3.24.2.u1 html 169 199 1 false 47 0 false 5 false false R1.htm 0000001 - Document - Cover Sheet http://www.assetmark.com/role/Cover Cover Cover 1 false false R2.htm 9952151 - Statement - Condensed Consolidated Balance Sheets Sheet http://www.assetmark.com/role/CondensedConsolidatedBalanceSheets Condensed Consolidated Balance Sheets Statements 2 false false R3.htm 9952152 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Sheet http://www.assetmark.com/role/CondensedConsolidatedBalanceSheetsParenthetical Condensed Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 9952153 - Statement - Unaudited Condensed Consolidated Statements of Comprehensive Income Sheet http://www.assetmark.com/role/UnauditedCondensedConsolidatedStatementsofComprehensiveIncome Unaudited Condensed Consolidated Statements of Comprehensive Income Statements 4 false false R5.htm 9952154 - Statement - Unaudited Condensed Consolidated Statements of Stockholders' Equity Sheet http://www.assetmark.com/role/UnauditedCondensedConsolidatedStatementsofStockholdersEquity Unaudited Condensed Consolidated Statements of Stockholders' Equity Statements 5 false false R6.htm 9952155 - Statement - Unaudited Condensed Consolidated Statements of Cash Flows Sheet http://www.assetmark.com/role/UnauditedCondensedConsolidatedStatementsofCashFlows Unaudited Condensed Consolidated Statements of Cash Flows Statements 6 false false R7.htm 9952156 - Disclosure - Overview Sheet http://www.assetmark.com/role/Overview Overview Notes 7 false false R8.htm 9952157 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.assetmark.com/role/SummaryofSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 8 false false R9.htm 9952158 - Disclosure - Prepaid Expenses and Other Current Assets Sheet http://www.assetmark.com/role/PrepaidExpensesandOtherCurrentAssets Prepaid Expenses and Other Current Assets Notes 9 false false R10.htm 9952159 - Disclosure - Asset Purchase Sheet http://www.assetmark.com/role/AssetPurchase Asset Purchase Notes 10 false false R11.htm 9952160 - Disclosure - Goodwill and Other Intangible Assets Sheet http://www.assetmark.com/role/GoodwillandOtherIntangibleAssets Goodwill and Other Intangible Assets Notes 11 false false R12.htm 9952161 - Disclosure - Accrued Liabilities and Other Current Liabilities Sheet http://www.assetmark.com/role/AccruedLiabilitiesandOtherCurrentLiabilities Accrued Liabilities and Other Current Liabilities Notes 12 false false R13.htm 9952162 - Disclosure - Other Long-Term Liabilities Sheet http://www.assetmark.com/role/OtherLongTermLiabilities Other Long-Term Liabilities Notes 13 false false R14.htm 9952163 - Disclosure - Fair Value Measurements Sheet http://www.assetmark.com/role/FairValueMeasurements Fair Value Measurements Notes 14 false false R15.htm 9952164 - Disclosure - Asset-Based Expenses Sheet http://www.assetmark.com/role/AssetBasedExpenses Asset-Based Expenses Notes 15 false false R16.htm 9952165 - Disclosure - Debt Sheet http://www.assetmark.com/role/Debt Debt Notes 16 false false R17.htm 9952166 - Disclosure - Share-Based Compensation Sheet http://www.assetmark.com/role/ShareBasedCompensation Share-Based Compensation Notes 17 false false R18.htm 9952167 - Disclosure - Commitments and Contingencies Sheet http://www.assetmark.com/role/CommitmentsandContingencies Commitments and Contingencies Notes 18 false false R19.htm 9952168 - Disclosure - Income Taxes Sheet http://www.assetmark.com/role/IncomeTaxes Income Taxes Notes 19 false false R20.htm 9952169 - Disclosure - Related Party Transactions Sheet http://www.assetmark.com/role/RelatedPartyTransactions Related Party Transactions Notes 20 false false R21.htm 9952170 - Disclosure - Net Income Per Share Attributable to Common Stockholders Sheet http://www.assetmark.com/role/NetIncomePerShareAttributabletoCommonStockholders Net Income Per Share Attributable to Common Stockholders Notes 21 false false R22.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 22 false false R23.