Shareholder Report | 6 Months Ended | 18 Months Ended | 110 Months Ended |
Jun. 30, 2024 USD ($) Holding | Jun. 30, 2024 USD ($) Holding | Jun. 30, 2024 USD ($) Holding |
Shareholder Report [Line Items] | | | |
Document Type | N-CSRS | | |
Amendment Flag | false | | |
Registrant Name | PARNASSUS FUNDS | | |
Entity Central Index Key | 0000747546 | | |
Entity Investment Company Type | N-1A | | |
Document Period End Date | Jun. 30, 2024 | | |
C000156024 | | | |
Shareholder Report [Line Items] | | | |
Fund Name | Parnassus Value Equity Fund | | |
Class Name | Institutional Shares | | |
Trading Symbol | PFPWX | | |
Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Fund for the period of January 1, 2024 to June 30, 2024. | | |
Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | | |
Additional Information [Text Block] | You can find additional information about the fund at www.parnassus.com | | |
Additional Information Phone Number | 800-999-3505 | | |
Additional Information Website | www.parnassus.com</span>" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.parnassus.com</span> | | |
Expenses [Text Block] | What was the Fund's cost for the period? (based on hypothetical $10,000 investment) Class name Cost of a $10,000 investment Cost paid as a % of a $10,000 investment Institutional Shares $33 0.65% | | |
Expenses Paid, Amount | $ 33 | | |
Expense Ratio, Percent | 0.65% | | |
Factors Affecting Performance [Text Block] | How did the fund perform? Parnassus Value Equity Fund (Institutional Shares) returned -3.74% (net of fees) for the quarter, underperforming the Russell 1000 Value Index. Stock selection in the Health Care sector drove most of the underperformance. Selection in the Consumer Staples and Industrials sectors detracted to a lesser degree. The portfolio's positioning remained steady. The Fund maintained its overweights in Information Technology, Communication Services and Financials. We sold Cisco Systems and bought Broadcom for more attractive networking exposure, while adding to our existing cable positions. We maintained diversification. Our artificial intelligence-related (AI-related) investments in information technology were complemented by holdings that provided exposure to other parts of the economy. | | |
Line Graph [Table Text Block] | Parnassus Value Equity Fund S&P 500 Index Russell 1000 ® 2015 $10,000 $10,000 $10,000 2015 $9,978 $9,947 $9,597 2016 $12,141 $11,137 $11,262 2017 $14,573 $13,569 $12,801 2018 $12,642 $12,974 $11,742 2019 $16,885 $17,059 $14,859 2020 $21,565 $20,197 $15,274 2021 $28,330 $25,995 $19,117 2022 $24,476 $21,287 $17,676 2023 $27,888 $26,883 $19,703 2024 $29,590 $30,994 $21,008 | | |
Average Annual Return [Table Text Block] | 1 Year 5 years Since Inception Parnassus Value Equity Fund - Institutional Shares (Incp: April 30, 2015) 15.38% 14.59% 12.56% S&P 500 Index 24.56% 15.05% 13.13% Russell 1000 ® 13.06% 9.01% 8.43% | | |
Performance Inception Date | | | Apr. 30, 2015 |
AssetsNet | $ 4,902,949,310 | $ 4,902,949,310 | $ 4,902,949,310 |
Holdings Count | Holding | 44 | 44 | 44 |
Advisory Fees Paid, Amount | $ 15,609,747 | | |
InvestmentCompanyPortfolioTurnover | 10% | | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $4,902,949,310 # of Portfolio Holdings 44 Portfolio Turnover Rate 10% Advisory Fees Paid $15,609,747 | | |
Holdings [Text Block] | Sector Allocation (%) Value Value Short-Term Investments, Other Assets & Liabilities 0.5% Utilities 1.5% Consumer Staples 2.9% Real Estate 4.0% Materials 4.4% Consumer Discretionary 4.5% Industrials 9.1% Communication Services 12.2% Health Care 15.9% Information Technology 17.6% Financials 27.4% | | |
