$APAM
Artisan Partners Asset Management Inc. Stock $apam

$apam Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000151730221000019 Filed on February 23, 2021

Income Statement

Concept	2019 Q4	2018	2017 Q4
Revenue	$208.3M	$828.6M	$210.7M
YoY Change	8.75%	4.15%	16.11%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$129.0M	$523.7M	$129.5M
YoY Change	1.34%	2.85%	5.37%
% of Gross Profit
Research & Development		$37.16M
YoY Change		9.07%
% of Gross Profit
Depreciation & Amortization	$1.600M	$5.668M	$1.400M
YoY Change	14.29%	7.0%	-6.67%
% of Gross Profit
Operating Expenses	$129.0M	$523.7M	$129.5M
YoY Change	1.34%	2.84%	5.37%
Operating Profit	$79.32M	$304.9M	$81.25M
YoY Change	23.47%	6.47%	38.68%
Interest Expense	$4.400M	$11.22M	$500.0K
YoY Change	-163.77%	-1.97%	-120.0%
% of Operating Profit	5.55%	3.68%	0.62%
Other Income/Expense, Net	$0.00	-$3.153M	$290.4M
YoY Change		-101.11%
Pretax Income	$83.70M	$301.8M	$372.2M
YoY Change	46.07%	-47.17%	564.64%
Income Tax	$14.20M	$47.60M	$309.3M
% Of Pretax Income	16.97%	15.77%	83.1%
Net Earnings	$44.55M	$158.3M	-$27.49M
YoY Change	37.04%	219.18%	-242.46%
Net Earnings / Revenue	21.39%	19.1%	-13.05%
Basic Earnings Per Share		$2.84	-$0.67
Diluted Earnings Per Share	$862.7K	$2.84	-$592.7K
COMMON SHARES
Basic Shares Outstanding		48.86M shares
Diluted Shares Outstanding		48.86M shares

Balance Sheet

Concept	2019 Q4	2018	2017 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$143.6M	$174.9M	$159.2M
YoY Change	-17.9%	9.86%	1.53%
Cash & Equivalents	$134.6M	$174.9M	$137.3M
Short-Term Investments
Other Short-Term Assets	$9.600M	$9.900M	$9.000M
YoY Change	-3.03%	10.0%	3.45%
Inventory
Prepaid Expenses
Receivables	$83.50M	$73.30M	$93.50M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$236.7M	$258.1M	$261.7M
YoY Change	-8.29%	-1.38%	16.21%
LONG-TERM ASSETS
Property, Plant & Equipment	$39.50M	$29.10M	$21.03M
YoY Change	35.54%	38.57%	5.03%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$16.34M	$84.30M	$0.00
YoY Change	33.33%	-29.93%	-100.0%
Other Assets	$436.5M	$429.8M	$429.8M
YoY Change	1.56%	0.0%	-36.71%
Total Long-Term Assets	$696.9M	$546.9M	$575.5M
YoY Change	27.43%	-4.97%	-19.06%
TOTAL ASSETS
Total Short-Term Assets	$236.7M	$258.1M	$261.7M
Total Long-Term Assets	$696.9M	$546.9M	$575.5M
Total Assets	$933.6M	$805.0M	$837.2M
YoY Change	15.98%	-3.85%	-10.58%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$54.10M	$21.50M	$24.80M
YoY Change	151.63%	-13.31%	58.97%
Accrued Expenses	$117.3M	$12.70M	$2.900M
YoY Change	823.62%	337.93%	-76.98%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$546.7M	$403.6M	$413.1M
YoY Change	35.46%	-2.3%	-32.83%
LONG-TERM LIABILITIES
Long-Term Debt	$199.1M	$199.3M	$199.1M
YoY Change	-0.1%	0.1%	-0.2%
Other Long-Term Liabilities	$6.200M	$27.40M	$54.20M
YoY Change	-77.37%	-49.45%	1255.0%
Total Long-Term Liabilities	$205.3M	$226.7M	$253.3M
YoY Change	-9.44%	-10.5%	24.47%
TOTAL LIABILITIES
Total Short-Term Liabilities	$546.7M	$403.6M	$413.1M
Total Long-Term Liabilities	$205.3M	$226.7M	$253.3M
Total Liabilities	$752.0M	$670.0M	$666.5M
YoY Change	19.33%	-7.87%	-18.56%
SHAREHOLDERS EQUITY
Retained Earnings	$44.46M		-$37.87M
YoY Change	15.12%		-382.72%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$133.0M	$135.0M	$109.9M
YoY Change
Total Liabilities & Shareholders Equity	$933.6M	$805.0M	$837.2M
YoY Change	15.98%	-3.85%	-10.58%

Cashflow Statement

Concept	2019 Q4	2018	2017 Q4
OPERATING ACTIVITIES
Net Income	$44.55M	$158.3M	-$27.49M
YoY Change	37.04%	219.18%	-242.46%
Depreciation, Depletion And Amortization	$1.600M	$5.668M	$1.400M
YoY Change	14.29%	7.0%	-6.67%
Cash From Operating Activities	$31.20M	$333.3M	-$42.70M
YoY Change	511.76%	47.52%	-452.89%
INVESTING ACTIVITIES
Capital Expenditures	-$1.100M	$2.834M	-$1.500M
YoY Change	-77.55%	79.59%	114.29%
Acquisitions
YoY Change
Other Investing Activities	$300.0K	-$500.0K	$0.00
YoY Change	-250.0%	-145.45%	-100.0%
Cash From Investing Activities	-$800.0K	-$14.34M	-$1.500M
YoY Change	-84.62%	204.93%	-165.22%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-60.10M	-$263.5M	-18.30M
YoY Change	15.8%	20.39%	-74.01%
NET CHANGE
Cash From Operating Activities	31.20M	$333.3M	-42.70M
Cash From Investing Activities	-800.0K	-$14.34M	-1.500M
Cash From Financing Activities	-60.10M	-$263.5M	-18.30M
Net Change In Cash	-29.70M	$55.50M	-62.50M
YoY Change	-42.88%	2222.09%	11.61%
FREE CASH FLOW
Cash From Operating Activities	$31.20M	$333.3M	-$42.70M
Capital Expenditures	-$1.100M	$2.834M	-$1.500M
Free Cash Flow	$32.30M	$330.5M	-$41.20M
YoY Change	223.0%	47.29%	-421.88%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001517302
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-35826
CY2020	dei	Entity Registrant Name EntityRegistrantName	Artisan Partners Asset Management Inc.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	45-0969585
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	875 E. Wisconsin Avenue
CY2020	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 800
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Milwaukee
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	WI
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	53202
CY2020	dei	City Area Code CityAreaCode	414
CY2020	dei	Local Phone Number LocalPhoneNumber	390-6100
CY2020	dei	Security12b Title Security12bTitle	Class A Common Stock, $0.01 par value
CY2020	dei	Trading Symbol TradingSymbol	APAM
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	2000000000.0	USD
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CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	2564000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	21478000	USD
CY2018	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	46572000	USD