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 23 false false R24.htm 9954471 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.assetmark.com/role/SummaryofSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.assetmark.com/role/SummaryofSignificantAccountingPolicies 24 false false R25.htm 9954472 - Disclosure - Prepaid Expenses and Other Current Assets (Tables) Sheet http://www.assetmark.com/role/PrepaidExpensesandOtherCurrentAssetsTables Prepaid Expenses and Other Current Assets (Tables) Tables http://www.assetmark.com/role/PrepaidExpensesandOtherCurrentAssets 25 false false R26.htm 9954473 - Disclosure - Goodwill and Other Intangible Assets (Tables) Sheet http://www.assetmark.com/role/GoodwillandOtherIntangibleAssetsTables Goodwill and Other Intangible Assets (Tables) Tables http://www.assetmark.com/role/GoodwillandOtherIntangibleAssets 26 false false R27.htm 9954474 - Disclosure - Accrued Liabilities and Other Current Liabilities (Tables) Sheet http://www.assetmark.com/role/AccruedLiabilitiesandOtherCurrentLiabilitiesTables Accrued Liabilities and Other Current Liabilities (Tables) Tables http://www.assetmark.com/role/AccruedLiabilitiesandOtherCurrentLiabilities 27 false false R28.htm 9954475 - Disclosure - Other Long-Term Liabilities (Tables) Sheet http://www.assetmark.com/role/OtherLongTermLiabilitiesTables Other Long-Term Liabilities (Tables) Tables http://www.assetmark.com/role/OtherLongTermLiabilities 28 false false R29.htm 9954476 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.assetmark.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.assetmark.com/role/FairValueMeasurements 29 false false R30.htm 9954477 - Disclosure - Asset-Based Expenses (Tables) Sheet http://www.assetmark.com/role/AssetBasedExpensesTables Asset-Based Expenses (Tables) Tables http://www.assetmark.com/role/AssetBasedExpenses 30 false false R31.htm 9954478 - Disclosure - Net Income Per Share Attributable to Common Stockholders (Tables) Sheet http://www.assetmark.com/role/NetIncomePerShareAttributabletoCommonStockholdersTables Net Income Per Share Attributable to Common Stockholders (Tables) Tables http://www.assetmark.com/role/NetIncomePerShareAttributabletoCommonStockholders 31 false false R32.htm 9954479 - Disclosure - Overview (Details) Sheet http://www.assetmark.com/role/OverviewDetails Overview (Details) Details http://www.assetmark.com/role/Overview 32 false false R33.htm 9954480 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) Sheet http://www.assetmark.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails Summary of Significant Accounting Policies - Additional Information (Details) Details 33 false false R34.htm 9954481 - Disclosure - Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expense and Other Current Assets (Details) Sheet http://www.assetmark.com/role/PrepaidExpensesandOtherCurrentAssetsScheduleofPrepaidExpenseandOtherCurrentAssetsDetails Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expense and Other Current Assets (Details) Details 34 false false R35.htm 9954482 - Disclosure - Goodwill and Other Intangible Assets - Additional Information (Details) Sheet http://www.assetmark.com/role/GoodwillandOtherIntangibleAssetsAdditionalInformationDetails Goodwill and Other Intangible Assets - Additional Information (Details) Details 35 false false R36.htm 9954483 - Disclosure - Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details) Sheet http://www.assetmark.com/role/GoodwillandOtherIntangibleAssetsSummaryofIntangibleAssetsDetails Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details) Details 36 false false R37.htm 9954484 - Disclosure - Goodwill and Other Intangible Assets - Summary of Estimated Amortization Expense for Definite-Lived Intangible Assets (Details) Sheet http://www.assetmark.com/role/GoodwillandOtherIntangibleAssetsSummaryofEstimatedAmortizationExpenseforDefiniteLivedIntangibleAssetsDetails Goodwill and Other Intangible Assets - Summary of Estimated Amortization Expense for Definite-Lived