$SEIC
SEI INVESTMENTS CO Stock $seic

$seic Overview Financials Valuation SEC Filings Company Website

2018 Q3 Form 10-Q Financial Statement

#000035089418000042 Filed on July 24, 2018

Income Statement

Concept	2018 Q3	2018 Q2	2017 Q2
Revenue	$408.7M	$404.8M	$372.3M
YoY Change	5.87%	8.73%	8.29%
Cost Of Revenue	$69.70M	$71.00M	$73.90M
YoY Change	-7.8%	-3.92%	4.38%
Gross Profit	$127.4M	$126.8M	$113.0M
YoY Change	11.01%	12.26%	5.2%
Gross Profit Margin	31.16%	31.32%	30.34%
Selling, General & Admin	$206.9M	$204.3M	$182.0M
YoY Change	8.61%	12.25%	12.48%
% of Gross Profit	162.45%	161.11%	161.12%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$7.255M	$7.138M	$6.599M
YoY Change	4.42%	8.17%	2.56%
% of Gross Profit	5.7%	5.63%	5.84%
Operating Expenses	$226.6M	$223.5M	$201.2M
YoY Change	7.29%	11.08%	12.09%
Operating Profit	$112.4M	$110.3M	$97.23M
YoY Change	13.28%	13.44%	3.96%
Interest Expense	$122.0K	$132.0K	$114.0K
YoY Change	-64.64%	15.79%	-39.04%
% of Operating Profit	0.11%	0.12%	0.12%
Other Income/Expense, Net
YoY Change
Pretax Income	$157.6M	$154.3M	$135.2M
YoY Change	11.95%	14.13%	8.21%
Income Tax	$29.28M	$32.58M	$43.39M
% Of Pretax Income	18.58%	21.12%	32.1%
Net Earnings	$128.3M	$121.7M	$91.77M
YoY Change	26.13%	32.59%	13.29%
Net Earnings / Revenue	31.4%	30.06%	24.65%
Basic Earnings Per Share	$0.82	$0.77	$0.58
Diluted Earnings Per Share	$0.80	$0.75	$0.57
COMMON SHARES
Basic Shares Outstanding	156.8M shares	158.1M shares	158.7M shares
Diluted Shares Outstanding	160.5M shares	162.2M shares	161.7M shares

Balance Sheet

Concept	2018 Q3	2018 Q2	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$770.9M	$722.4M	$681.8M
YoY Change	9.13%	5.95%	10.66%
Cash & Equivalents	$742.0M	$693.4M	$660.4M
Short-Term Investments	$28.90M	$29.00M	$21.40M
Other Short-Term Assets	$37.11M	$36.25M	$31.95M
YoY Change	21.53%	13.44%	5.76%
Inventory
Prepaid Expenses
Receivables	$371.5M	$356.1M	$298.6M
Other Receivables	$10.50M	$11.90M	$13.00M
Total Short-Term Assets	$1.194B	$1.130B	$1.029B
YoY Change	12.07%	9.85%	9.34%
LONG-TERM ASSETS
Property, Plant & Equipment	$145.9M	$144.3M	$145.5M
YoY Change	-1.51%	-0.83%	4.93%
Goodwill	$64.49M	$65.25M
YoY Change
Intangibles	$32.59M	$33.85M
YoY Change
Long-Term Investments	$134.7M	$146.6M	$136.6M
YoY Change	3.46%	7.32%	1.34%
Other Assets	$33.64M	$33.82M	$16.65M
YoY Change	97.37%	103.06%	20.19%
Total Long-Term Assets	$745.8M	$760.5M	$605.3M
YoY Change	8.65%	25.65%	4.46%
TOTAL ASSETS
Total Short-Term Assets	$1.194B	$1.130B	$1.029B
Total Long-Term Assets	$745.8M	$760.5M	$605.3M
Total Assets	$1.939B	$1.891B	$1.634B
YoY Change	10.73%	15.7%	7.48%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$9.161M	$7.519M	$5.407M
YoY Change	106.84%	39.06%	52.7%
Accrued Expenses	$207.7M	$193.8M	$170.6M
YoY Change	12.03%	13.63%	17.06%
Deferred Revenue	$5.054M	$5.587M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$221.9M	$206.9M	$178.8M
YoY Change	15.01%	15.74%	17.06%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change	-100.0%
Other Long-Term Liabilities	$26.00M	$26.39M	$14.10M
YoY Change	60.49%	87.13%	14.63%
Total Long-Term Liabilities	$26.00M	$26.39M	$14.10M
YoY Change	-53.74%	87.13%	14.63%
TOTAL LIABILITIES
Total Short-Term Liabilities	$221.9M	$206.9M	$178.8M
Total Long-Term Liabilities	$26.00M	$26.39M	$14.10M
Total Liabilities	$308.8M	$299.8M	$262.4M
YoY Change	-3.15%	14.28%	13.04%
SHAREHOLDERS EQUITY
Retained Earnings	$556.6M	$522.8M	$409.4M
YoY Change	24.14%	27.69%	7.55%
Common Stock	$1.103B	$1.096B	$990.3M
YoY Change	9.79%	10.7%	5.91%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.631B	$1.591B	$1.372B
YoY Change
Total Liabilities & Shareholders Equity	$1.939B	$1.891B	$1.634B
YoY Change	10.73%	15.7%	7.48%