CY2018	us-gaap	Noncontrolling Interest Decrease From Deconsolidation NoncontrollingInterestDecreaseFromDeconsolidation	79631000	USD
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	103434000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	167780000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	140487000	USD
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	34349000	USD
CY2019	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	236591000	USD
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	4866000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	732000	USD
CY2019	us-gaap	Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Changes Additional Interest Issued To Parent ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesAdditionalInterestIssuedToParent	0	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	43095000	USD
CY2019	apam	Adjustmentsto Paid In Capital Establishmentof Deferred Tax Assets Net Of Amounts Payable Under Tax Receivable Agreements AdjustmentstoPaidInCapitalEstablishmentofDeferredTaxAssetsNetOfAmountsPayableUnderTaxReceivableAgreements	2716000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	-22000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	0	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	2078000	USD
CY2019	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	0	USD
CY2019	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	3895000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	94842000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	188178000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	138501000	USD
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	43110000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	138501000	USD
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	43110000	USD
CY2020	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	293696000	USD
CY2020	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	14807000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	732000	USD
CY2020	us-gaap	Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Changes Additional Interest Issued To Parent ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesAdditionalInterestIssuedToParent	0	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	37027000	USD
CY2020	apam	Adjustmentsto Paid In Capital Establishmentof Deferred Tax Assets Net Of Amounts Payable Under Tax Receivable Agreements AdjustmentstoPaidInCapitalEstablishmentofDeferredTaxAssetsNetOfAmountsPayableUnderTaxReceivableAgreements	14740000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	62714000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	0	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4530000	USD
CY2020	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	0	USD
CY2020	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	63027000	USD
CY2020	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	38277000	USD
CY2020	us-gaap	Noncontrolling Interest Decrease From Deconsolidation NoncontrollingInterestDecreaseFromDeconsolidation	2441000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	85805000	USD
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	203006000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	191042000	USD
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	93753000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	308503000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	241457000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	254190000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6625000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6233000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5668000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	27990000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7356000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	24863000	USD
CY2020	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	871000	USD
CY2019	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	2107000	USD
CY2018	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	0	USD
CY2020	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	-1499000	USD
CY2019	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	1533000	USD
CY2018	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	4086000	USD
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	160000	USD
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	5101000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	688000	USD
CY2020	apam	Net Gain Loss On The Tax Receivable Agreements NetGainLossOnTheTaxReceivableAgreements	4674000	USD
CY2019	apam	Net Gain Loss On The Tax Receivable Agreements NetGainLossOnTheTaxReceivableAgreements	19557000	USD
CY2018	apam	Net Gain Loss On The Tax Receivable Agreements NetGainLossOnTheTaxReceivableAgreements	-251000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-5000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-275000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-18000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	422000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	463000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	457000	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	37027000	USD
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	43095000	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	53554000	USD
CY2020	apam	Net Investment Gain Lossof Consolidated Investment Products NetInvestmentGainLossofConsolidatedInvestmentProducts	26147000	USD
CY2019	apam	Net Investment Gain Lossof Consolidated Investment Products NetInvestmentGainLossofConsolidatedInvestmentProducts	10084000	USD