Intangible Assets (Details) Details 37 false false R38.htm 9954485 - Disclosure - Accrued Liabilities and Other Current Liabilities - Schedule of Accrued Liabilities and Other Current Liabilities (Details) Sheet http://www.assetmark.com/role/AccruedLiabilitiesandOtherCurrentLiabilitiesScheduleofAccruedLiabilitiesandOtherCurrentLiabilitiesDetails Accrued Liabilities and Other Current Liabilities - Schedule of Accrued Liabilities and Other Current Liabilities (Details) Details 38 false false R39.htm 9954486 - Disclosure - Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Details) Sheet http://www.assetmark.com/role/OtherLongTermLiabilitiesScheduleofOtherLongTermLiabilitiesDetails Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Details) Details 39 false false R40.htm 9954487 - Disclosure - Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Details) Sheet http://www.assetmark.com/role/FairValueMeasurementsScheduleofFinancialAssetsandLiabilitiesMeasuredatFairValueDetails Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Details) Details 40 false false R41.htm 9954488 - Disclosure - Asset-Based Expenses - Schedule of Asset-Based Expenses (Details) Sheet http://www.assetmark.com/role/AssetBasedExpensesScheduleofAssetBasedExpensesDetails Asset-Based Expenses - Schedule of Asset-Based Expenses (Details) Details 41 false false R42.htm 9954489 - Disclosure - Debt - Additional Information (Details) Sheet http://www.assetmark.com/role/DebtAdditionalInformationDetails Debt - Additional Information (Details) Details 42 false false R43.htm 9954490 - Disclosure - Share-Based Compensation - Additional Information (Details) Sheet http://www.assetmark.com/role/ShareBasedCompensationAdditionalInformationDetails Share-Based Compensation - Additional Information (Details) Details 43 false false R44.htm 9954491 - Disclosure - Commitments and Contingencies (Details) Sheet http://www.assetmark.com/role/CommitmentsandContingenciesDetails Commitments and Contingencies (Details) Details http://www.assetmark.com/role/CommitmentsandContingencies 44 false false R45.htm 9954492 - Disclosure - Income Taxes - Additional Information (Details) Sheet http://www.assetmark.com/role/IncomeTaxesAdditionalInformationDetails Income Taxes - Additional Information (Details) Details 45 false false R46.htm 9954493 - Disclosure - Related Party Transactions - Additional Information (Details) Sheet http://www.assetmark.com/role/RelatedPartyTransactionsAdditionalInformationDetails Related Party Transactions - Additional Information (Details) Details 46 false false R47.htm 9954494 - Disclosure - Net Income Per Share Attributable to Common Stockholders - Schedule of Reconciliation of Numerators and Denominators Used in Computing Basic and Diluted Net Income Per Share (Details) Sheet http://www.assetmark.com/role/NetIncomePerShareAttributabletoCommonStockholdersScheduleofReconciliationofNumeratorsandDenominatorsUsedinComputingBasicandDilutedNetIncomePerShareDetails Net Income Per Share Attributable to Common Stockholders - Schedule of Reconciliation of Numerators and Denominators Used in Computing Basic and Diluted Net Income Per Share (Details) Details 47 false false R48.htm 9954495 - Disclosure - Net Income Per Share Attributable to Common Stockholders - Schedule of Anti-dilutive Securities Were Not Included in Computation of Diluted Shares Outstanding (Details) Sheet http://www.assetmark.com/role/NetIncomePerShareAttributabletoCommonStockholdersScheduleofAntidilutiveSecuritiesWereNotIncludedinComputationofDilutedSharesOutstandingDetails Net Income Per Share Attributable to Common Stockholders - Schedule of Anti-dilutive Securities Were Not Included in Computation of Diluted Shares Outstanding (Details) Details 48 false false All Reports Book All Reports amk-20240630.htm amk-20240630.xsd amk-20240630_cal.xml amk-20240630_def.xml amk-20240630_lab.xml amk-20240630_pre.xml http://fasb.org/us-gaap/2024 http://xbrl.sec.gov/dei/2024 http://xbrl.sec.gov/ecd/2024 true true