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Boston Trust Equity Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Boston Trust Equity Fund
Objective [Heading] rr_ObjectiveHeading Investment Goals
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Boston Trust Equity Fund seeks long-term capital growth through an actively managed portfolio of stocks.
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 the Boston Trust Equity 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 Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
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, affect the Fund's performance. For the fiscal year ended December 31, 2022, the Fund's portfolio turnover rate was 10.30% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 10.30%
Expense Example [Heading] rr_ExpenseExampleHeading Example:
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The 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 a $10,000 investment, a 5% annual return, redemption at the end of each period and that the Fund's operating expenses remain the same.

Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund invests, under normal circumstances, at least 80% of its assets in a diversified portfolio of domestic equity securities, such as common stock. The Fund may invest in companies of any size, but generally focuses on large capitalization companies. "Assets" means net assets, plus the amount of borrowing for investment purposes. Shareholders will be given 60 days' advance notice of any change to this policy.

ESG Integration: As part of the investment decision making process for the Fund, Boston Trust Walden Inc. (the "Adviser") evaluates how financially material environmental, social, and governance (ESG) factors may affect a company's revenues, expenses, assets, liabilities, and overall risk. The consideration of ESG factors in investment decision-making is referred to as "ESG integration." The Adviser considers "financial materiality" as it is understood in generally accepted accounting principles — information that would influence the judgment of an informed investor. In addition, the Adviser utilizes active ownership strategies to encourage sustainable business policies and practices (e.g., effective climate risk management) and greater ESG transparency (e.g., increased disclosure of salient ESG risks and opportunities). Active ownership strategies include communicating directly with company management teams or boards; filing proposals for vote at company annual general meetings; voting on ballot items in company proxy statements; and engaging public policymakers. Unlike other funds managed by the Adviser, the Fund is not subject to ESG screening criteria.
Risk [Heading] rr_RiskHeading Principal Investment Risks
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The bar chart and performance table below illustrate the variability of the returns of the Fund, which provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns over time compare with those of a broad measure of market performance. The Fund's past performance is not an indication of how the Fund will perform in the future. Updated performance information is available at no cost by visiting www.bostontrustwalden.com or by calling 1-800-282-8782, extension 7050.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate the variability of the returns of the Fund, which provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns over time compare with those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-800-282-8782, extension 7050
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.bostontrustwalden.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance is not an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Average Total Returns (Years ended December 31)
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best quarter:  

Worst quarter:

  
2Q2020   1Q2020  
15.69%   (20.00)%  

For the period January 1, 2023 through March 31, 2023,the aggregate (non-annualized) total return for the Fund was 4.80%.
Year to Date Return, Label rr_YearToDateReturnLabel total return for the Fund
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Mar. 31, 2023
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 4.80%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 15.69%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (20.00%)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest historical individual federal marginal income tax rate 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 a shareholder's tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-deferred arrangements, such as 401(k) plans or individual retirement accounts ("IRA").
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the highest historical individual federal marginal income tax rate and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder's tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-deferred arrangements, such as 401(k) plans or individual retirement accounts ("IRA").
Average Annual Return, Caption rr_AverageAnnualReturnCaption Average Annual Total Returns(as of December 31, 2022)
Boston Trust Equity Fund | Risk Not Insured [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Investments in the Fund are not deposits of the Adviser or Boston Trust Walden Company and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Boston Trust Equity Fund | Risk Lose Money [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock You could lose money on your investment in the Fund, or the Fund could underperform other investments.
Boston Trust Equity Fund | Market Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Market Risk: Market risk refers to the risk related to investments in securities in general and the daily fluctuations in the securities markets.
Boston Trust Equity Fund | Equity Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Equity Risk: The value of the equity securities held by the Fund, and thus the value of the Fund's shares, can fluctuate — at times dramatically.
Boston Trust Equity Fund | Small and Mid Cap Company Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Small and Mid Cap Company Risk: These companies may be subject to greater market risks and fluctuations in value than large capitalization companies and may not correspond to changes in the stock market in general.
Boston Trust Equity Fund | Management Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Management Risk: The Adviser's judgments about the attractiveness, value and potential appreciation of a particular asset class or individual security in which the Fund invests may prove to be incorrect and there is no guarantee that the Adviser's judgment will produce the desired results.
Boston Trust Equity Fund | ESG Integration/Active Ownership Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock ESG Integration/Active Ownership Risk: The Adviser's integration of ESG factors and/or active ownership activities may cause the Fund to perform differently from a fund that uses a different methodology. ESG integration may cause the Fund to forego investment opportunities that may otherwise be advantageous in the short term. The Adviser votes proxies in a manner it believes is consistent with the Fund's ESG criteria. Such votes may not always be consistent with maximizing short-term performance of the issuer.
Boston Trust Equity Fund | Issuer Cybersecurity Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Issuer Cybersecurity Risk: Issuers of securities in which the Fund invests, counterparties with which the Fund engages in transactions, exchange and other financial market operators, banks, brokers, dealers, and other financial institutions may experience cybersecurity breaches. These breaches may result in harmful disruptions to their operations and may negatively impact the financial condition for the municipal issuer, counterparty, or other market participant.
Boston Trust Equity Fund | S&P 500® Index (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (18.11%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 9.42%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 12.56%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 9.28%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Oct. 01, 2003
Boston Trust Equity Fund | Boston Trust Equity Fund  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (load) Imposed on Purchases rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (load) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption none
Management Fee rr_ManagementFeesOverAssets 0.75%
Distribution (Rule 12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.11%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.86%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 88
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 274
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 477
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,061
Annual Return 2013 rr_AnnualReturn2013 28.19%
Annual Return 2014 rr_AnnualReturn2014 9.38%
Annual Return 2015 rr_AnnualReturn2015 (1.33%)
Annual Return 2016 rr_AnnualReturn2016 12.01%
Annual Return 2017 rr_AnnualReturn2017 20.67%
Annual Return 2018 rr_AnnualReturn2018 (2.55%)
Annual Return 2019 rr_AnnualReturn2019 31.74%
Annual Return 2020 rr_AnnualReturn2020 14.53%
Annual Return 2021 rr_AnnualReturn2021 29.77%
Annual Return 2022 rr_AnnualReturn2022 (14.16%)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (14.16%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 10.37%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 11.84%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 9.09%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Oct. 01, 2003
Boston Trust Equity Fund | Boston Trust Equity Fund | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (14.77%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 9.79%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 11.03%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 8.55%
Boston Trust Equity Fund | Boston Trust Equity Fund | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (7.92%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 8.21%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 9.65%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 7.68%