Cashflow Statement

Concept	2018 Q3	2018 Q2	2017 Q2
OPERATING ACTIVITIES
Net Income	$128.3M	$121.7M	$91.77M
YoY Change	26.13%	32.59%	13.29%
Depreciation, Depletion And Amortization	$7.255M	$7.138M	$6.599M
YoY Change	4.42%	8.17%	2.56%
Cash From Operating Activities	$155.0M	$158.7M	$111.9M
YoY Change	17.87%	41.82%	31.8%
INVESTING ACTIVITIES
Capital Expenditures	-$17.70M	-$18.80M	-$23.40M
YoY Change	-30.31%	-19.66%	61.38%
Acquisitions
YoY Change
Other Investing Activities	$4.200M	-$29.70M	$2.000M
YoY Change	-105.53%	-1585.0%	-120.2%
Cash From Investing Activities	-$13.50M	-$48.50M	-$21.60M
YoY Change	-86.66%	124.54%	-11.84%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-92.50M	-156.4M	-97.50M
YoY Change	677.31%	60.41%	-1.91%
NET CHANGE
Cash From Operating Activities	155.0M	158.7M	111.9M
Cash From Investing Activities	-13.50M	-48.50M	-21.60M
Cash From Financing Activities	-92.50M	-156.4M	-97.50M
Net Change In Cash	49.00M	-46.20M	-7.200M
YoY Change	166.3%	541.67%	-81.54%
FREE CASH FLOW
Cash From Operating Activities	$155.0M	$158.7M	$111.9M
Capital Expenditures	-$17.70M	-$18.80M	-$23.40M
Free Cash Flow	$172.7M	$177.5M	$135.3M
YoY Change	10.07%	31.19%	36.12%

