$SEIC
SEI INVESTMENTS CO Stock $seic

$seic Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-Q Financial Statement

#000035089417000066 Filed on October 26, 2017

Income Statement

Concept	2017 Q4	2017 Q3	2016 Q3
Revenue	$408.2M	$386.0M	$354.6M
YoY Change	10.69%	8.85%	5.67%
Cost Of Revenue	$78.50M	$75.60M	$72.00M
YoY Change	-0.38%	5.0%	-6.74%
Gross Profit	$329.7M	$114.7M	$113.2M
YoY Change	13.69%	1.39%	13.3%
Gross Profit Margin	80.77%	29.72%	31.91%
Selling, General & Admin	$205.8M	$190.5M	$167.4M
YoY Change	18.82%	13.8%	8.35%
% of Gross Profit	62.42%	166.04%	147.93%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$17.00M	$6.948M	$6.576M
YoY Change	-8.6%	5.66%	7.66%
% of Gross Profit	5.16%	6.06%	5.81%
Operating Expenses	$222.8M	$211.2M	$185.4M
YoY Change	16.1%	13.92%	8.17%
Operating Profit	$106.9M	$99.24M	$97.22M
YoY Change	8.97%	2.08%	11.72%
Interest Expense	$45.50M	$345.0K	$115.0K
YoY Change	30.37%	200.0%	0.0%
% of Operating Profit	42.56%	0.35%	0.12%
Other Income/Expense, Net
YoY Change
Pretax Income	$152.5M	$140.8M	$130.9M
YoY Change	14.58%	7.55%	8.54%
Income Tax	$42.70M	$39.03M	$44.19M
% Of Pretax Income	28.01%	27.73%	33.76%
Net Earnings	$122.1M	$101.7M	$86.70M
YoY Change	37.84%	17.34%	9.16%
Net Earnings / Revenue	29.92%	26.36%	24.45%
Basic Earnings Per Share	$0.78	$0.64	$0.54
Diluted Earnings Per Share	$0.75	$0.63	$0.53
COMMON SHARES
Basic Shares Outstanding	157.5M shares	158.1M shares	161.3M shares
Diluted Shares Outstanding		161.1M shares	163.9M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2016 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$765.8M	$706.4M	$644.5M
YoY Change	6.81%	9.6%	-3.63%
Cash & Equivalents	$744.2M	$685.0M	$623.2M
Short-Term Investments	$21.50M	$21.50M	$21.30M
Other Short-Term Assets	$31.16M	$30.54M	$30.28M
YoY Change	12.99%	0.85%	3.67%
Inventory
Prepaid Expenses
Receivables	$327.1M	$311.4M	$282.0M
Other Receivables	$12.30M	$13.10M	$14.50M
Total Short-Term Assets	$1.140B	$1.065B	$976.8M
YoY Change	9.83%	9.03%	0.92%
LONG-TERM ASSETS
Property, Plant & Equipment	$146.4M	$148.1M	$149.3M
YoY Change	0.16%	-0.77%	4.85%
Goodwill	$52.99M
YoY Change
Intangibles	$28.58M
YoY Change
Long-Term Investments	$153.5M	$130.2M	$137.4M
YoY Change	10.11%	-5.24%	12.72%
Other Assets	$18.88M	$17.05M	$16.06M
YoY Change	22.18%	6.11%	-5.96%
Total Long-Term Assets	$713.6M	$686.4M	$596.8M
YoY Change	19.13%	15.02%	3.66%
TOTAL ASSETS
Total Short-Term Assets	$1.140B	$1.065B	$976.8M
Total Long-Term Assets	$713.6M	$686.4M	$596.8M
Total Assets	$1.853B	$1.751B	$1.574B
YoY Change	13.23%	11.3%	1.95%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$5.268M	$4.429M	$7.008M
YoY Change	-11.7%	-36.8%	75.11%
Accrued Expenses	$265.1M	$185.4M	$170.8M
YoY Change	10.2%	8.56%	11.4%
Deferred Revenue	$4.723M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$275.0M	$192.9M	$180.7M
YoY Change	10.3%	6.75%	11.62%
LONG-TERM LIABILITIES
Long-Term Debt	$30.00M	$40.00M	$0.00
YoY Change
Other Long-Term Liabilities	$12.38M	$16.20M	$14.10M
YoY Change		14.89%	14.63%
Total Long-Term Liabilities	$12.38M	$56.20M	$14.10M
YoY Change		298.58%	14.63%
TOTAL LIABILITIES
Total Short-Term Liabilities	$275.0M	$192.9M	$180.7M
Total Long-Term Liabilities	$12.38M	$56.20M	$14.10M
Total Liabilities	$376.5M	$318.9M	$260.4M
YoY Change	12.83%	22.47%	11.38%
SHAREHOLDERS EQUITY
Retained Earnings	$467.5M	$448.4M	$400.8M
YoY Change	21.73%	11.87%	-8.06%
Common Stock	$1.029B	$1.004B	$943.0M
YoY Change	7.55%	6.52%	5.45%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.477B	$1.433B	$1.313B
YoY Change
Total Liabilities & Shareholders Equity	$1.853B	$1.751B	$1.574B
YoY Change	13.23%	11.3%	1.95%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2016 Q3
OPERATING ACTIVITIES
Net Income	$122.1M	$101.7M	$86.70M
YoY Change	37.84%	17.34%	9.16%
Depreciation, Depletion And Amortization	$17.00M	$6.948M	$6.576M
YoY Change	-8.6%	5.66%	7.66%
Cash From Operating Activities	$143.5M	$131.5M	$125.9M
YoY Change	-0.9%	4.45%	6.97%
INVESTING ACTIVITIES
Capital Expenditures	-$17.70M	-$25.40M	-$31.30M
YoY Change	-19.18%	-18.85%	18.56%
Acquisitions
YoY Change
Other Investing Activities	-$6.500M	-$75.90M	-$3.900M
YoY Change	-187.84%	1846.15%	-208.33%
Cash From Investing Activities	-$24.20M	-$101.2M	-$35.10M
YoY Change	66.9%	188.32%	53.95%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-59.90M	-11.90M	-60.30M
YoY Change	10.11%	-80.27%	-9.87%
NET CHANGE
Cash From Operating Activities	143.5M	131.5M	125.9M
Cash From Investing Activities	-24.20M	-101.2M	-35.10M
Cash From Financing Activities	-59.90M	-11.90M	-60.30M
Net Change In Cash	59.40M	18.40M	30.50M
YoY Change	-21.74%	-39.67%	8.93%
FREE CASH FLOW
Cash From Operating Activities	$143.5M	$131.5M	$125.9M
Capital Expenditures	-$17.70M	-$25.40M	-$31.30M
Free Cash Flow	$161.2M	$156.9M	$157.2M
YoY Change	-3.3%	-0.19%	9.09%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
	dei	Document Period End Date DocumentPeriodEndDate	2017-09-30
	dei	Entity Central Index Key EntityCentralIndexKey	0000350894
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Trading Symbol TradingSymbol	SEIC
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CY2017Q3	seic	Segment Profit Loss SegmentProfitLoss	114730000	USD
	seic	Segment Profit Loss SegmentProfitLoss	335811000	USD
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	dei	Document Type DocumentType	10-Q
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	us-gaap	Interest Expense InterestExpense	571000	USD
	us-gaap	Interest Expense InterestExpense	416000	USD
CY2017Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	39333000	USD
CY2016Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	32565000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	109213000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	92042000	USD
CY2017Q3	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	0	USD
CY2016Q3	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	0	USD
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	0	USD
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	2791000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	140769000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	130890000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	404587000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	375432000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39030000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	44186000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	122342000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	130226000	USD
CY2017Q3	us-gaap	Profit Loss ProfitLoss	101739000	USD
CY2016Q3	us-gaap	Profit Loss ProfitLoss	86704000	USD
	us-gaap	Profit Loss ProfitLoss	282245000	USD
	us-gaap	Profit Loss ProfitLoss	245206000	USD
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.78
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.51
CY2017Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	157902000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	160916000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	158439000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	161908000	shares
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.53
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.74
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.49
CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	161148000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	163925000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	161866000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	165053000	shares
CY2017Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2016Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.28