Largest Holdings [Text Block] | Top Ten Holdings Verizon Communications Inc. 4.2% Bank of America Corp. 3.5% Oracle Corp. 3.3% S&P Global Inc. 3.0% Alphabet Inc., Class A 3.0% Sysco Corp. 2.9% Ball Corp. 2.8% The Bank of New York Mellon Corp. 2.8% Micron Technology Inc. 2.7% Microsoft Corp. 2.7% | | |
Material Fund Change [Text Block] | Material Fund Changes No material changes to the Fund in the last reporting period. | | |
Updated Prospectus Phone Number | 800-999-3505 | | |
C000240327 | | | |
Shareholder Report [Line Items] | | | |
Fund Name | Parnassus Growth Equity Fund | | |
Class Name | Institutional Shares | | |
Trading Symbol | PFPGX | | |
Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Fund for the period of January 1, 2024 to June 30, 2024. | | |
Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | | |
Additional Information [Text Block] | You can find additional information about the fund at www.parnassus.com | | |
Additional Information Phone Number | 800-999-3505 | | |
Additional Information Website | www.parnassus.com</span>" id="sjs-B45"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.parnassus.com</span> | | |
Expenses [Text Block] | What was the Fund's cost for the period? (based on hypothetical $10,000 investment) Class name Cost of a $10,000 investment Cost paid as a % of a $10,000 investment Institutional Shares $34 0.63% | | |
Expenses Paid, Amount | $ 34 | | |
Expense Ratio, Percent | 0.63% | | |
Factors Affecting Performance [Text Block] | How did the fund perform? The Parnassus Growth Equity Fund (Institutional Shares) returned 3.78% (net of fees) for the quarter, underperforming the Russell 1000 Growth Index. The underperformance was primarily driven by our stock selection in the Information Technology sector. An overweight position and stock selection in the Financials sector also detracted. We took advantage of recent sell-offs to add two new positions in Financials and Information Technology: MSCI and Workday, respectively. We offset these new holdings by trimming our existing positions and selling Palo Alto Networks within Information Technology. | | |
Average Annual Return [Table Text Block] | 1 Year Since Inception Parnassus Growth Equity Fund - Institutional Shares (Incp: December 28, 2022) 32.21% 42.03% S&P 500 Index 24.56% 29.63% Russell 1000 ® 33.48% 45.33% | | |
Performance Inception Date | | Dec. 28, 2022 | |
AssetsNet | $ 49,937,183 | $ 49,937,183 | $ 49,937,183 |
Holdings Count | Holding | 41 | 41 | 41 |
Advisory Fees Paid, Amount | $ 21,511 | | |
InvestmentCompanyPortfolioTurnover | 15% | | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $49,937,183 # of Portfolio Holdings 41 Portfolio Turnover Rate 15% Advisory Fees Paid $21,511 | | |
Holdings [Text Block] | Sector Allocation (%) Value Value Short-Term Investments, Other Assets & Liabilities 2.0% Consumer Staples 1.9% Materials 2.9% Industrials 4.2% Consumer Discretionary 8.7% Financials 10.4% Communication Services 11.0% Health Care 14.7% Information Technology 44.2% | | |
Largest Holdings [Text Block] | Top Ten Holdings Microsoft Corp. 8.4% Alphabet Inc., Class A 8.1% NVIDIA Corp. 7.7% Amazon.com Inc. 4.9% Apple Inc. 4.5% Visa Inc., Class A 4.1% Eli Lilly & Co. 3.4% Salesforce Inc. 3.3% Broadcom Inc. 2.9% Intuit Inc. 2.4% | | |
Material Fund Change [Text Block] | Material Fund Changes No material changes to the Fund in the last reporting period. | | |
