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MATTHEWS CHINA SMALL COMPANIES FUND  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Matthews China Small Companies Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
Long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of this Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption SHAREHOLDER FEES (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination April 30, 2024
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading PORTFOLIO TURNOVER
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the 
example of fund expenses, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 59% of the average value of its portfolio. 
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 59.00%
Expense Example [Heading] rr_ExpenseExampleHeading EXAMPLE OF FUND EXPENSES
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The example reflects the expense limitation for the one year period only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategy
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal circumstances, the Matthews China Small Companies Fund seeks to achieve its investment objective by investing at least 80% of its net assets, which include borrowings for investment purposes, in the common and preferred stocks of Small Companies (defined below) located in China. China includes its administrative and other districts, such as Hong Kong. A company or other issuer is considered to be “located” in a country or a region, and a security or instrument is deemed to be an Asian (or specific country) security or instrument, if it has substantial ties to that country or region. Matthews currently makes that determination based primarily on one or more of the following criteria: (A) with respect to a company or issuer, whether (i) it is organized under the laws of that country or any country in that region; (ii) it derives at least 50% of its revenues or profits from goods produced or sold, investments made, or services performed, or has at least 50% of its assets located, within that country or region; (iii) it has the primary trading markets for its securities in that country or region; (iv) it has its principal place of business in or is otherwise headquartered in that country or region; or (v) it is a governmental entity or an agency, instrumentality or a political subdivision of that country or any country in that region; and (B) with respect to an instrument or issue, whether (i) its issuer is headquartered or organized in that country or region; (ii) it is issued to finance a project that has at least 50% of its assets or operations in that country or region; (iii) it is at least 50% secured or backed by assets located in that country or region; (iv) it is a component of or its issuer is included in the MSCI China Small Cap Index, the Fund’s primary benchmark index; or (v) it is denominated in the currency of an Asian country and addresses at least one of the other above criteria. The term “located” and the associated criteria listed above have been defined in such a way that Matthews has latitude in determining whether an issuer should be included within a region or country. The Fund may also invest in depositary receipts, including American, European and Global Depositary Receipts.
The Fund seeks to invest in smaller companies capable of sustainable growth based on the fundamental characteristics of those companies, including balance sheet information; number of employees; size and stability of cash flow; management’s depth, adaptability and integrity; product lines; marketing strategies; corporate governance; and financial health. Matthews generally determines whether a company should be considered to be a small company based on its market capitalization (the number of the company’s shares outstanding times the market price per share for such securities). Under normal circumstances, the Fund invests at least 80% of its net assets in any company that has a market capitalization no higher than the greater of $5 billion or the market capitalization of the largest company included in the Fund’s primary benchmark index (each, a “Small Company” and together, “Small Companies”). The largest company in the Fund’s primary benchmark, the MSCI China Small Cap Index, had a market capitalization of $4.63 billion on December 31, 2022. Companies in which the Fund invests typically operate in growth industries and possess the potential to expand their scope of business over time. A company may grow to a market capitalization that is higher than the 
greater of $5 billion or the market capitalization of the largest company included in the Fund’s primary benchmark after the Fund has purchased its securities; nevertheless, the existing holdings of securities of such a company will continue to be considered a Small Company. If additional purchases of a security are made, all holdings (including prior purchases) of that security will be re‑classified with respect to its market capitalization at the time of the last purchase. The implementation of the principal investment strategies of the Fund may result in a significant portion of the Fund’s assets being invested from time to time in one or more sectors, but the Fund may invest in companies in any sector. 
Risk [Heading] rr_RiskHeading Principal Risks of Investment  
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
There is no guarantee that your investment in the Fund will increase in value. The value of your investment in the Fund could go down, meaning you could lose money. The principal risks of investing in the Fund are: 
Political, Social and Economic Risks of Investing in Asia: The value of the Fund’s assets may be adversely affected by political, economic, social and religious instability; inadequate investor protection; changes in laws or regulations of countries within the Asian region (including countries in which the Fund invests, as well as the broader region); international relations with other nations; natural disasters; corruption and military activity. The economies of many Asian countries differ from the economies of more developed countries in many respects, such as rate of growth, inflation, capital reinvestment, resource self-sufficiency, financial system stability, the national balance of payments position and sensitivity to changes in global trade. 
Geopolitical Events Risk: The interconnectivity between global economies and financial markets increases the likelihood that events or conditions in one region or financial market may adversely impact issuers in a different country, region or financial market. Securities in the Fund’s portfolio may underperform due to inflation (or expectations for inflation), interest rates, global demand for particular products or resources, natural disasters, climate change and climate-related events, pandemics, epidemics, terrorism, international conflicts, regulatory events and governmental or quasi-governmental actions. The occurrence of global events similar to those in recent years may result in market volatility and may have long term effects on the global financial markets. 
