$SEIC
SEI INVESTMENTS CO Stock $seic

$seic Overview Financials Valuation SEC Filings Company Website

2020 Q2 Form 10-Q Financial Statement

#000035089420000026 Filed on April 28, 2020

Income Statement

Concept	2020 Q2	2020 Q1	2019 Q1
Revenue	$400.6M	$414.8M	$400.8M
YoY Change	-2.18%	3.48%	-1.18%
Cost Of Revenue	$65.50M	$69.60M	$68.10M
YoY Change	-3.82%	2.2%	-4.76%
Gross Profit	$117.7M	$128.2M	$123.6M
YoY Change	-13.9%	3.73%	-5.84%
Gross Profit Margin	29.38%	30.91%	30.84%
Selling, General & Admin	$214.0M	$214.4M	$209.1M
YoY Change	6.41%	2.53%	5.18%
% of Gross Profit	181.81%	167.22%	169.18%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$7.640M	$7.473M	$7.331M
YoY Change	2.94%	1.94%	2.93%
% of Gross Profit	6.49%	5.83%	5.93%
Operating Expenses	$234.8M	$234.9M	$229.2M
YoY Change	6.05%	2.49%	5.23%
Operating Profit	$100.3M	$110.2M	$103.6M
YoY Change	-16.5%	6.44%	-10.97%
Interest Expense	$151.0K	$152.0K	$157.0K
YoY Change	-9.04%	-3.18%	-38.91%
% of Operating Profit	0.15%	0.14%	0.15%
Other Income/Expense, Net
YoY Change
Pretax Income	$131.7M	$139.2M	$146.3M
YoY Change	-18.87%	-4.83%	-7.87%
Income Tax	$30.64M	$29.96M	$32.28M
% Of Pretax Income	23.27%	21.52%	22.07%
Net Earnings	$101.1M	$109.2M	$114.0M
YoY Change	-20.13%	-4.16%	-18.49%
Net Earnings / Revenue	25.23%	26.34%	28.44%
Basic Earnings Per Share	$0.69	$0.73	$0.74
Diluted Earnings Per Share	$0.68	$0.72	$0.73
COMMON SHARES
Basic Shares Outstanding	147.9M shares	150.0M shares	153.7M shares
Diluted Shares Outstanding	149.6M shares	152.4M shares	156.5M shares

Balance Sheet

Concept	2020 Q2	2020 Q1	2019 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$793.3M	$778.3M	$702.8M
YoY Change	11.01%	10.74%	-8.72%
Cash & Equivalents	$758.3M	$746.9M	$669.3M
Short-Term Investments	$35.00M	$31.40M	$33.40M
Other Short-Term Assets	$35.01M	$42.02M	$35.05M
YoY Change	9.68%	19.88%	0.94%
Inventory
Prepaid Expenses
Receivables	$351.6M	$358.1M	$373.0M
Other Receivables	$11.00M	$16.00M	$13.30M
Total Short-Term Assets	$1.233B	$1.233B	$1.128B
YoY Change	8.38%	9.36%	-3.73%
LONG-TERM ASSETS
Property, Plant & Equipment	$182.3M	$173.3M	$146.8M
YoY Change	21.48%	18.06%	1.01%
Goodwill	$64.49M	$64.49M	$64.49M
YoY Change	0.0%	0.0%	21.7%
Intangibles	$26.15M	$27.07M	$30.75M
YoY Change	-12.35%	-11.98%	10.6%
Long-Term Investments	$151.2M	$159.6M	$171.6M
YoY Change	-6.84%	-6.99%	19.92%
Other Assets	$37.72M	$33.30M	$32.88M
YoY Change	11.73%	1.28%	79.35%
Total Long-Term Assets	$820.7M	$824.9M	$825.5M
YoY Change	0.67%	-0.08%	14.27%
TOTAL ASSETS
Total Short-Term Assets	$1.233B	$1.233B	$1.128B
Total Long-Term Assets	$820.7M	$824.9M	$825.5M
Total Assets	$2.054B	$2.058B	$1.953B
YoY Change	5.16%	5.37%	3.14%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$10.78M	$13.09M	$5.242M
YoY Change	96.21%	149.64%	-38.06%
Accrued Expenses	$210.7M	$179.8M	$173.9M
YoY Change	18.06%	3.4%	3.11%
Deferred Revenue	$6.349M	$5.978M	$4.979M
YoY Change	34.94%	20.06%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$236.1M	$207.6M	$192.5M
YoY Change	19.9%	7.8%	5.74%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change			-100.0%
Other Long-Term Liabilities	$22.60M	$24.41M	$24.49M
YoY Change	-10.81%	-0.33%	89.0%
Total Long-Term Liabilities	$22.60M	$24.41M	$24.49M
YoY Change	-10.81%	-0.33%	89.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$236.1M	$207.6M	$192.5M
Total Long-Term Liabilities	$22.60M	$24.41M	$24.49M
Total Liabilities	$345.0M	$323.8M	$316.6M
YoY Change	8.38%	2.27%	13.04%
SHAREHOLDERS EQUITY
Retained Earnings	$566.9M	$597.5M	$552.4M
YoY Change	4.66%	8.17%	1.37%
Common Stock	$1.176B	$1.172B	$1.113B
YoY Change	4.65%	5.32%	2.39%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.709B	$1.734B	$1.637B
YoY Change
Total Liabilities & Shareholders Equity	$2.054B	$2.058B	$1.953B
YoY Change	5.16%	5.37%	3.14%