Updated Prospectus Phone Number | 800-999-3505 | | |
C000002468 | | | |
Shareholder Report [Line Items] | | | |
Fund Name | Parnassus Mid Cap Fund | | |
Class Name | Investor Shares | | |
Trading Symbol | PARMX | | |
Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Fund for the period of January 1, 2024 to June 30, 2024. | | |
Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | | |
Additional Information [Text Block] | You can find additional information about the fund at www.parnassus.com | | |
Additional Information Phone Number | 800-999-3505 | | |
Additional Information Website | www.parnassus.com</span>" id="sjs-B70"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.parnassus.com</span> | | |
Expenses [Text Block] | What was the Fund's cost for the period? (based on hypothetical $10,000 investment) Class name Cost of a $10,000 investment Cost paid as a % of a $10,000 investment Investor Shares $48 0.96% | | |
Expenses Paid, Amount | $ 48 | | |
Expense Ratio, Percent | 0.96% | | |
Factors Affecting Performance [Text Block] | How did the fund perform? The Parnassus Mid Fund (Investor Shares) returned -5.80% (net of fees) for the quarter, underperforming the Russell Midcap Index. The portfolio's underperformance was primarily driven by stock selection. The Health Care and Industrials sectors were the biggest detractors, due in part to our overweight positioning in life sciences tools and freight transportation stocks. We shifted the portfolio position in the Consumer Staples sector from a modest underweight to a significant underweight during the quarter and increased the overweight position in the Information Technology sector. | | |
Line Graph [Table Text Block] | Parnassus Mid Cap Fund Russell 1000 ® Russell Midcap Index 2013 $10,000 $10,000 $10,000 2014 $10,414 $10,557 $10,418 2015 $10,324 $10,653 $10,164 2016 $11,984 $11,938 $11,567 2017 $13,876 $14,526 $13,708 2018 $12,955 $13,831 $12,467 2019 $16,680 $18,178 $16,274 2020 $19,162 $21,989 $19,057 2021 $22,303 $27,806 $23,361 2022 $17,494 $22,488 $19,316 2023 $19,711 $28,453 $22,644 2024 $20,118 $32,504 $23,768 | | |
Average Annual Return [Table Text Block] | 1 Year 5 years 10 Years Parnassus Mid Cap Fund - Investor Shares 10.06% 4.98% 7.24% Russell 1000 ® 23.88% 14.61% 12.51% Russell Midcap Index 12.88% 9.46% 9.04% | | |
AssetsNet | $ 3,037,798,726 | $ 3,037,798,726 | $ 3,037,798,726 |
Holdings Count | Holding | 40 | 40 | 40 |
Advisory Fees Paid, Amount | $ 12,512,960 | | |
InvestmentCompanyPortfolioTurnover | 33% | | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $3,037,798,726 # of Portfolio Holdings 40 Portfolio Turnover Rate 33% Advisory Fees Paid $12,512,960 | | |
Holdings [Text Block] | Sector Allocation (%) Value Value Short-Term Investments, Other Assets & Liabilities 0.8% Utilities 2.3% Communication Services 2.6% Real Estate 4.1% Materials 6.2% Health Care 9.0% Consumer Discretionary 10.6% Financials 17.3% Industrials 23.1% Information Technology 24.0% | | |
Largest Holdings [Text Block] | Top Ten Holdings Fidelity National Information Services 3.9% Guidewire Software Inc. 3.7% Roper Technologies Inc. 3.6% J.B. Hunt Transport Services Inc. 3.5% Cboe Global Markets Inc. 3.5% KLA Corp. 3.2% TransUnion 3.2% Republic Services Inc., Class A 3.1% Hologic Inc. 3.1% Ross Stores Inc. 2.9% | | |
Material Fund Change [Text Block] | Material Fund Changes No material changes to the Fund in the last reporting period. | | |