CY2018	apam	Net Investment Gain Lossof Consolidated Investment Products NetInvestmentGainLossofConsolidatedInvestmentProducts	5721000	USD
CY2020	apam	Purchaseof Investmentsby Consolidated Investment Products PurchaseofInvestmentsbyConsolidatedInvestmentProducts	191274000	USD
CY2019	apam	Purchaseof Investmentsby Consolidated Investment Products PurchaseofInvestmentsbyConsolidatedInvestmentProducts	123366000	USD
CY2018	apam	Purchaseof Investmentsby Consolidated Investment Products PurchaseofInvestmentsbyConsolidatedInvestmentProducts	643548000	USD
CY2020	apam	Proceedsfrom Saleof Investmentsby Consolidated Investment Products ProceedsfromSaleofInvestmentsbyConsolidatedInvestmentProducts	137561000	USD
CY2019	apam	Proceedsfrom Saleof Investmentsby Consolidated Investment Products ProceedsfromSaleofInvestmentsbyConsolidatedInvestmentProducts	75468000	USD
CY2018	apam	Proceedsfrom Saleof Investmentsby Consolidated Investment Products ProceedsfromSaleofInvestmentsbyConsolidatedInvestmentProducts	611117000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	18020000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	14178000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-9002000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	6110000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1031000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2275000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	1622000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	6881000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	10027000	USD
CY2020	apam	Net Changein Operating Assetsand Liabilitiesof Consolidated Investment Products NetChangeinOperatingAssetsandLiabilitiesofConsolidatedInvestmentProducts	-36587000	USD
CY2019	apam	Net Changein Operating Assetsand Liabilitiesof Consolidated Investment Products NetChangeinOperatingAssetsandLiabilitiesofConsolidatedInvestmentProducts	-40066000	USD
CY2018	apam	Net Changein Operating Assetsand Liabilitiesof Consolidated Investment Products NetChangeinOperatingAssetsandLiabilitiesofConsolidatedInvestmentProducts	-12823000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	318677000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	292793000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	333322000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2049000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3498000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2834000	USD
CY2020	apam	Payments For Leasehold Improvements PaymentsForLeaseholdImprovements	1050000	USD
CY2019	apam	Payments For Leasehold Improvements PaymentsForLeaseholdImprovements	14286000	USD
CY2018	apam	Payments For Leasehold Improvements PaymentsForLeaseholdImprovements	11007000	USD
CY2020	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	24001000	USD
CY2019	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	288000	USD
CY2018	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	0	USD
CY2020	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	2150000	USD
CY2019	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	10000	USD
CY2018	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	500000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	18752000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-17506000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-14341000	USD
CY2020	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	85805000	USD
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	94842000	USD
CY2018	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	103434000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	203006000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	188178000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	167780000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	366000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	50000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	USD
CY2020	us-gaap	Repayments Of Debt RepaymentsOfDebt	0	USD
CY2019	us-gaap	Repayments Of Debt RepaymentsOfDebt	50000000	USD
CY2018	us-gaap	Repayments Of Debt RepaymentsOfDebt	0	USD
CY2020	apam	Tax Receivable Agreement Payments TaxReceivableAgreementPayments	26943000	USD
CY2019	apam	Tax Receivable Agreement Payments TaxReceivableAgreementPayments	24998000	USD
CY2018	apam	Tax Receivable Agreement Payments TaxReceivableAgreementPayments	36111000	USD
CY2020	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	63027000	USD
CY2019	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	0	USD
CY2018	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	21478000	USD
CY2020	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	227000	USD
CY2019	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
CY2018	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	166000	USD
CY2020	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	63027000	USD
CY2019	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	0	USD
CY2018	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	21478000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4530000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2078000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2564000	USD
CY2020	apam	Capital Contributionsto Consolidated Investment Products CapitalContributionstoConsolidatedInvestmentProducts	38277000	USD
CY2019	apam	Capital Contributionsto Consolidated Investment Products CapitalContributionstoConsolidatedInvestmentProducts	3895000	USD