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.26
CY2017Q3	us-gaap	Profit Loss ProfitLoss	101739000	USD
CY2016Q3	us-gaap	Profit Loss ProfitLoss	86704000	USD
	us-gaap	Profit Loss ProfitLoss	282245000	USD
	us-gaap	Profit Loss ProfitLoss	245206000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	7318000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-3053000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	17028000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-5704000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	294000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-160000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	435000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	190000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-105000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	399000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-102000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-58000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-194000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	629000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-266000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	456000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7717000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3111000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	17657000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-5248000	USD
CY2017Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	109456000	USD
CY2016Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	83593000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	299902000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	239958000	USD
	us-gaap	Profit Loss ProfitLoss	282245000	USD
	us-gaap	Profit Loss ProfitLoss	245206000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	34139000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	44228000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	316384000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	289434000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	20318000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	26656000	USD
	us-gaap	Payments For Software PaymentsForSoftware	48573000	USD
	us-gaap	Payments For Software PaymentsForSoftware	33196000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	50235000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	55162000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	52644000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	42625000	USD
	seic	Sale Of Marketable Securities SaleOfMarketableSecurities	0	USD
	seic	Sale Of Marketable Securities SaleOfMarketableSecurities	1225000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	80131000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	USD
	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	2791000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1450000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1313000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-148063000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-67060000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	40000000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	186494000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	224815000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	41626000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	35159000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	88862000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	84686000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-193730000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-274342000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	14679000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-4531000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-10730000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-56499000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	695701000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	679661000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	684971000	USD
CY2016Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	623162000	USD
	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	48573000	USD
	us-gaap	Capitalized Computer Software Additions CapitalizedComputerSoftwareAdditions	33196000	USD
CY2017Q3	us-gaap	Profit Loss ProfitLoss	101739000	USD
CY2016Q3	us-gaap	Profit Loss ProfitLoss	86704000	USD
	us-gaap	Profit Loss ProfitLoss	282245000	USD
	us-gaap	Profit Loss ProfitLoss	245206000	USD
CY2017Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	157902000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	160916000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	158439000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	161908000	shares
CY2017Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3246000	shares
CY2016Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3009000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3427000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3145000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	161148000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	163925000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	161866000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	165053000	shares
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.78
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.51
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.53
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.74
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.49
CY2017Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11324000	shares
CY2016Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	10258000	shares
CY2017Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	37.81
CY2016Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	34.11
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11286000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	10384000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	37.73
	us-gaap	Antidilutive Securities Excluded From Computation Of Net Income Per Outstanding Unit Amount AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount	34.07
	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	282245000	USD
	us-gaap	Profit Loss ProfitLoss	245206000	USD
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	20347000	USD
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	19457000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	38332000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	33684000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	109213000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	92042000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	117447000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	102246000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	19527000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12044000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	176000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	338000	USD
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-1143000	USD
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	1521000	USD
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	0	USD
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	2791000	USD
	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	1036000	USD