Updated Prospectus Phone Number | 800-999-3505 | | |
C000002467 | | | |
Shareholder Report [Line Items] | | | |
Fund Name | Parnassus Mid Cap Growth Fund | | |
Class Name | Investor Shares | | |
Trading Symbol | PARNX | | |
Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Fund for the period of January 1, 2024 to June 30, 2024. | | |
Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | | |
Additional Information [Text Block] | You can find additional information about the fund at www.parnassus.com | | |
Additional Information Phone Number | 800-999-3505 | | |
Additional Information Website | www.parnassus.com</span>" id="sjs-B95"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.parnassus.com</span> | | |
Expenses [Text Block] | What was the Fund's cost for the period? (based on hypothetical $10,000 investment) Class name Cost of a $10,000 investment Cost paid as a % of a $10,000 investment Investor Shares $41 0.80% | | |
Expenses Paid, Amount | $ 41 | | |
Expense Ratio, Percent | 0.80% | | |
Factors Affecting Performance [Text Block] | How did the fund perform? The Parnassus Mid Cap Growth Fund (Investor Shares) returned -3.20% (net of fees) for the second quarter of 2024, approximately in line with the Russell Midcap Growth Index's -3.21% return. Stock selection in the Information Technology and Industrials sectors contributed to relative results, while selection within Real Estate and Health Care detracted. The portfolio position in Consumer Discretionary shifted from an overweight to an underweight during the quarter, while the overweight position in Information Technology increased. | | |
Line Graph [Table Text Block] | Parnassus Mid Cap Growth Fund Russell 1000 ® Russell Midcap Growth Index 2013 $10,000 $10,000 $10,000 2014 $10,609 $10,557 $10,507 2015 $10,637 $10,653 $10,486 2016 $12,068 $11,938 $11,254 2017 $14,008 $14,526 $14,097 2018 $12,645 $13,831 $13,427 2019 $16,416 $18,178 $18,189 2020 $21,112 $21,989 $24,662 2021 $23,090 $27,806 $27,801 2022 $15,350 $22,488 $20,372 2023 $20,815 $28,453 $25,648 2024 $21,729 $32,504 $27,181 | | |
Average Annual Return [Table Text Block] | 1 Year 5 years 10 Years Parnassus Mid Cap Growth Fund - Investor Shares 19.29% 7.43% 8.07% Russell 1000 ® 23.88% 14.61% 12.51% Russell Midcap Growth Index 15.05% 9.93% 10.52% | | |
AssetsNet | $ 831,325,790 | $ 831,325,790 | $ 831,325,790 |
Holdings Count | Holding | 40 | 40 | 40 |
Advisory Fees Paid, Amount | $ 2,519,872 | | |
InvestmentCompanyPortfolioTurnover | 20% | | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $831,325,790 # of Portfolio Holdings 40 Portfolio Turnover Rate 20% Advisory Fees Paid $2,519,872 | | |
Holdings [Text Block] | Sector Allocation (%) Value Value Short-Term Investments, Other Assets & Liabilities 0.5% Communication Services 2.4% Real Estate 3.1% Materials 4.5% Financials 9.1% Consumer Discretionary 13.2% Health Care 15.9% Industrials 17.4% Information Technology 33.9% | | |
Largest Holdings [Text Block] | Top Ten Holdings Guidewire Software Inc. 5.5% Teradyne Inc. 4.9% Equifax Inc. 4.3% Trane Technologies plc 3.6% KLA Corp. 3.6% Agilent Technologies Inc. 3.4% Ross Stores Inc. 3.4% CoStar Group Inc. 3.1% Monolithic Power Systems Inc. 3.0% Mettler-Toledo International Inc. 3.0% | | |
Material Fund Change [Text Block] | Material Fund Changes No material changes to the Fund in the last reporting period. | | |
Updated Prospectus Phone Number | 800-999-3505 | | |
C000002470 | | | |
Shareholder Report [Line Items] | | | |
Fund Name | Parnassus Value Equity Fund | | |