CY2018	apam	Capital Contributionsto Consolidated Investment Products CapitalContributionstoConsolidatedInvestmentProducts	46572000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-282234000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-306567000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-263483000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	55195000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-31280000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	55498000	USD
CY2020	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	0	USD
CY2019	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	0	USD
CY2018	us-gaap	Cash Divested From Deconsolidation CashDivestedFromDeconsolidation	39759000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	144255000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	175535000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	159796000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	199450000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	144255000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	175535000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	629000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	629000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	629000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	199450000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	144255000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	175535000	USD
CY2020	apam	Non Cash Transaction Initial Establishment Of Deferred Tax Assets NonCashTransactionInitialEstablishmentOfDeferredTaxAssets	77756000	USD
CY2019	apam	Non Cash Transaction Initial Establishment Of Deferred Tax Assets NonCashTransactionInitialEstablishmentOfDeferredTaxAssets	35999000	USD
CY2018	apam	Non Cash Transaction Initial Establishment Of Deferred Tax Assets NonCashTransactionInitialEstablishmentOfDeferredTaxAssets	24679000	USD
CY2020	apam	Non Cash Transaction Initial Establishment Of Amounts Payable Under Tax Receivable Agreements NonCashTransactionInitialEstablishmentOfAmountsPayableUnderTaxReceivableAgreements	64087000	USD
CY2019	apam	Non Cash Transaction Initial Establishment Of Amounts Payable Under Tax Receivable Agreements NonCashTransactionInitialEstablishmentOfAmountsPayableUnderTaxReceivableAgreements	30967000	USD
CY2018	apam	Non Cash Transaction Initial Establishment Of Amounts Payable Under Tax Receivable Agreements NonCashTransactionInitialEstablishmentOfAmountsPayableUnderTaxReceivableAgreements	20303000	USD
CY2020	us-gaap	Transfer To Investments TransferToInvestments	1469000	USD
CY2019	us-gaap	Transfer To Investments TransferToInvestments	946000	USD
CY2018	us-gaap	Transfer To Investments TransferToInvestments	11381000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3425000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4162000	USD
CY2018	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	10255000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	10649000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	10694000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	35484000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	18593000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	20731000	USD
CY2020	us-gaap	Basis Of Accounting BasisOfAccounting	<div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:120%">Basis of presentation</span></div><div style="margin-bottom:6pt;margin-top:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:120%">The accompanying consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and related rules and regulations of the SEC. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates or assumptions that affect the reported amounts and disclosures in the financial statements. Actual results could differ from these estimates or assumptions.</span></div>
CY2020	us-gaap	Variable Interest Entity Ownership Percentage VariableInterestEntityOwnershipPercentage	0.10
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2020	us-gaap	Other Selling And Marketing Expense OtherSellingAndMarketingExpense	2397000	USD
CY2019	us-gaap	Other Selling And Marketing Expense OtherSellingAndMarketingExpense	2650000	USD
CY2018	us-gaap	Other Selling And Marketing Expense OtherSellingAndMarketingExpense	2737000	USD
CY2020	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	24312000	USD
CY2019	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	23170000	USD
CY2018	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	26561000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	4200000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	3300000	USD
CY2020Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	0	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	7543000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2807000	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	849000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	16335000	USD
CY2020Q4	us-gaap	Investments Investments	3656000	USD
CY2019Q4	us-gaap	Investments Investments	23878000	USD
CY2020	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	700000	USD
CY2019	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	5000000.0	USD
CY2018	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	700000	USD
CY2020Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	200000000	USD
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	10300000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	10500000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	10600000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	90000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	60000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	50000000	USD
CY2020Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	200000000	USD
CY2020Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	59000000.0	USD