	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	320000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	0	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	-5941000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	106000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2706000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-79000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2463000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1067000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-602000	USD
	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-10800000	USD
	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	685000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	43661000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	25037000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	2962000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	4072000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-1748000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2497000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-15856000	USD
CY2016Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	10826000	USD
CY2017Q3	seic	Receivables Gross Current ReceivablesGrossCurrent	274234000	USD
CY2016Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	168971000	USD
CY2017Q3	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	13052000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-6945000	USD
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-409000	USD
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	589000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	34139000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	44228000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	316384000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	289434000	USD
	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	New Accounting Pronouncements<div style="line-height:120%;padding-top:6px;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (ASU 2014-09), requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014-09 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. The updated standard permits the use of either the retrospective or cumulative effect transition method. The FASB has issued several amendments to the standard, including principal versus agent guidance and identifying performance obligations. ASU 2014-09 will become effective for the Company during the first quarter 2018. </span></div><div style="line-height:120%;padding-top:6px;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company continues to assess the impact of ASU 2014-09 on its revenue arrangements. The Company expects the adoption of ASU 2014-09 to have an impact to its business processes, financial reporting disclosures and internal controls over financial reporting. </span></div><div style="line-height:120%;padding-top:6px;text-align:left;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">As part of its project plan’s preliminary assessment and design implementation phases for the adoption of ASU 2014-09, the Company has adopted implementation controls that allows it to properly and timely adopt ASU 2014-09 on the effective date. The Company will make continuous updates to the quarterly and year-end disclosures, with a focus on both status and </span></div><div style="line-height:120%;padding-top:6px;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">internal controls over financial reporting. The new standard will have a significant impact to the Company's financial statement disclosures, including identifying information that the Company will have to develop under the new standard.</span></div><div style="line-height:120%;padding-top:6px;text-align:justify;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company’s implementation plan includes the following:</span></div><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:77px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:46px;"><span style="font-family:inherit;font-size:10pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Developed a phased implementation project plan with a specific timeline and milestones;</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:77px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:46px;"><span style="font-family:inherit;font-size:10pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Developed an understanding of the new standard and its requirements;</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:77px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:46px;"><span style="font-family:inherit;font-size:10pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Analyzed the Company’s revenue streams;</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:77px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:46px;"><span style="font-family:inherit;font-size:10pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Gathering and evaluating the required and relevant information for ASU 2014-09; and</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:77px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:46px;"><span style="font-family:inherit;font-size:10pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Continue to monitor the impact of ASU 2014-09 and the various interpretations and supplemental guidance that become available.</span></div></td></tr></table><div style="line-height:120%;padding-top:6px;text-align:justify;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Upon its initial assessment, the Company has made the following observations:</span></div><div style="line-height:120%;padding-top:4px;text-align:justify;padding-left:24px;text-indent:54px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Revenue:</span></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:138px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:108px;"><span style="font-family:inherit;font-size:10pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company offers many services which are bundled together, and provided and completed for the client on a monthly basis. In assessing these contracts, the Company expects to continue to recognize revenue for these types of services on a monthly basis as the client consumes the benefits continuously over time. Similarly, the Company expects that transaction-based and trade execution fees based on current period activity will not be affected by the adoption of ASU 2014-09. </span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:138px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:108px;"><span style="font-family:inherit;font-size:10pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company continues to assess the effect of the adoption of the new standard on the timing of the recognition of implementation fees, which are recognized in Information processing and software servicing fees as well as fund conversion fees and other ancillary fees recognized in Asset management, administration and distribution fees. While the Company has not made a final determination, the timing of the recognition for these revenues may change.