Class Name | Investor Shares | | |
Trading Symbol | PARWX | | |
Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Fund for the period of January 1, 2024 to June 30, 2024. | | |
Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | | |
Additional Information [Text Block] | You can find additional information about the fund at www.parnassus.com | | |
Additional Information Phone Number | 800-999-3505 | | |
Additional Information Website | www.parnassus.com</span>" id="sjs-B120"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.parnassus.com</span> | | |
Expenses [Text Block] | What was the Fund's cost for the period? (based on hypothetical $10,000 investment) Class name Cost of a $10,000 investment Cost paid as a % of a $10,000 investment Investor Shares $45 0.88% | | |
Expenses Paid, Amount | $ 45 | | |
Expense Ratio, Percent | 0.88% | | |
Factors Affecting Performance [Text Block] | How did the fund perform? Parnassus Value Equity Fund (Investor Shares) returned -3.81% (net of fees) for the quarter, underperforming the Russell 1000 Value Index. Stock selection in the Health Care sector drove most of the underperformance. Selection in the Consumer Staples and Industrials sectors detracted to a lesser degree. The portfolio's positioning remained steady. The Fund maintained its overweights in Information Technology, Communication Services and Financials. We sold Cisco Systems and bought Broadcom for more attractive networking exposure, while adding to our existing cable positions. We maintained diversification. Our artificial intelligence-related (AI-related) investments in information technology were complemented by holdings that provided exposure to other parts of the economy. | | |
Line Graph [Table Text Block] | Parnassus Value Equity Fund S&P 500 Index Russell 1000 ® 2013 $10,000 $10,000 $10,000 2014 $10,883 $10,612 $10,478 2015 $11,237 $10,758 $10,077 2016 $13,643 $12,045 $11,824 2017 $16,346 $14,675 $13,440 2018 $14,141 $14,031 $12,329 2019 $18,849 $18,449 $15,601 2020 $24,017 $21,844 $16,037 2021 $31,491 $28,114 $20,072 2022 $27,141 $23,023 $18,559 2023 $30,859 $29,075 $20,686 2024 $32,703 $33,521 $22,057 | | |
Average Annual Return [Table Text Block] | 1 Year 5 years 10 Years Parnassus Value Equity Fund - Investor Shares 15.13% 14.34% 12.58% S&P 500 Index 24.56% 15.05% 12.86% Russell 1000 ® 13.06% 9.01% 8.23% | | |
AssetsNet | $ 4,902,949,310 | $ 4,902,949,310 | $ 4,902,949,310 |
Holdings Count | Holding | 44 | 44 | 44 |
Advisory Fees Paid, Amount | $ 15,609,747 | | |
InvestmentCompanyPortfolioTurnover | 10% | | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $4,902,949,310 # of Portfolio Holdings 44 Portfolio Turnover Rate 10% Advisory Fees Paid $15,609,747 | | |
Holdings [Text Block] | Sector Allocation (%) Value Value Short-Term Investments, Other Assets & Liabilities 0.5% Utilities 1.5% Consumer Staples 2.9% Real Estate 4.0% Materials 4.4% Consumer Discretionary 4.5% Industrials 9.1% Communication Services 12.2% Health Care 15.9% Information Technology 17.6% Financials 27.4% | | |
Largest Holdings [Text Block] | Top Ten Holdings Verizon Communications Inc. 4.2% Bank of America Corp. 3.5% Oracle Corp. 3.3% S&P Global Inc. 3.0% Alphabet Inc., Class A 3.0% Sysco Corp. 2.9% Ball Corp. 2.8% The Bank of New York Mellon Corp. 2.8% Micron Technology Inc. 2.7% Microsoft Corp. 2.7% | | |
Material Fund Change [Text Block] | Material Fund Changes No material changes to the Fund in the last reporting period. | | |