Currency Risk: When the Fund conducts securities transactions in a foreign currency, there is the risk of the value of the foreign currency increasing or decreasing against the value of the U.S. dollar. The value of an investment denominated in a foreign currency will decline in U.S. dollar terms if that currency weakens against the U.S. dollar. While the Fund is permitted to hedge currency risks, Matthews does not anticipate doing so at this time. Additionally, China may utilize formal or informal currency-exchange controls or “capital controls.” Capital controls may impose restrictions on the Fund’s ability to repatriate investments or income. Such controls may also affect the value of the Fund’s holdings. 
Risks Associated with Emerging Markets: Many Asian countries are considered emerging markets. Such markets are often less stable politically and economically than developed markets such as the United States, and investing in these markets involves different and greater risks. There may be less 
publicly available information about companies in many Asian countries, and the stock exchanges and brokerage industries in many Asian countries typically do not have the level of government oversight as do those in the United States. Securities markets of many Asian countries are also substantially smaller, less liquid and more volatile than securities markets in the United States. Additionally, investors may have substantial difficulties bringing legal actions to enforce or protect investors’ rights, which can increase the risks of loss. 
Risks Associated with Smaller Companies: Smaller companies may offer substantial opportunities for capital growth; they also involve substantial risks, and investments in smaller companies may be considered speculative. Such companies often have limited product lines, markets or financial resources. Smaller companies may be more dependent on one or few key persons and may lack depth of management. Larger portions of their stock may be held by a small number of investors (including founders and management) than is typical of larger companies. Credit may be more difficult to obtain (and on less advantageous terms) than for larger companies. As a result, the influence of creditors (and the impact of financial or operating restrictions associated with debt financing) on smaller companies may be greater than on larger or more established companies. The Fund may have more difficulty obtaining information about smaller companies, making it more difficult to evaluate the impact of market, economic, regulatory and other factors on them. Informational difficulties may also make valuing or disposing of their securities more difficult than it would for larger companies. Securities of smaller companies may trade less frequently and in lesser volume than more widely held securities and the securities of smaller companies generally are subject to more abrupt or erratic price movements than more widely held or larger, more established companies or the market indices in general. The value of securities of smaller companies may react differently to political, market and economic developments than the markets as a whole or than other types of stocks. 
Risks Associated with Medium‑Size Companies: Medium‑size companies may be subject to a number of risks not associated with larger, more established companies, potentially making their stock prices more volatile and increasing the risk of loss. 
Risks Associated with China and Hong Kong: The Chinese government exercises significant control over China’s economy through its industrial policies (e.g., allocation of resources and other preferential treatment), monetary policy, management of currency exchange rates, and management of the payment of foreign currency-denominated obligations. Changes in these policies could adversely impact affected industries or companies in China. China’s economy, particularly its export-oriented industries, may be adversely impacted by trade or political disputes with China’s major trading partners, including the U.S. In addition, as its consumer class continues to grow, China’s domestically oriented industries may be especially sensitive to changes in government policy and investment cycles. As demonstrated by Hong Kong protests in recent years over political, economic, and legal freedoms, and the Chinese government’s response to them, considerable political uncertainty continues to exist within Hong Kong. Due to the interconnected nature of the Hong Kong and Chinese economies, this instability in 
Hong Kong may cause uncertainty in the Hong Kong and Chinese markets. If China were to exert its authority so as to alter the economic, political or legal structures or the existing social policy of Hong Kong, investor and business confidence in Hong Kong could be negatively affected and have an adverse effect on the Fund’s investments. 
Growth Stock Risk: Growth stocks may be more volatile than other stocks because they are more sensitive to investor perceptions of the issuing company’s growth potential. Growth stocks may go in and out of favor over time and may perform differently than the market as a whole. 
Equity Securities Risk: Equity securities may include common stock, preferred stock or other securities representing an ownership interest or the right to acquire an ownership interest in an issuer. Equity risk is the risk that stocks and other equity securities generally fluctuate in value more than bonds and may decline in value over short or extended periods. The value of stocks and other equity securities may be affected by changes in an issuer’s financial condition, factors that affect a particular industry or industries, or as a result of changes in overall market, economic and political conditions that are not specifically related to a company or industry. 
Preferred Stock Risk: Preferred stock normally pays dividends at a specified rate and has precedence over common stock in the event the issuer is liquidated or declares bankruptcy. However, in the event a company is liquidated or declares bankruptcy, the claims of owners of bonds take precedence over the claims of those who own preferred and common stock. If interest rates rise, the dividend on preferred stocks may be less attractive, causing the price of such stocks to decline. 