CY2019Q1	apam	Amounts Reclassifiedto Investment Securities Upon Deconsolidation AmountsReclassifiedtoInvestmentSecuritiesUponDeconsolidation	1500000	USD
CY2020Q4	apam	Net Assetsof Consolidated Investment Products Measuredat Fair Value NetAssetsofConsolidatedInvestmentProductsMeasuredatFairValue	222471000	USD
CY2019Q4	apam	Net Assetsof Consolidated Investment Products Measuredat Fair Value NetAssetsofConsolidatedInvestmentProductsMeasuredatFairValue	105555000	USD
CY2020Q4	apam	Net Assetsof Consolidated Investment Products Carrying Value NetAssetsofConsolidatedInvestmentProductsCarryingValue	-69763000	USD
CY2019Q4	apam	Net Assetsof Consolidated Investment Products Carrying Value NetAssetsofConsolidatedInvestmentProductsCarryingValue	-28509000	USD
CY2020Q4	apam	Net Assetsof Consolidated Investment Products NetAssetsofConsolidatedInvestmentProducts	152708000	USD
CY2019Q4	apam	Net Assetsof Consolidated Investment Products NetAssetsofConsolidatedInvestmentProducts	77046000	USD
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	93753000	USD
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	43110000	USD
CY2020Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	58955000	USD
CY2019Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	33936000	USD
CY2020	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	24233	shares
CY2020	apam	Cumulative Impactof Changesin Ownership CumulativeImpactofChangesinOwnership	0	USD
CY2019	apam	Cumulative Impactof Changesin Ownership CumulativeImpactofChangesinOwnership	0	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	75569845	shares
CY2018	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	77442	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	76942872	shares
CY2019	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	82729	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	77801854	shares
CY2020	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	24233	shares
CY2020	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	126971	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	78572110	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	304570	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	297891	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber	246581	shares
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	899567000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	798952000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	828635000	USD
CY2020Q4	us-gaap	Receivables From Customers ReceivablesFromCustomers	97671000	USD
CY2019Q4	us-gaap	Receivables From Customers ReceivablesFromCustomers	79704000	USD
CY2020Q4	us-gaap	Other Receivables OtherReceivables	2217000	USD
CY2019Q4	us-gaap	Other Receivables OtherReceivables	2164000	USD
CY2020Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	99888000	USD
CY2019Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	81868000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	0	USD
CY2020	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	399325000	USD
CY2019	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	358339000	USD
CY2018	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	360287000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	36493000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	42117000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	52879000	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	435818000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	400456000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	413166000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	4634924	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	21000000.0	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	15900000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	25800000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4500000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2100000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	24116000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	13609000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	18247000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	8174000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6315000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3993000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	515000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	529000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	495000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	32805000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	20453000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	22735000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	27110000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	22310000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	22218000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	880000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-14954000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2645000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	27990000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7356000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	24863000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	60795000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27809000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	47598000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.031
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.028
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.021
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.011
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.007
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.004