Cashflow Statement

Concept	2020 Q2	2020 Q1	2019 Q1
OPERATING ACTIVITIES
Net Income	$101.1M	$109.2M	$114.0M
YoY Change	-20.13%	-4.16%	-18.49%
Depreciation, Depletion And Amortization	$7.640M	$7.473M	$7.331M
YoY Change	2.94%	1.94%	2.93%
Cash From Operating Activities	$165.1M	$98.97M	$59.90M
YoY Change	4.69%	65.23%	-42.5%
INVESTING ACTIVITIES
Capital Expenditures	-$19.90M	$20.67M	$7.317M
YoY Change	-1.0%	182.55%	30.4%
Acquisitions
YoY Change
Other Investing Activities	-$200.0K	-$1.500M	$0.00
YoY Change	-103.57%		-100.0%
Cash From Investing Activities	-$20.00M	-$17.35M	-$15.73M
YoY Change	36.99%	10.34%	2.28%
FINANCING ACTIVITIES
Cash Dividend Paid		$52.45M	$50.76M
YoY Change		3.33%	7.59%
Common Stock Issuance & Retirement, Net		$112.0M	$81.88M
YoY Change		36.74%	171.99%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-134.3M	-$165.1M	-$132.6M
YoY Change	5.5%	24.43%	51.97%
NET CHANGE
Cash From Operating Activities	165.1M	$98.97M	$59.90M
Cash From Investing Activities	-20.00M	-$17.35M	-$15.73M
Cash From Financing Activities	-134.3M	-$165.1M	-$132.6M
Net Change In Cash	10.80M	-$94.58M	-$85.20M
YoY Change	-31.65%	11.01%	-2201.6%
FREE CASH FLOW
Cash From Operating Activities	$165.1M	$98.97M	$59.90M
Capital Expenditures	-$19.90M	$20.67M	$7.317M
Free Cash Flow	$185.0M	$78.30M	$52.58M
YoY Change	4.05%	48.91%	-46.65%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2020Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020Q1	dei	Entity Central Index Key EntityCentralIndexKey	0000350894
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CY2019Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-24000	USD
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CY2020Q1	dei	Document Type DocumentType	10-Q
CY2020Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2020Q1	dei	Document Period End Date DocumentPeriodEndDate	2020-03-31
CY2020Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2020Q1	dei	Entity File Number EntityFileNumber	0-10200
CY2020Q1	dei	Entity Registrant Name EntityRegistrantName	SEI INVESTMENTS COMPANY
CY2020Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	PA
CY2020Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	23-1707341
CY2020Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	1 Freedom Valley Drive
CY2020Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	Oaks
CY2020Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
CY2020Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	19456
CY2020Q1	dei	City Area Code CityAreaCode	610
CY2020Q1	dei	Local Phone Number LocalPhoneNumber	676-1000
CY2020Q1	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2020Q1	dei	Trading Symbol TradingSymbol	SEIC
CY2020Q1	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2020Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2019Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	3397000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1131000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	797000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-100000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1231000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-86000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	883000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-11844000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4280000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	97398000	USD
CY2019Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	118261000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1738778000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	109242000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-11844000	USD
CY2020Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	127432000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1106000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	17487000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6929000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	1734266000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1593147000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	113981000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4280000	USD
CY2019Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	88789000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1322000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	7571000	USD
CY2019Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5038000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	1636550000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	109242000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	113981000	USD
CY2020Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-10270000	USD
CY2019Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-54082000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	98972000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	59899000	USD
CY2020Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	20674000	USD
CY2019Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7317000	USD
CY2020Q1	us-gaap	Payments For Software PaymentsForSoftware	6458000	USD
CY2019Q1	us-gaap	Payments For Software PaymentsForSoftware	9937000	USD
CY2020Q1	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	29407000	USD
CY2019Q1	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	43672000	USD
CY2020Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	37623000	USD
CY2019Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	45200000	USD
CY2020Q1	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	64000	USD
CY2019Q1	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	USD
CY2020Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1500000	USD
CY2019Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-17352000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-15726000	USD
CY2020Q1	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	633000	USD
CY2019Q1	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	130558000	USD
CY2019Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	90777000	USD