</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:138px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:108px;"><span style="font-family:inherit;font-size:10pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The new standard also modified some of the principal and agent considerations which may result in changes to gross or net treatment of revenue and expenses but would not affect final net income. </span></div></td></tr></table><div style="line-height:120%;padding-top:4px;text-align:justify;padding-left:24px;text-indent:54px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Contract costs:</span></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:138px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:108px;"><span style="font-family:inherit;font-size:10pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company expects to capitalize the costs of obtaining the contracts related to the information processing and software servicing fees revenue stream affected by the standard. Sales commissions and contract costs related to fund conversions are also expected to be capitalized. Under current guidance, contract costs are expensed at inception of an agreement but under the new standard, the costs will generally be capitalized and amortized over the period of customer life as defined in the new standard, unless a practical expedient is applied to fully expense contract costs for contracts with an amortization period of one year or less.</span></div></td></tr></table><div style="line-height:120%;padding-top:4px;text-align:justify;padding-left:24px;text-indent:54px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Transition method:</span></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:138px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:10pt;padding-left:108px;"><span style="font-family:inherit;font-size:10pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The new standard provides companies with alternative methods of adoption. The Company is in the process of determining the method of adoption, which depends in part upon the completion of the evaluation of the remaining revenue arrangements. The Company anticipates it will elect the cumulative effect transition method.</span></div></td></tr></table><div style="line-height:120%;padding-top:6px;text-align:justify;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Upon completion of the Company’s implementation plan and evaluation of the remaining revenue contracts, the Company plans to adopt additional controls around internal controls over financial reporting and its business processes for any new revenue arrangements that the Company enters. The Company is on target to complete its assessment of ASU 2014-09 and the impact on the Company’s consolidated financial statements and related disclosures as of January 1, 2018. </span></div><div style="line-height:120%;padding-top:6px;text-align:left;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In February 2016, the FASB issued ASU No. 2016-02, Leases (ASU 2016-02) requiring lessees to recognize a right-of-use asset and a lease liability on the balance sheet for all leases with the exception of short-term leases. For lessees, leases will continue to be classified as either operating or finance leases in the income statement. Lessor accounting is similar to the current model but updated to align with certain changes to the lessee model. Lessors will continue to classify leases as operating, direct financing or sales-type leases. The new standard must be adopted using a modified retrospective transition and requires application of the new guidance at the beginning of the earliest comparative period presented. The updated standard is effective for the Company beginning in the first quarter of 2019. Early adoption is permitted. The Company is currently evaluating the transition method that will be elected and the effect that the updated standard will have on its consolidated financial statements and related disclosures. </span></div><div style="line-height:120%;padding-top:6px;text-align:left;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment (ASU 2017-04). The objective of ASU 2017-04 is to simplify the subsequent measurement of goodwill by entities performing their annual goodwill impairment tests by comparing the fair value of a reporting unit, including income tax effects from any tax-deductible goodwill, with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds fair value. ASU 2017-04 is effective for the Company beginning in the first quarter of 2020. Early adoption is permitted. The </span></div>Company is currently evaluating the impact of adopting ASU 2017-04 on its consolidated financial statements and related disclosures.
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CY2016Q4	us-gaap	Billed Contract Receivables BilledContractReceivables	48683000	USD
CY2017Q3	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	192214000	USD
CY2016Q4	seic	Receivables Gross Current ReceivablesGrossCurrent	228480000	USD
CY2017Q3	seic	Allowancefor Doubtful Receivables AllowanceforDoubtfulReceivables	699000	USD
CY2016Q4	seic	Allowancefor Doubtful Receivables AllowanceforDoubtfulReceivables	523000	USD
CY2017Q3	us-gaap	Receivables Net Current ReceivablesNetCurrent	273535000	USD
CY2016Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	227957000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	451007000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	431512000	USD
CY2017Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	302901000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	285322000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	148106000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	146190000	USD
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	20347000	USD
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	19457000	USD
CY2017Q3	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	63313000	USD
CY2016Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	79735000	USD
CY2017Q3	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	29487000	USD
CY2016Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	24428000	USD
CY2017Q3	seic	Accrued Sub Advisory Distribution And Other Asset Management Fees Current AccruedSubAdvisoryDistributionAndOtherAssetManagementFeesCurrent	38631000	USD
CY2016Q4	seic	Accrued Sub Advisory Distribution And Other Asset Management Fees Current AccruedSubAdvisoryDistributionAndOtherAssetManagementFeesCurrent	41666000	USD
CY2017Q3	us-gaap	Dividends Payable Current DividendsPayableCurrent	0	USD
CY2016Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	44596000	USD
CY2017Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	53937000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	50100000	USD
CY2017Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	185368000	USD
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	240525000	USD
CY2017Q3	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	10863000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	71389000	USD
CY2017Q3	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	21469000	USD
CY2017Q3	us-gaap	Alternative Investments Fair Value Disclosure AlternativeInvestmentsFairValueDisclosure	5738000	USD
CY2017Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	109459000	USD
CY2016Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	9581000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	74452000	USD
CY2016Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	21339000	USD
CY2016Q4	us-gaap	Alternative Investments Fair Value Disclosure AlternativeInvestmentsFairValueDisclosure	4858000	USD
CY2016Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	110230000	USD
CY2017Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	82527000	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	463000	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	738000	USD
CY2017Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	82252000	USD
CY2016Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	85168000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	252000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1387000	USD
CY2016Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	84033000	USD
