subadvisory Distribution And Other Asset Management Costs SubadvisoryDistributionAndOtherAssetManagementCosts	141279000	usd
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CY2024Q3	seic	Software Royalties And Other Information Processing Costs SoftwareRoyaltiesAndOtherInformationProcessingCosts	8936000	usd
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	seic	Software Royalties And Other Information Processing Costs SoftwareRoyaltiesAndOtherInformationProcessingCosts	25503000	usd
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	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	37224000	usd
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CY2023Q3	us-gaap	Professional Fees ProfessionalFees	54203000	usd
	us-gaap	Professional Fees ProfessionalFees	159258000	usd
CY2024Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	37556000	usd
CY2023Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	34016000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	112790000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	102301000	usd
CY2024Q3	us-gaap	Occupancy Net OccupancyNet	21622000	usd
CY2023Q3	us-gaap	Occupancy Net OccupancyNet	16999000	usd
	us-gaap	Occupancy Net OccupancyNet	58795000	usd
	us-gaap	Occupancy Net OccupancyNet	58825000	usd
CY2024Q3	us-gaap	Adjustment For Amortization AdjustmentForAmortization	10413000	usd
CY2023Q3	us-gaap	Adjustment For Amortization AdjustmentForAmortization	9797000	usd
	us-gaap	Adjustment For Amortization AdjustmentForAmortization	28851000	usd
CY2024Q3	us-gaap	Interest Expense Nonoperating InterestExpenseNonoperating	141000	usd
CY2024Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	8151000	usd
CY2023Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	0	usd
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	8151000	usd
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	0	usd
CY2024Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	36513000	usd
CY2023Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	29927000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	102375000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	91517000	usd
CY2024Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	202361000	usd
CY2023Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	149202000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	555603000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	444467000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	47461000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33541000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	130183000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	102940000	usd
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	154900000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	115661000	usd
	us-gaap	Net Income Loss NetIncomeLoss	425420000	usd
	us-gaap	Net Income Loss NetIncomeLoss	341527000	usd
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.20
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.87
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.26
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.57
CY2024Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	129418000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	132231000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	130550000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	133035000	shares
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.19
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.87
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.23
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.54
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	130671000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	133504000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	131830000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	134250000	shares
CY2024Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2023Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.46
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.43
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	154900000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	115661000	usd
	us-gaap	Net Income Loss NetIncomeLoss	425420000	usd
	us-gaap	Net Income Loss NetIncomeLoss	341527000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	12413000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-8502000	usd
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	9071000	usd
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	249000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1007000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-624000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	463000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-581000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	3373000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-2089000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1546000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1945000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	21000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-10000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	76000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-39000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	70000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-35000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	251000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-128000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	15716000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-10556000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	10366000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1568000	usd
CY2024Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	170616000	usd
CY2023Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	105105000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	435786000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	339959000	usd
CY2024Q2	us-gaap	Stockholders Equity StockholdersEquity	2247503000	usd
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	154900000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	15716000	usd
CY2024Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	85815000	usd
CY2024Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	966000	usd
CY2024Q3	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	7444000	usd
CY2024Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	13696000	usd
CY2024Q3	us-gaap	Stockholders Equity StockholdersEquity	2354410000	usd
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	2023553000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	115661000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-10556000	usd
CY2023Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	85979000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1073000	usd
CY2023Q3	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	32145000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	7979000	usd
CY2023Q3	us-gaap	Stockholders Equity Other StockholdersEquityOther	-5000	usd
	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	59486000	usd
	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	62343000	usd
	us-gaap	Stockholders Equity Other StockholdersEquityOther	-5000	usd
CY2023Q3	us-gaap	Stockholders Equity StockholdersEquity	2083881000	usd
	us-gaap	Net Income Loss NetIncomeLoss	425420000	usd
	us-gaap	Net Income Loss NetIncomeLoss	341527000	usd
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1654000	usd
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	4455000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	427074000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	345982000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	27203000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	23114000	usd
	us-gaap	Payments For Software PaymentsForSoftware	18414000	usd
	us-gaap	Payments For Software PaymentsForSoftware	26584000	usd
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	134665000	usd
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	83968000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	113801000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	89352000	usd
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	7546000	usd
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	893000	usd
	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	9946000	usd
	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	usd