Depositary Receipts Risk: Although depositary receipts have risks similar to the securities that they represent, they may also involve higher expenses and may trade at a discount (or premium) to the underlying security. In addition, depositary receipts may not pass through voting and other shareholder rights, and may be less liquid than the underlying securities listed on an exchange. 
Volatility Risk: The smaller size and lower levels of liquidity in emerging markets, as well as other factors, may result in changes in the prices of Asian securities that are more volatile than those of companies in more developed regions. This volatility can cause the price of the Fund’s shares to go up or down dramatically. Because of this volatility, this Fund is better suited for long-term investors (typically five years or longer). 
Active Management Risk: The Fund is actively managed by Matthews. There is the risk that Matthews may select securities that underperform the relevant stock market(s), the Fund’s benchmark index or other funds with similar investment objectives and investment strategies. 
Sector Concentration Risk: To the extent that the Fund emphasizes, from time to time, investments in a particular sector, the Fund will be subject to a greater degree to the risks particular to that sector, including the sectors described below. Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect a single sector. By focusing its investments in a particular sector, the Fund may face more risks than if it were diversified broadly over numerous sectors. 
–   Industrial Sector Risk: As of December 31, 2022, 28% of the Fund’s assets were invested in the industrial sector. Industrial companies are affected by supply and demand both for their specific product or service and for industrial sector products in general. Government regulation, world events, exchange rates and economic conditions, technological developments and liabilities for environmental damage and general civil liabilities will likewise affect the performance of these companies. 
Cybersecurity Risk: With the increased use of technologies such as the internet to conduct business, the Fund is susceptible to operational, information security, and related risks. Cyber incidents affecting the Fund or its service providers may cause disruptions and impact business operations, potentially resulting in financial losses, interference with the Fund’s ability to calculate its NAV, impediments to trading, the inability of shareholders to transact business, violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, reimbursement or other compensation costs, or additional compliance costs. 
Risk Lose Money [Text] rr_RiskLoseMoney The value of your investment in the Fund could go down, meaning you could lose money.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Past Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart below shows the Fund’s performance for each full calendar year since its inception and how it has varied from year to year, reflective of the Fund’s volatility and some indication of risk. Also shown are the best and worst quarters for this time period. The table below shows the Fund’s performance over certain periods of time, along with performance of its benchmark index. The information presented below is past performance, before and after taxes, and is not a prediction of future results. Both the bar chart and performance table assume reinvestment of all dividends and distributions. For the Fund’s most recent month‑end performance, please visit matthewsasia.com or call 800.789.ASIA (2742). 
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart below shows the Fund’s performance for each full calendar year since its inception and how it has varied from year to year, reflective of the Fund’s volatility and some indication of risk.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.789.ASIA (2742)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress matthewsasia.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The information presented below is past performance, before and after taxes, and is not a prediction of future results.
Bar Chart [Heading] rr_BarChartHeading INVESTOR CLASS: ANNUAL RETURNS FOR YEARS ENDED 12/31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Best Quarter Q2 2020 42.64% Worst Quarter Q3 2022 -22.26%
Performance Table Heading rr_PerformanceTableHeading AVERAGE ANNUAL TOTAL RETURNS FOR PERIODS ENDED DECEMBER 31, 2022
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After‑tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after‑tax returns depend on an investor’s tax situation and may differ from those shown. After‑tax returns shown are not relevant to investors who hold their Fund shares through tax‑deferred arrangements, such as 401(k) plans or individual retirement accounts.