CY2020	apam	Tax Rate Reconciliation Rate Benefit From Flow Through Entity Percent TaxRateReconciliationRateBenefitFromFlowThroughEntityPercent	-0.055
CY2019	apam	Tax Rate Reconciliation Rate Benefit From Flow Through Entity Percent TaxRateReconciliationRateBenefitFromFlowThroughEntityPercent	-0.067
CY2018	apam	Tax Rate Reconciliation Rate Benefit From Flow Through Entity Percent TaxRateReconciliationRateBenefitFromFlowThroughEntityPercent	-0.067
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies State And Local EffectiveIncomeTaxRateReconciliationTaxContingenciesStateAndLocal	-0.011
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies State And Local EffectiveIncomeTaxRateReconciliationTaxContingenciesStateAndLocal	-0.068
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies State And Local EffectiveIncomeTaxRateReconciliationTaxContingenciesStateAndLocal	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Other EffectiveIncomeTaxRateReconciliationTaxContingenciesOther	0.002
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Other EffectiveIncomeTaxRateReconciliationTaxContingenciesOther	0.006
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies Other EffectiveIncomeTaxRateReconciliationTaxContingenciesOther	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.165
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.103
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.158
CY2020	apam	Approximate Percentage Of Earnings Not Subject To Income Taxes ApproximatePercentageOfEarningsNotSubjectToIncomeTaxes	0.24
CY2019	apam	Approximate Percentage Of Earnings Not Subject To Income Taxes ApproximatePercentageOfEarningsNotSubjectToIncomeTaxes	0.31
CY2018	apam	Approximate Percentage Of Earnings Not Subject To Income Taxes ApproximatePercentageOfEarningsNotSubjectToIncomeTaxes	0.33
CY2020	apam	Tax Receivable Agreement Percentage Savings Required To Be Paid To Shareholders TaxReceivableAgreementPercentageSavingsRequiredToBePaidToShareholders	0.85
CY2020	apam	Tax Receivable Agreement Percentage Savings Required To Be Paid To Shareholders TaxReceivableAgreementPercentageSavingsRequiredToBePaidToShareholders	0.85
CY2020	apam	Tax Receivable Agreement Percentage To Be Retained By Entity TaxReceivableAgreementPercentageToBeRetainedByEntity	0.15
CY2020	apam	Tax Receivable Agreement Payment Period TaxReceivableAgreementPaymentPeriod	P125D
CY2018Q4	apam	Deferred Tax Assets Step Up Of Tax Basis DeferredTaxAssetsStepUpOfTaxBasis	404715000	USD
CY2018Q4	apam	Amounts Payable Under Tax Receivable Agreement AmountsPayableUnderTaxReceivableAgreement	369355000	USD
CY2019	apam	Deferred Tax Assets Exchanges DeferredTaxAssetsExchanges	13424000	USD
CY2019	apam	Noncash Transaction Initial Establishmentof Amounts Payable Under Tax Receivable Agreements Excluding Impactof Changein Ownership NoncashTransactionInitialEstablishmentofAmountsPayableUnderTaxReceivableAgreementsExcludingImpactofChangeinOwnership	11410000	USD
CY2019	apam	Amortizationof Tradta AmortizationofTRADTA	31872000	USD
CY2019	apam	Tax Receivable Agreement Payments TaxReceivableAgreementPayments	24998000	USD
CY2019	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	21873000	USD
CY2019	apam	Net Gain Loss On The Tax Receivable Agreements Other NetGainLossOnTheTaxReceivableAgreementsOther	19557000	USD
CY2019Q4	apam	Deferred Tax Assets Step Up Of Tax Basis DeferredTaxAssetsStepUpOfTaxBasis	408140000	USD
CY2019Q4	apam	Amounts Payable Under Tax Receivable Agreement AmountsPayableUnderTaxReceivableAgreement	375324000	USD
CY2020	apam	Deferred Tax Assets Exchanges DeferredTaxAssetsExchanges	48474000	USD
CY2020	apam	Noncash Transaction Initial Establishmentof Amounts Payable Under Tax Receivable Agreements Excluding Impactof Changein Ownership NoncashTransactionInitialEstablishmentofAmountsPayableUnderTaxReceivableAgreementsExcludingImpactofChangeinOwnership	41203000	USD
CY2020	apam	Amortizationof Tradta AmortizationofTRADTA	34686000	USD
CY2020	apam	Tax Receivable Agreement Payments TaxReceivableAgreementPayments	26943000	USD
CY2020	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	3602000	USD
CY2020	apam	Net Gain Loss On The Tax Receivable Agreements Other NetGainLossOnTheTaxReceivableAgreementsOther	4673000	USD
CY2020Q4	apam	Deferred Tax Assets Step Up Of Tax Basis DeferredTaxAssetsStepUpOfTaxBasis	446954000	USD
CY2020Q4	apam	Amounts Payable Under Tax Receivable Agreement AmountsPayableUnderTaxReceivableAgreement	412468000	USD
CY2020	us-gaap	Interest Paid InterestPaid	60000	USD
CY2019	us-gaap	Interest Paid InterestPaid	78000	USD
CY2020	us-gaap	Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability	3700000	USD
CY2019	us-gaap	Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability	17200000	USD
CY2020Q4	apam	Deferred Tax Assets Step Up Of Tax Basis DeferredTaxAssetsStepUpOfTaxBasis	446954000	USD
CY2019Q4	apam	Deferred Tax Assets Step Up Of Tax Basis DeferredTaxAssetsStepUpOfTaxBasis	408140000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	35107000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	27757000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	482061000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	435897000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	482061000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	435897000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1667000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1187000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1667000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	613000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	216000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2020	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-1372000	USD