CY2020Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	18593000	USD
CY2019Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	8893000	USD
CY2020Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	52452000	USD
CY2019Q1	us-gaap	Payments Of Dividends PaymentsOfDividends	50760000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-165050000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-132644000	USD
CY2020Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-11146000	USD
CY2019Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3272000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-94576000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-85199000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	844547000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	758039000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	749971000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	672840000	USD
CY2020Q1	seic	Operating Lease Right Of Use Assets And Lease Liabilities Recorded OperatingLeaseRightOfUseAssetsAndLeaseLiabilitiesRecorded	0	USD
CY2019Q1	seic	Operating Lease Right Of Use Assets And Lease Liabilities Recorded OperatingLeaseRightOfUseAssetsAndLeaseLiabilitiesRecorded	44169000	USD
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.72
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.73
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.74
CY2020Q1	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	6458000	USD
CY2019Q1	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	9937000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	109242000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	113981000	USD
CY2020Q1	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	149468000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	153310000	shares
CY2020Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2900000	shares
CY2019Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3231000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	152368000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	156541000	shares
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.73
CY2020Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	7408000	shares
CY2019Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6323000	shares
CY2020Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	58.76
CY2019Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	54.81
CY2020Q1	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;padding-top:6px;font-size:10pt;"><span style="font-family:Arial;font-size:10pt;text-decoration:underline;">Reclassifications</span></div>Certain prior year amounts have been reclassified to conform to current year presentation.
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	109242000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	113981000	USD
CY2020Q1	us-gaap	Depreciation Nonproduction DepreciationNonproduction	7473000	USD
CY2019Q1	us-gaap	Depreciation Nonproduction DepreciationNonproduction	7331000	USD
CY2020Q1	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	13077000	USD
CY2019Q1	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	12679000	USD
CY2020Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	29907000	USD
CY2019Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	37317000	USD
CY2020Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	52036000	USD
CY2019Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	33237000	USD
CY2020Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6929000	USD
CY2019Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5038000	USD
CY2020Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	80000	USD
CY2019Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-85000	USD
CY2020Q1	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	1879000	USD
CY2019Q1	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	984000	USD
CY2020Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	-3989000	USD
CY2019Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	1279000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	360000	USD
CY2019Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	277000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4658000	USD
CY2019Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1334000	USD
CY2020Q1	seic	Capitalized Contract Costs Net Of Amortization CapitalizedContractCostsNetOfAmortization	1769000	USD
CY2019Q1	seic	Capitalized Contract Costs Net Of Amortization CapitalizedContractCostsNetOfAmortization	138000	USD
CY2020Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	1612000	USD
CY2019Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	63000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-2553000	USD
CY2019Q1	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	2693000	USD
CY2020Q1	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	17852000	USD
CY2019Q1	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	18304000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	9728000	USD
CY2019Q1	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-574000	USD
CY2020Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	8663000	USD
CY2019Q1	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-5678000	USD
CY2020Q1	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-36818000	USD
CY2019Q1	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-47836000	USD
CY2020Q1	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-1207000	USD
CY2019Q1	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-175000	USD
CY2020Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-10270000	USD
CY2019Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-54082000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	98972000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	59899000	USD
CY2020Q1	us-gaap	Billed Contract Receivables BilledContractReceivables	87126000	USD
CY2019Q4	us-gaap	Billed Contract Receivables BilledContractReceivables	86043000	USD
CY2020Q1	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	256280000	USD