Facts In Submission

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	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
	dei	Document Period End Date DocumentPeriodEndDate	2018-06-30
	dei	Entity Central Index Key EntityCentralIndexKey	0000350894
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Trading Symbol TradingSymbol	SEIC
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CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	154254000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	135158000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	313012000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	263818000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32577000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43389000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	51497000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	83312000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	121677000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	91769000	USD
	us-gaap	Profit Loss ProfitLoss	261515000	USD
	us-gaap	Profit Loss ProfitLoss	180506000	USD
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.77
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.58
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.66
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.14
CY2018Q2	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	157542000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	158325000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	157488000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	158708000	shares
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.57
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.61
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.11
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	162225000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	161709000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	162825000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	162226000	shares
CY2018Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.30
CY2017Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.28
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.30
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.28
CY2018Q2	us-gaap	Profit Loss ProfitLoss	121677000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	91769000	USD
	us-gaap	Profit Loss ProfitLoss	261515000	USD
	us-gaap	Profit Loss ProfitLoss	180506000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-10203000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	7222000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-6826000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	9710000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	32000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	165000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1325000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-111000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	276000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	162000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1487000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-89000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	230000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-10059000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7498000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-8313000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9940000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	111618000	USD
CY2017Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	99267000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	253202000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	190446000	USD
	us-gaap	Profit Loss ProfitLoss	261515000	USD
	us-gaap	Profit Loss ProfitLoss	180506000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1361000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	4351000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	262876000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	184857000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	12671000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	10247000	USD
	us-gaap	Payments For Software PaymentsForSoftware	24613000	USD
	us-gaap	Payments For Software PaymentsForSoftware	33292000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	74957000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	28703000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	64626000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	26811000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	5794000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	10500000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1450000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-63909000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-46881000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	30000000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	189372000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	122066000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	69958000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	29127000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	94318000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	88862000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-243732000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-181801000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-6036000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	8488000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-50801000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-35337000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	747752000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	699201000	USD
CY2018Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	696951000	USD
CY2017Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	663864000	USD
CY2018Q2	seic	Expense Related To Soft Dollar Arrangement ExpenseRelatedToSoftDollarArrangement	3265000	USD
CY2017Q2	seic	Expense Related To Soft Dollar Arrangement ExpenseRelatedToSoftDollarArrangement	3429000	USD
	seic	Expense Related To Soft Dollar Arrangement ExpenseRelatedToSoftDollarArrangement	7232000	USD
	seic	Expense Related To Soft Dollar Arrangement ExpenseRelatedToSoftDollarArrangement	7502000	USD
	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	24613000	USD
	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	33292000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	121677000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	91769000	USD
	us-gaap	Profit Loss ProfitLoss	261515000	USD
	us-gaap	Profit Loss ProfitLoss	180506000	USD
CY2018Q2	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	157542000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	158325000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	157488000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	158708000	shares
CY2018Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	4683000	shares
CY2017Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3384000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	5337000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3518000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	162225000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	161709000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	162825000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	162226000	shares
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.77
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.58
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.66
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.14
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.57
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.61
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.11
CY2018Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6221000	shares
CY2017Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11255000	shares
CY2018Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	53.33