Updated Prospectus Phone Number | 800-999-3505 | | |
C000156023 | | | |
Shareholder Report [Line Items] | | | |
Fund Name | Parnassus Mid Cap Fund | | |
Class Name | Institutional Shares | | |
Trading Symbol | PFPMX | | |
Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Fund for the period of January 1, 2024 to June 30, 2024. | | |
Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | | |
Additional Information [Text Block] | You can find additional information about the fund at www.parnassus.com | | |
Additional Information Phone Number | 800-999-3505 | | |
Additional Information Website | www.parnassus.com</span>" id="sjs-B145"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.parnassus.com</span> | | |
Expenses [Text Block] | What was the Fund's cost for the period? (based on hypothetical $10,000 investment) Class name Cost of a $10,000 investment Cost paid as a % of a $10,000 investment Institutional Shares $38 0.75% | | |
Expenses Paid, Amount | $ 38 | | |
Expense Ratio, Percent | 0.75% | | |
Factors Affecting Performance [Text Block] | How did the fund perform? The Parnassus Mid Cap Fund (Institutional Shares) returned -5.77% (net of fees) for the quarter, underperforming the Russell Midcap Index. The portfolio's underperformance was primarily driven by stock selection. The Health Care and Industrials sectors were the biggest detractors, due in part to our overweight positioning in life sciences tools and freight transportation stocks. We shifted the portfolio position in the Consumer Staples sector from a modest underweight to a significant underweight during the quarter and increased the overweight position in the Information Technology sector. | | |
Line Graph [Table Text Block] | Parnassus Mid Cap Fund Russell 1000 ® Russell Midcap Index 2015 $10,000 $10,000 $10,000 2015 $9,870 $9,864 $9,471 2016 $11,477 $11,053 $10,778 2017 $13,318 $13,450 $12,774 2018 $12,467 $12,806 $11,617 2019 $16,084 $16,831 $15,165 2020 $18,524 $20,359 $17,758 2021 $21,605 $25,745 $21,769 2022 $16,979 $20,821 $18,000 2023 $19,172 $26,344 $21,100 2024 $19,587 $30,094 $22,148 | | |
Average Annual Return [Table Text Block] | 1 Year 5 years Since Inception Parnassus Mid Cap Fund - Institutional Shares (Incp: April 30, 2015) 10.27% 5.21% 7.61% Russell 1000 ® 23.88% 14.61% 12.77% Russell Midcap Index 12.88% 9.46% 9.06% | | |
Performance Inception Date | | | Apr. 30, 2015 |
AssetsNet | $ 3,037,798,726 | $ 3,037,798,726 | $ 3,037,798,726 |
Holdings Count | Holding | 40 | 40 | 40 |
Advisory Fees Paid, Amount | $ 12,512,960 | | |
InvestmentCompanyPortfolioTurnover | 33% | | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $3,037,798,726 # of Portfolio Holdings 40 Portfolio Turnover Rate 33% Advisory Fees Paid $12,512,960 | | |
Holdings [Text Block] | Sector Allocation (%) Value Value Short-Term Investments, Other Assets & Liabilities 0.8% Utilities 2.3% Communication Services 2.6% Real Estate 4.1% Materials 6.2% Health Care 9.0% Consumer Discretionary 10.6% Financials 17.3% Industrials 23.1% Information Technology 24.0% | | |
Largest Holdings [Text Block] | Top Ten Holdings Fidelity National Information Services 3.9% Guidewire Software Inc. 3.7% Roper Technologies Inc. 3.6% J.B. Hunt Transport Services Inc. 3.5% Cboe Global Markets Inc. 3.5% KLA Corp. 3.2% TransUnion 3.2% Republic Services Inc., Class A 3.1% Hologic Inc. 3.1% Ross Stores Inc. 2.9% | | |
Material Fund Change [Text Block] | Material Fund Changes No material changes to the Fund in the last reporting period. | | |