CY2019Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	240239000	USD
CY2020Q1	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	16005000	USD
CY2019Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	15277000	USD
CY2020Q1	seic	Receivables Gross Current ReceivablesGrossCurrent	359411000	USD
CY2019Q4	seic	Receivables Gross Current ReceivablesGrossCurrent	341559000	USD
CY2020Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1281000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1201000	USD
CY2020Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	358130000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	340358000	USD
CY2020Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	533403000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	514312000	USD
CY2020Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	360148000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	353453000	USD
CY2020Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	173255000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	160859000	USD
CY2020Q1	us-gaap	Depreciation Nonproduction DepreciationNonproduction	7473000	USD
CY2019Q1	us-gaap	Depreciation Nonproduction DepreciationNonproduction	7331000	USD
CY2020Q1	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	32760000	USD
CY2019Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	30991000	USD
CY2020Q1	seic	Capitalized Contract Cost Amount Capitalized During Period CapitalizedContractCostAmountCapitalizedDuringPeriod	2997000	USD
CY2019Q1	seic	Capitalized Contract Cost Amount Capitalized During Period CapitalizedContractCostAmountCapitalizedDuringPeriod	1126000	USD
CY2020Q1	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	1228000	USD
CY2019Q1	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	988000	USD
CY2020Q1	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2020Q1	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	33519000	USD
CY2019Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	96991000	USD
CY2020Q1	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	32444000	USD
CY2019Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	28610000	USD
CY2020Q1	seic	Accrued Sub Advisory Distribution And Other Asset Management Fees Current AccruedSubAdvisoryDistributionAndOtherAssetManagementFeesCurrent	48478000	USD
CY2019Q4	seic	Accrued Sub Advisory Distribution And Other Asset Management Fees Current AccruedSubAdvisoryDistributionAndOtherAssetManagementFeesCurrent	46245000	USD
CY2020Q1	us-gaap	Dividends Payable Current DividendsPayableCurrent	0	USD
CY2019Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	52452000	USD
CY2020Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	23663000	USD
CY2019Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	2010000	USD
CY2020Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	41668000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	46493000	USD
CY2020Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	179772000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	272801000	USD
CY2020Q1	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	31420000	USD
CY2020Q1	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	145731000	USD
CY2019Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	33486000	USD
CY2019Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	156391000	USD
CY2020Q1	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	425697000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	543765000	USD
CY2020Q1	seic	Debt Securities Available For Sale And Equity Securities Fvni Cost DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNICost	109425000	USD
CY2020Q1	seic	Debt Securities Available For Sale And Equity Securities Fvni Accumulated Gross Unrealized Gain Before Tax DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNIAccumulatedGrossUnrealizedGainBeforeTax	2259000	USD
CY2020Q1	seic	Debt Securities Available For Sale And Equity Securities Fvni Accumulated Gross Unrealized Loss Before Tax DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNIAccumulatedGrossUnrealizedLossBeforeTax	1126000	USD
CY2020Q1	seic	Debt Securities Available For Sale And Equity Securities Fvni DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNI	110558000	USD
CY2019Q4	seic	Debt Securities Available For Sale And Equity Securities Fvni Cost DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNICost	115394000	USD
CY2019Q4	seic	Debt Securities Available For Sale And Equity Securities Fvni Accumulated Gross Unrealized Gain Before Tax DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNIAccumulatedGrossUnrealizedGainBeforeTax	1562000	USD
CY2019Q4	seic	Debt Securities Available For Sale And Equity Securities Fvni Accumulated Gross Unrealized Loss Before Tax DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNIAccumulatedGrossUnrealizedLossBeforeTax	39000	USD
CY2019Q4	seic	Debt Securities Available For Sale And Equity Securities Fvni DebtSecuritiesAvailableForSaleAndEquitySecuritiesFVNI	116917000	USD
CY2020Q1	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1696000	USD
CY2020Q1	seic	Accumulated Other Comprehensive Income Loss Debt Securities Available For Sale Securities Adjustment Tax AccumulatedOtherComprehensiveIncomeLossDebtSecuritiesAvailableForSaleSecuritiesAdjustmentTax	507000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	465000	USD
CY2019Q4	seic	Accumulated Other Comprehensive Income Loss Debt Securities Available For Sale Securities Adjustment Tax AccumulatedOtherComprehensiveIncomeLossDebtSecuritiesAvailableForSaleSecuritiesAdjustmentTax	140000	USD
CY2020Q1	us-gaap	Equity Securities Fv Ni Realized Gain EquitySecuritiesFvNiRealizedGain	189000	USD
CY2020Q1	us-gaap	Equity Securities Fv Ni Realized Loss EquitySecuritiesFvNiRealizedLoss	235000	USD
CY2019Q1	us-gaap	Equity Securities Fv Ni Realized Gain EquitySecuritiesFvNiRealizedGain	43000	USD
CY2019Q1	us-gaap	Equity Securities Fv Ni Realized Loss EquitySecuritiesFvNiRealizedLoss	3000	USD
CY2020Q1	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	31420000	USD