CY2017Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	37.68
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6138000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11267000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	53.03
	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	37.69
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	ReclassificationsCertain prior year amounts have been reclassified to conform to current year presentation.
	us-gaap	Profit Loss ProfitLoss	261515000	USD
	us-gaap	Profit Loss ProfitLoss	180506000	USD
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	14260000	USD
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	13399000	USD
	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	24015000	USD
	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	24587000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	81680000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	69880000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	89362000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	75142000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	10518000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12439000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-90000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	157000	USD
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-4893000	USD
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-918000	USD
	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	-549000	USD
	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	391000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-1000000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	0	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1222000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-503000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4713000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-122000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	3206000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-494000	USD
	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-3280000	USD
	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-12713000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	31835000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	34744000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	5090000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	4378000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2251000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2329000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-22121000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-23324000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	746000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-71000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1361000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	4351000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	262876000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	184857000	USD
CY2018Q2	us-gaap	Billed Contract Receivables BilledContractReceivables	85113000	USD
CY2017Q4	us-gaap	Billed Contract Receivables BilledContractReceivables	76760000	USD
CY2018Q2	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	218237000	USD
CY2017Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	194331000	USD
CY2018Q2	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	11886000	USD
CY2017Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	12310000	USD
CY2018Q2	seic	Receivables Gross Current ReceivablesGrossCurrent	315236000	USD
CY2017Q4	seic	Receivables Gross Current ReceivablesGrossCurrent	283401000	USD
CY2018Q2	seic	Allowancefor Doubtful Receivables AllowanceforDoubtfulReceivables	605000	USD
CY2017Q4	seic	Allowancefor Doubtful Receivables AllowanceforDoubtfulReceivables	695000	USD
CY2018Q2	us-gaap	Receivables Net Current ReceivablesNetCurrent	314631000	USD
CY2017Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	282706000	USD
CY2018Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	468322000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	456383000	USD
CY2018Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	323992000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	309955000	USD
CY2018Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	144330000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	146428000	USD
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	14260000	USD
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	13399000	USD
CY2018Q2	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	57077000	USD
CY2017Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	88960000	USD
CY2018Q2	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	29340000	USD
CY2017Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	29658000	USD
CY2018Q2	seic	Accrued Sub Advisory Distribution And Other Asset Management Fees Current AccruedSubAdvisoryDistributionAndOtherAssetManagementFeesCurrent	46455000	USD
CY2017Q4	seic	Accrued Sub Advisory Distribution And Other Asset Management Fees Current AccruedSubAdvisoryDistributionAndOtherAssetManagementFeesCurrent	42365000	USD
CY2018Q2	us-gaap	Dividends Payable Current DividendsPayableCurrent	0	USD
CY2017Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	47179000	USD
CY2018Q2	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	14387000	USD
CY2017Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	5583000	USD
CY2018Q2	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	46573000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	51313000	USD
CY2018Q2	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	193832000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	265058000	USD
CY2018Q2	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	11042000	USD
CY2018Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	77977000	USD
CY2018Q2	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	28981000	USD
CY2018Q2	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	5739000	USD
CY2018Q2	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	123739000	USD
CY2017Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	11250000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	76733000	USD
CY2017Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	21526000	USD
CY2017Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	6034000	USD
CY2017Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	115543000	USD
CY2018Q2	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	91258000	USD
CY2018Q2	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	548000	USD
CY2018Q2	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2787000	USD
CY2018Q2	us-gaap	Available For Sale Securities AvailableForSaleSecurities	89019000	USD
CY2017Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	88570000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	568000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1155000	USD
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	87983000	USD
CY2018Q2	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1873000	USD
CY2018Q2	seic	Accumulated Other Comprehensive Income Loss Debt Securities Available For Sale Securities Adjustment Tax AccumulatedOtherComprehensiveIncomeLossDebtSecuritiesAvailableForSaleSecuritiesAdjustmentTax	-559000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-779000	USD
CY2017Q4	seic	Accumulated Other Comprehensive Income Loss Debt Securities Available For Sale Securities Adjustment Tax AccumulatedOtherComprehensiveIncomeLossDebtSecuritiesAvailableForSaleSecuritiesAdjustmentTax	-233000	USD
CY2018Q2	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	28981000	USD
CY2017Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	21526000	USD
CY2018Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5323000	USD
CY2017Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6259000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	10518000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12439000	USD
CY2018Q2	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1142000	USD