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-207000	USD
CY2017Q3	seic	Accumulated Other Comprehensive Income Loss Availableforsale Securities Adjustment Tax AccumulatedOtherComprehensiveIncomeLossAvailableforsaleSecuritiesAdjustmentTax	-68000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-836000	USD
CY2016Q4	seic	Accumulated Other Comprehensive Income Loss Availableforsale Securities Adjustment Tax AccumulatedOtherComprehensiveIncomeLossAvailableforsaleSecuritiesAdjustmentTax	-299000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	428000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	706000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	270000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	679000	USD
CY2017Q3	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	21469000	USD
CY2016Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	21339000	USD
CY2017Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7088000	USD
CY2016Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4066000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	19527000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12044000	USD
CY2017Q3	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2517000	USD
CY2016Q3	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1466000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	6859000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4235000	USD
CY2017Q3	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	4571000	USD
CY2016Q3	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	2600000	USD
	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	12668000	USD
	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	7809000	USD
CY2017Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	57525000	USD
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	59991000	USD
CY2017Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	192056000	USD
CY2017Q3	us-gaap	Share Price SharePrice	61.06
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	21.34
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	16158000	shares
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	4835000	shares
CY2017Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.28
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	44264000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	42001000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-37955000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	17463000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-194000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	17657000	USD
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-20298000	USD
CY2017Q3	us-gaap	Revenues Revenues	386018000	USD
CY2017Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	271288000	USD
CY2017Q3	us-gaap	Gross Profit GrossProfit	114730000	USD
CY2016Q3	us-gaap	Revenues Revenues	354641000	USD
CY2016Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	241482000	USD
CY2016Q3	us-gaap	Gross Profit GrossProfit	113159000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	99237000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	97218000	USD
CY2017Q3	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	25352000	USD
CY2016Q3	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	31206000	USD
CY2017Q3	us-gaap	Depreciation Depreciation	6948000	USD
CY2016Q3	us-gaap	Depreciation Depreciation	6576000	USD
CY2017Q3	us-gaap	Adjustment For Amortization AdjustmentForAmortization	13745000	USD
CY2016Q3	us-gaap	Adjustment For Amortization AdjustmentForAmortization	11388000	USD
	us-gaap	Revenues Revenues	1118333000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	782522000	USD
	us-gaap	Gross Profit GrossProfit	335811000	USD
	us-gaap	Revenues Revenues	1032735000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	712342000	USD
	us-gaap	Gross Profit GrossProfit	320393000	USD
	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	2791000	USD
	seic	Segment Profit Loss SegmentProfitLoss	323184000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	289981000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	277553000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	68891000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	59852000	USD
	us-gaap	Depreciation Depreciation	20347000	USD
	us-gaap	Depreciation Depreciation	19457000	USD
	us-gaap	Adjustment For Amortization AdjustmentForAmortization	38332000	USD
	us-gaap	Adjustment For Amortization AdjustmentForAmortization	33684000	USD
CY2017Q3	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	16038000	USD
CY2016Q4	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	17287000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	13386000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	14868000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1361000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1224000	USD
CY2017Q3	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	16038000	USD
CY2016Q4	seic	Gross Liability For Unrecognized Tax Benefits Exclusive Of Interest And Penalties GrossLiabilityForUnrecognizedTaxBenefitsExclusiveOfInterestAndPenalties	17287000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1361000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1224000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	17399000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18511000	USD
CY2017Q3	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	2648000	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	3866000	USD
CY2017Q3	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	14751000	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	14645000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	17399000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18511000	USD
CY2017Q3	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2016Q3	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	0.350
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2017Q3	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.017
CY2016Q3	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.012
	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	0.015
CY2017Q3	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.010
CY2016Q3	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.008
	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	-0.008
CY2017Q3	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.045
CY2016Q3	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0
	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.039
	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0
CY2017Q3	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Other EffectiveIncomeTaxRateReconciliationTaxContingenciesOther	-0.026
CY2016Q3	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Other EffectiveIncomeTaxRateReconciliationTaxContingenciesOther	-0.008
	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Other EffectiveIncomeTaxRateReconciliationTaxContingenciesOther	-0.009
	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Other EffectiveIncomeTaxRateReconciliationTaxContingenciesOther	-0.003
CY2017Q3	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.009
CY2016Q3	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.008
	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.007
	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.007
CY2017Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.277
CY2016Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.338
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.302
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.347