MATTHEWS CHINA SMALL COMPANIES FUND | Investor Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum Account Fee on Redemptions (for wire redemptions only) rr_MaximumAccountFee $ 9
Management Fees rr_ManagementFeesOverAssets 1.00%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Administration and Shareholder Servicing Fees rr_Component1OtherExpensesOverAssets 0.16%
Other Expenses rr_OtherExpensesOverAssets 0.55%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.55%
Fee Waiver and Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.14%) [1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 1.41%
One year rr_ExpenseExampleYear01 $ 144
Three years rr_ExpenseExampleYear03 476
Five years rr_ExpenseExampleYear05 831
Ten years rr_ExpenseExampleYear10 $ 1.834
2013 rr_AnnualReturn2013 28.85%
2014 rr_AnnualReturn2014 (3.33%)
2015 rr_AnnualReturn2015 4.07%
2016 rr_AnnualReturn2016 (2.35%)
2017 rr_AnnualReturn2017 53.88%
2018 rr_AnnualReturn2018 (17.68%)
2019 rr_AnnualReturn2019 35.41%
2020 rr_AnnualReturn2020 82.52%
2021 rr_AnnualReturn2021 (3.59%)
2022 rr_AnnualReturn2022 (31.26%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 42.64%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2022
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (22.26%)
1 year rr_AverageAnnualReturnYear01 (31.26%)
5 years rr_AverageAnnualReturnYear05 6.16%
10 years rr_AverageAnnualReturnYear10 10.14%
Since Inception rr_AverageAnnualReturnSinceInception 6.38%
Inception Date rr_AverageAnnualReturnInceptionDate May 31, 2011 [2]
MATTHEWS CHINA SMALL COMPANIES FUND | Institutional Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum Account Fee on Redemptions (for wire redemptions only) rr_MaximumAccountFee $ 9
Management Fees rr_ManagementFeesOverAssets 1.00%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Administration and Shareholder Servicing Fees rr_Component1OtherExpensesOverAssets 0.16%
Other Expenses rr_OtherExpensesOverAssets 0.38%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.38%
Fee Waiver and Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.18%) [1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 1.20%
One year rr_ExpenseExampleYear01 $ 122
Three years rr_ExpenseExampleYear03 419
Five years rr_ExpenseExampleYear05 738
Ten years rr_ExpenseExampleYear10 $ 1,642
1 year rr_AverageAnnualReturnYear01 (31.08%)
5 years rr_AverageAnnualReturnYear05 6.40%
10 years rr_AverageAnnualReturnYear10
Since Inception rr_AverageAnnualReturnSinceInception 7.56% [3]
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 30, 2017
MATTHEWS CHINA SMALL COMPANIES FUND | Return after taxes on distributions | Investor Class  
Risk/Return: rr_RiskReturnAbstract  
1 year rr_AverageAnnualReturnYear01 (31.65%) [2]
5 years rr_AverageAnnualReturnYear05 3.66% [2]
10 years rr_AverageAnnualReturnYear10 8.22% [2]
Since Inception rr_AverageAnnualReturnSinceInception 4.77% [2]
Inception Date rr_AverageAnnualReturnInceptionDate May 31, 2011 [2]
MATTHEWS CHINA SMALL COMPANIES FUND | Return after taxes on distributions and sale of Fund shares | Investor Class  
Risk/Return: rr_RiskReturnAbstract  
1 year rr_AverageAnnualReturnYear01 (18.42%) [2]
5 years rr_AverageAnnualReturnYear05 4.47% [2]
10 years rr_AverageAnnualReturnYear10 7.89% [2]
Since Inception rr_AverageAnnualReturnSinceInception 4.78% [2]
Inception Date rr_AverageAnnualReturnInceptionDate May 31, 2011
MATTHEWS CHINA SMALL COMPANIES FUND | MSCI China Small Cap Index (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 year rr_AverageAnnualReturnYear01 (24.77%)
5 years rr_AverageAnnualReturnYear05 (5.10%)
10 years rr_AverageAnnualReturnYear10 1.00%
Since Inception rr_AverageAnnualReturnSinceInception (1.07%) [4]
Inception Date rr_AverageAnnualReturnInceptionDate May 31, 2011
[1]
Matthews has contractually agreed (i) to waive fees and reimburse expenses to the extent needed to limit Total Annual Fund Operating Expenses (excluding Rule 12b‑1 fees, taxes, interest, brokerage commissions, short sale dividend expenses, expenses incurred in connection with any merger or reorganization or extraordinary expenses such as litigation) of the Institutional Class to 1.20%, first by waiving class specific expenses (e.g., shareholder service fees specific to a particular class) of the Institutional Class and then, to the extent necessary, by waiving non‑class specific expenses (e.g., custody fees) of the Institutional Class, and (ii) if any Fund-wide expenses (i.e., expenses that apply to both the Institutional Class and the Investor Class) are waived for the Institutional Class to maintain the 1.20% expense limitation, to waive an equal amount (in annual percentage terms) of those same expenses for the Investor Class. The Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement for the Investor Class may vary from year to year and will in some years exceed 1.20%. If the operating expenses fall below the expense limitation within three years after Matthews has made a waiver or reimbursement, the Fund may reimburse Matthews up to an amount that does not cause the expenses for that year to exceed the lesser of (i) the expense limitation applicable at the time of that fee waiver and/or expense reimbursement or (ii) the expense limitation in effect at the time of recoupment. This agreement will remain in place until April 30, 2024 and may be terminated at any time by the Board of Trustees on behalf of the Fund on 60 days’ written notice to Matthews. Matthews may decline to renew this agreement by written notice to the Trust at least 30 days before its annual expiration date.
[2]
After‑tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after‑tax returns depend on an investor’s tax situation and may differ from those shown. After‑tax returns shown are not relevant to investors who hold their Fund shares through tax‑deferred arrangements, such as 401(k) plans or individual retirement accounts.
[3]
Because the inception date of the Institutional Class is later than that of the Index returns shown, the since-inception performance of the Institutional Class is not directly comparable to the performance of the Index.
[4]
Calculated from 5/31/11.