CY2019	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	0	USD
CY2018	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1085000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1667000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	700000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	1600000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	200000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	300000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	212617000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	156536000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	158309000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.65
CY2020	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	23268000	USD
CY2019	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	21154000	USD
CY2018	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	19447000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	189349000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	135382000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	138862000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	55633529	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51127929	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48862435	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	4393	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	55637922	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51127929	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48862435	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.40
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.84
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.40
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.65
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.84
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	23198801	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	26854166	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	28165335	shares
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	7800000	USD
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	7200000	USD
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	6900000	USD
CY2020	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	1600000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	35874000	USD
CY2019	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	900000	USD
CY2018	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	500000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	73450000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	71116000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	37576000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	31621000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	39495000	USD
CY2020	us-gaap	Depreciation Depreciation	6500000	USD
CY2019	us-gaap	Depreciation Depreciation	6800000	USD
CY2018	us-gaap	Depreciation Depreciation	5600000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	343000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	369000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	281000	USD
CY2019	us-gaap	Sublease Income SubleaseIncome	305000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	15841000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	16956000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	13900000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	16749000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	15375000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	13800000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	13495000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	13450000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	37026000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	109895000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	17224000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	92671000	USD
CY2019Q4	apam	Lessee Operating Lease Lease Not Yet Commenced Option To Extend Value LesseeOperatingLeaseLeaseNotYetCommencedOptionToExtendValue	0	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.046
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.047
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y4M24D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y1M6D
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	16546000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	14183000	USD
CY2020Q4	us-gaap	Accounts Receivable Related Parties AccountsReceivableRelatedParties	2000000.0	USD
CY2019Q4	us-gaap	Accounts Receivable Related Parties AccountsReceivableRelatedParties	900000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	899567000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	798952000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	828635000	USD
CY2020Q4	us-gaap	Noncurrent Assets NoncurrentAssets	115178000	USD
CY2019Q4	us-gaap	Noncurrent Assets NoncurrentAssets	126650000	USD

Files In Submission

Name	View Source	Status
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0001517302-21-000019-index.html	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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report.css	Edgar Link	pending
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2019 Q4 Form 10-K Financial Statement

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$APAM Artisan Partners Asset Management Inc. Stock $apam

2019 Q4 Form 10-K Financial Statement

#000151730221000019 Filed on February 23, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$APAM
Artisan Partners Asset Management Inc. Stock $apam