CY2019Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	33486000	USD
CY2020Q1	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	11553000	USD
CY2020Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6929000	USD
CY2019Q1	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	946000	USD
CY2020Q1	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	5548000	USD
CY2019Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5038000	USD
CY2020Q1	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1381000	USD
CY2019Q1	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	4092000	USD
CY2020Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	66934000	USD
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	18687000	USD
CY2020Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	81585000	USD
CY2020Q1	us-gaap	Share Price SharePrice	46.34
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	37.85
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	15055000	shares
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	7647000	shares
CY2020Q1	seic	Stock Repurchase Program Additional Shares Authorized StockRepurchaseProgramAdditionalSharesAuthorized	250000000	shares
CY2020Q1	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-11944000	USD
CY2020Q1	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-100000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-11844000	USD
CY2020Q1	us-gaap	Revenues Revenues	414762000	USD
CY2020Q1	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	286551000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	128211000	USD
CY2019Q1	us-gaap	Revenues Revenues	400820000	USD
CY2019Q1	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	277224000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	123596000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	110228000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	103561000	USD
CY2020Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	27120000	USD
CY2019Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	17254000	USD
CY2020Q1	us-gaap	Depreciation Depreciation	7473000	USD
CY2019Q1	us-gaap	Depreciation Depreciation	7331000	USD
CY2020Q1	us-gaap	Adjustment For Amortization AdjustmentForAmortization	13077000	USD
CY2019Q1	us-gaap	Adjustment For Amortization AdjustmentForAmortization	12679000	USD
CY2020Q1	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	16207000	USD
CY2019Q4	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	15356000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	16133000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	15194000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	2200000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1962000	USD
CY2020Q1	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	16207000	USD
CY2019Q4	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	15356000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	2200000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1962000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18407000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	17318000	USD
CY2020Q1	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	4950000	USD
CY2019Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	4896000	USD
CY2020Q1	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	13457000	USD
CY2019Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	12422000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18407000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	17318000	USD
CY2020Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020Q1	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.031
CY2019Q1	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.026
CY2020Q1	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.001
CY2019Q1	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.001
CY2020Q1	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.022
CY2019Q1	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.011
CY2020Q1	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003
CY2019Q1	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003
CY2020Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.215
CY2019Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.221
CY2020Q1	us-gaap	Loss Contingency Pending Claims Number LossContingencyPendingClaimsNumber	7	lawsuit
CY2020Q1	us-gaap	Loss Contingency Pending Claims Number LossContingencyPendingClaimsNumber	7	lawsuit
CY2020Q1	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0	USD
CY2020Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	921000	USD
CY2020Q1	us-gaap	Revenues Revenues	414762000	USD
CY2020Q1	us-gaap	Revenues Revenues	414762000	USD
CY2019Q1	us-gaap	Revenues Revenues	400820000	USD
CY2019Q1	us-gaap	Revenues Revenues	400820000	USD

Files In Submission

Name	View Source	Status
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0000350894-20-000026-index.html	Edgar Link	pending
0000350894-20-000026.txt	Edgar Link	pending
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seic-20200331.xsd	Edgar Link	pending
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seic-20200331_def.xml	Edgar Link	unprocessable
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seic-20200331_pre.xml	Edgar Link	unprocessable
seic-331202010q.htm	Edgar Link	pending
seic-331202010qex311.htm	Edgar Link	pending
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seic-331202010qex32.htm	Edgar Link	pending
seic-331202010q_htm.xml	Edgar Link	completed
seic-earningsreleaseex.htm	Edgar Link	pending
seinwnak.jpg	Edgar Link	pending
seinwnaka32.jpg	Edgar Link	pending
Show.js	Edgar Link	pending

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$SEIC
SEI INVESTMENTS CO Stock $seic

2020 Q2 Form 10-Q Financial Statement

#000035089420000026 Filed on April 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SEIC SEI INVESTMENTS CO Stock $seic

2020 Q2 Form 10-Q Financial Statement

#000035089420000026 Filed on April 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SEIC
SEI INVESTMENTS CO Stock $seic