CY2017Q2	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2189000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2245000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4342000	USD
CY2018Q2	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	4181000	USD
CY2017Q2	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	4070000	USD
	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	8273000	USD
	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	8097000	USD
CY2018Q2	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	54314000	USD
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	111031000	USD
CY2018Q2	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	271157000	USD
CY2018Q2	us-gaap	Share Price SharePrice	62.52
CY2018Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	29.36
CY2018Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	14399000	shares
CY2018Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	8178000	shares
CY2018Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.30
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	47139000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	44264000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-8151000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	162000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8313000	USD
CY2018Q2	us-gaap	Revenues Revenues	404830000	USD
CY2018Q2	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	278026000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	126804000	USD
CY2017Q2	us-gaap	Revenues Revenues	372331000	USD
CY2017Q2	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	259372000	USD
CY2017Q2	us-gaap	Gross Profit GrossProfit	112959000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	110290000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	97227000	USD
CY2018Q2	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	18786000	USD
CY2017Q2	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	23473000	USD
CY2018Q2	us-gaap	Depreciation Depreciation	7138000	USD
CY2017Q2	us-gaap	Depreciation Depreciation	6599000	USD
CY2018Q2	us-gaap	Adjustment For Amortization AdjustmentForAmortization	12161000	USD
CY2017Q2	us-gaap	Adjustment For Amortization AdjustmentForAmortization	12565000	USD
	us-gaap	Revenues Revenues	810428000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	552366000	USD
	us-gaap	Gross Profit GrossProfit	258062000	USD
	us-gaap	Revenues Revenues	732315000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	511234000	USD
	us-gaap	Gross Profit GrossProfit	221081000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	226606000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	190744000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	37284000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	43539000	USD
	us-gaap	Depreciation Depreciation	14260000	USD
	us-gaap	Depreciation Depreciation	13399000	USD
	us-gaap	Adjustment For Amortization AdjustmentForAmortization	24015000	USD
	us-gaap	Adjustment For Amortization AdjustmentForAmortization	24587000	USD
CY2018Q2	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	15167000	USD
CY2017Q4	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	14480000	USD
CY2018Q2	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	14546000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	13737000	USD
CY2018Q2	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1379000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1175000	USD
CY2018Q2	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	15167000	USD
CY2017Q4	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	14480000	USD
CY2018Q2	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1379000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1175000	USD
CY2018Q2	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16546000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15655000	USD
CY2018Q2	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	2944000	USD
CY2017Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	3275000	USD
CY2018Q2	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	13602000	USD
CY2017Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	12380000	USD
CY2018Q2	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16546000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15655000	USD
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.023
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.017
	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.023
	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.017
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.001
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.010
	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.001
	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.010
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.020
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.030
	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.065
	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.036
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.006
	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002
	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005
CY2018Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.211
CY2017Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.321
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.165
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.316
CY2018Q2	seic	Tax Cuts And Jobs Actof2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Liability TaxCutsAndJobsActof2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalLiability	11544000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-1000000	USD
CY2018Q2	seic	Tax Cuts And Jobs Actof2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Liability Current TaxCutsAndJobsActof2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalLiabilityCurrent	915000	USD
CY2018Q2	seic	Tax Cuts And Jobs Actof2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Liability Noncurrent TaxCutsAndJobsActof2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalLiabilityNoncurrent	9629000	USD
CY2018Q2	us-gaap	Loss Contingency Pending Claims Number LossContingencyPendingClaimsNumber	7	Lawsuit
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1696000	USD
CY2018Q2	us-gaap	Revenues Revenues	404830000	USD
CY2018Q2	us-gaap	Revenues Revenues	404830000	USD
	us-gaap	Revenues Revenues	810428000	USD
	us-gaap	Revenues Revenues	810428000	USD
CY2018Q2	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	21521000	USD
CY2018Q2	seic	Capitalized Contract Cost Amount Capitalized During Period CapitalizedContractCostAmountCapitalizedDuringPeriod	2267000	USD
	seic	Capitalized Contract Cost Amount Capitalized During Period CapitalizedContractCostAmountCapitalizedDuringPeriod	4083000	USD
CY2018Q2	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	619000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	1201000	USD
	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD

Files In Submission

Name	View Source	Status
0000350894-18-000042-index-headers.html	Edgar Link	pending
0000350894-18-000042-index.html	Edgar Link	pending
0000350894-18-000042.txt	Edgar Link	pending
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report.css	Edgar Link	pending
seic-20180630.xsd	Edgar Link	pending
seic-20180630_cal.xml	Edgar Link	unprocessable
seic-20180630_def.xml	Edgar Link	unprocessable
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seic-20180630_pre.xml	Edgar Link	unprocessable
seic-6301810q.htm	Edgar Link	pending
seic-6301810qex311.htm	Edgar Link	pending
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seic-6301810qex32.htm	Edgar Link	pending
seic-6301810q_htm.xml	Edgar Link	completed
seic-earningsreleaseex.htm	Edgar Link	pending
seiexhibit991logoa17.jpg	Edgar Link	pending
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$SEIC
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2018 Q3 Form 10-Q Financial Statement

#000035089418000042 Filed on July 24, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SEIC SEI INVESTMENTS CO Stock $seic

2018 Q3 Form 10-Q Financial Statement

#000035089418000042 Filed on July 24, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SEIC
SEI INVESTMENTS CO Stock $seic