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	8196000	usd
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4816000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-57185000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-48237000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	62835000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	120338000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	114833000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-310392000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-294886000	usd
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6941000	usd
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1474000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	66438000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1385000	usd
CY2024Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	901436000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	854744000	usd
	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	18414000	usd
	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	26584000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	115661000	usd
	us-gaap	Net Income Loss NetIncomeLoss	425420000	usd
	us-gaap	Net Income Loss NetIncomeLoss	341527000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	129418000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	132231000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	130550000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	133035000	shares
CY2023Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1273000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1280000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1215000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	133504000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	131830000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	134250000	shares
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.87
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.26
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.57
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.87
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.23
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.54
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	10747000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11049000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	61.05
	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	61.29
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-top:5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Reclassifications</span></div><div style="margin-top:3pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain prior year amounts have been reclassified to conform to current year presentation.</span></div>
	us-gaap	Net Income Loss NetIncomeLoss	425420000	usd
	us-gaap	Net Income Loss NetIncomeLoss	341527000	usd
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	25097000	usd
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	26509000	usd
	us-gaap	Adjustment For Amortization AdjustmentForAmortization	31284000	usd
	us-gaap	Adjustment For Amortization AdjustmentForAmortization	28851000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	102375000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	91517000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	112476000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	100252000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	37224000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	23458000	usd
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1170000	usd
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	283000	usd
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	21051000	usd
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	20971000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	3349000	usd
	us-gaap	Gain Loss On Investments GainLossOnInvestments	1053000	usd
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	8151000	usd
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	usd
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	3205000	usd
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	3105000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4005000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1099000	usd
	seic	Capitalized Contract Costs Net Of Amortization CapitalizedContractCostsNetOfAmortization	2306000	usd
	seic	Capitalized Contract Costs Net Of Amortization CapitalizedContractCostsNetOfAmortization	590000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	2900000	usd
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2122000	usd
	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-1301000	usd
	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-6327000	usd
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	109522000	usd
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	62053000	usd
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-606000	usd
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	8654000	usd
	us-gaap	Increase Decrease Due From Affiliates IncreaseDecreaseDueFromAffiliates	-51005000	usd
	us-gaap	Increase Decrease Due From Affiliates IncreaseDecreaseDueFromAffiliates	-51293000	usd
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2364000	usd
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-3085000	usd
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-1655000	usd
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-48128000	usd
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-4036000	usd
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-2793000	usd
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1654000	usd
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	4455000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	427074000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	345982000	usd
CY2024Q3	us-gaap	Equity Method Investments EquityMethodInvestments	49675000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	112476000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	100252000	usd
CY2024Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	36513000	usd
CY2023Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	29927000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	102375000	usd
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	91517000	usd
CY2024Q3	us-gaap	Billed Contract Receivables BilledContractReceivables	174091000	usd
CY2023Q4	us-gaap	Billed Contract Receivables BilledContractReceivables	115356000	usd
CY2024Q3	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	418561000	usd
CY2023Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	372291000	usd
CY2024Q3	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	18975000	usd
CY2023Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	14450000	usd
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CY2023Q4	seic	Receivables Gross Current ReceivablesGrossCurrent	502097000	usd
CY2024Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1833000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	663000	usd
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CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	474034000	usd
CY2024Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	164927000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	171364000	usd
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	25097000	usd
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	26509000	usd
CY2024Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	42527000	usd
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	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	usd
CY2024Q3	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	103977000	usd
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CY2024Q3	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	10368000	usd
CY2023Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	9797000	usd
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CY2024Q3	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	37753000	usd
CY2023Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	32285000	usd
CY2024Q3	seic	Accrued Sub Advisory Distribution And Other Asset Management Fees Current AccruedSubAdvisoryDistributionAndOtherAssetManagementFeesCurrent	51812000	usd
CY2023Q4	seic	Accrued Sub Advisory Distribution And Other Asset Management Fees Current AccruedSubAdvisoryDistributionAndOtherAssetManagementFeesCurrent	49405000	usd
CY2024Q3	us-gaap	Dividends Payable Current DividendsPayableCurrent	1042000	usd