Files In Submission

Name	View Source	Status
0000350894-17-000066-index-headers.html	Edgar Link	pending
0000350894-17-000066-index.html	Edgar Link	pending
0000350894-17-000066.txt	Edgar Link	pending
0000350894-17-000066-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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R6.htm	Edgar Link	pending
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R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
seic-20170930.xsd	Edgar Link	pending
seic-20170930_cal.xml	Edgar Link	unprocessable
seic-20170930_def.xml	Edgar Link	unprocessable
seic-20170930_lab.xml	Edgar Link	unprocessable
seic-20170930_pre.xml	Edgar Link	unprocessable
seic-9301710q.htm	Edgar Link	pending
seic-9301710qex311.htm	Edgar Link	pending
seic-9301710qex312.htm	Edgar Link	pending
seic-9301710qex32.htm	Edgar Link	pending
seic-9301710q_htm.xml	Edgar Link	completed
seic-earningsreleaseex.htm	Edgar Link	pending
seiexhibit991logoa13.jpg	Edgar Link	pending
seinwnaka02.jpg	Edgar Link	pending
Show.js	Edgar Link	pending

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$SEIC
SEI INVESTMENTS CO Stock $seic

2017 Q4 Form 10-Q Financial Statement

#000035089417000066 Filed on October 26, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SEIC SEI INVESTMENTS CO Stock $seic

2017 Q4 Form 10-Q Financial Statement

#000035089417000066 Filed on October 26, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SEIC
SEI INVESTMENTS CO Stock $seic