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CY2023Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	4965000	usd
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CY2023Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	32836000	usd
CY2024Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	258167000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	318945000	usd
CY2024Q3	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	30289000	usd
CY2024Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	214421000	usd
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CY2023Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	194063000	usd
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CY2023Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	565588000	usd
CY2024Q3	seic	Debt Securities Available For Sale And Equity Securities Fvni Cost DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNICost	180339000	usd
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CY2024Q3	seic	Debt Securities Available For Sale And Equity Securities Fvni Accumulated Gross Unrealized Loss Before Tax DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNIAccumulatedGrossUnrealizedLossBeforeTax	7247000	usd
CY2024Q3	seic	Debt Securities Available For Sale And Equity Securities Fvni DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNI	175722000	usd
CY2023Q4	seic	Debt Securities Available For Sale And Equity Securities Fvni Cost DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNICost	163409000	usd
CY2023Q4	seic	Debt Securities Available For Sale And Equity Securities Fvni Accumulated Gross Unrealized Gain Before Tax DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNIAccumulatedGrossUnrealizedGainBeforeTax	952000	usd
CY2023Q4	seic	Debt Securities Available For Sale And Equity Securities Fvni Accumulated Gross Unrealized Loss Before Tax DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNIAccumulatedGrossUnrealizedLossBeforeTax	8948000	usd
CY2023Q4	seic	Debt Securities Available For Sale And Equity Securities Fvni DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNI	155413000	usd
CY2024Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-5580000	usd
CY2024Q3	seic	Accumulated Other Comprehensive Income Loss Debt Securities Available For Sale Securities Adjustment Tax AccumulatedOtherComprehensiveIncomeLossDebtSecuritiesAvailableForSaleSecuritiesAdjustmentTax	-1667000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-6875000	usd
CY2023Q4	seic	Accumulated Other Comprehensive Income Loss Debt Securities Available For Sale Securities Adjustment Tax AccumulatedOtherComprehensiveIncomeLossDebtSecuritiesAvailableForSaleSecuritiesAdjustmentTax	-2054000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	0	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	0	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	4648000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	4269000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	17732000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	16478000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	120338000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	114724000	usd
CY2024Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	142718000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	135471000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	0	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	0	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	5679000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	5035000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	31162000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	28084000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	90840000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	85633000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	127681000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	118752000	usd
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CY2024Q3	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	30289000	usd
CY2023Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	31334000	usd
CY2024Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	13696000	usd
CY2023Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7979000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	37224000	usd
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	23458000	usd
CY2024Q3	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2616000	usd
CY2023Q3	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1438000	usd
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	7201000	usd
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4278000	usd
CY2024Q3	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	11080000	usd
CY2023Q3	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	6541000	usd
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	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	19180000	usd
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	3098000	usd
CY2024Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	85239000	usd
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	24053000	usd
CY2024Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	71076000	usd
CY2024Q3	us-gaap	Share Price SharePrice	69.19
CY2024Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	55.98
CY2024Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	15343000	shares
CY2024Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	5298000	shares
CY2024Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.46
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	us-gaap	Dividends Common Stock DividendsCommonStock	57177000	usd
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CY2024Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	355658000	usd
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CY2024Q3	us-gaap	Gross Profit GrossProfit	181738000	usd
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CY2024Q3	us-gaap	Adjustment For Amortization AdjustmentForAmortization	10413000	usd
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CY2024Q3	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	17766000	usd
CY2023Q4	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	15532000	usd
CY2024Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	17604000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	14878000	usd
CY2024Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	2232000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1385000	usd
CY2024Q3	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	17766000	usd
CY2023Q4	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	15532000	usd
CY2024Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	2232000	usd
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CY2024Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	19998000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16917000	usd
CY2024Q3	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	3713000	usd
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CY2024Q3	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	16285000	usd
CY2023Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	13080000	usd
CY2024Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	19998000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16917000	usd
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CY2023Q4	us-gaap	Goodwill Goodwill	137333000	usd
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CY2024Q3	us-gaap	Goodwill Goodwill	138085000	usd
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CY2024Q3	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	8151000	usd
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Files In Submission

Name	View Source	Status
FilingSummary.xml	Edgar Link	unprocessable
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0000350894-24-000131-index.html	Edgar Link	pending
0000350894-24-000131.txt	Edgar Link	pending
0000350894-24-000131-xbrl.zip	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
image.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
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$SEIC
SEI INVESTMENTS CO Stock $seic

2024 Q4 Form 10-Q Financial Statement

#000035089424000131 Filed on October 25, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SEIC SEI INVESTMENTS CO Stock $seic

2024 Q4 Form 10-Q Financial Statement

#000035089424000131 Filed on October 25, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SEIC
SEI INVESTMENTS CO Stock $seic