Updated Prospectus Phone Number | 800-999-3505 | | |
C000156022 | | | |
Shareholder Report [Line Items] | | | |
Fund Name | Parnassus Mid Cap Growth Fund | | |
Class Name | Institutional Shares | | |
Trading Symbol | PFPRX | | |
Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Fund for the period of January 1, 2024 to June 30, 2024. | | |
Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | | |
Additional Information [Text Block] | You can find additional information about the fund at www.parnassus.com | | |
Additional Information Phone Number | 800-999-3505 | | |
Additional Information Website | www.parnassus.com</span>" id="sjs-B171"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.parnassus.com</span> | | |
Expenses [Text Block] | What was the Fund's cost for the period? (based on hypothetical $10,000 investment) Class name Cost of a $10,000 investment Cost paid as a % of a $10,000 investment Institutional Shares $35 0.68% | | |
Expenses Paid, Amount | $ 35 | | |
Expense Ratio, Percent | 0.68% | | |
Factors Affecting Performance [Text Block] | How did the fund perform? The Parnassus Mid Cap Growth Fund (Institutional Shares) returned -3.17% (net of fees) for the second quarter of 2024, mostly outperforming the Russell Midcap Growth Index's -3.21% return. Stock selection in the Information Technology and Industrials sectors contributed to relative results, while selection within Real Estate and Health Care detracted. The portfolio position in Consumer Discretionary shifted from an overweight to an underweight during the quarter, while the overweight position in Information Technology increased. | | |
Line Graph [Table Text Block] | Parnassus Mid Cap Growth Fund Russell 1000 ® Russell Midcap Growth Index 2015 $10,000 $10,000 $10,000 2015 $9,763 $9,864 $9,538 2016 $11,089 $11,053 $10,237 2017 $12,891 $13,450 $12,823 2018 $11,658 $12,806 $12,213 2019 $15,152 $16,831 $16,545 2020 $19,517 $20,359 $22,432 2021 $21,373 $25,745 $25,288 2022 $14,224 $20,821 $18,531 2023 $19,311 $26,344 $23,329 2024 $20,173 $30,094 $24,724 | | |
Average Annual Return [Table Text Block] | 1 Year 5 years Since Inception Parnassus Mid Cap Growth Fund - Institutional Shares (Incp: April 30, 2015) 19.44% 7.57% 7.96% Russell 1000 ® 23.88% 14.61% 12.77% Russell Midcap Growth Index 15.05% 9.93% 10.38% | | |
Performance Inception Date | | | Apr. 30, 2015 |
AssetsNet | $ 831,325,790 | $ 831,325,790 | $ 831,325,790 |
Holdings Count | Holding | 40 | 40 | 40 |
Advisory Fees Paid, Amount | $ 2,519,872 | | |
InvestmentCompanyPortfolioTurnover | 20% | | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $831,325,790 # of Portfolio Holdings 40 Portfolio Turnover Rate 20% Advisory Fees Paid $2,519,872 | | |
Holdings [Text Block] | Sector Allocation (%) Value Value Short-Term Investments, Other Assets & Liabilities 0.5% Communication Services 2.4% Real Estate 3.1% Materials 4.5% Financials 9.1% Consumer Discretionary 13.2% Health Care 15.9% Industrials 17.4% Information Technology 33.9% | | |
Largest Holdings [Text Block] | Top Ten Holdings Guidewire Software Inc. 5.5% Teradyne Inc. 4.9% Equifax Inc. 4.3% Trane Technologies plc 3.6% KLA Corp. 3.6% Agilent Technologies Inc. 3.4% Ross Stores Inc. 3.4% CoStar Group Inc. 3.1% Monolithic Power Systems Inc. 3.0% Mettler-Toledo International Inc. 3.0% | | |
Material Fund Change [Text Block] | Material Fund Changes No material changes to the Fund in the last reporting period. | | |
Updated Prospectus Phone Number | 800-999-3505 | | |
C000240326 | | | |
Shareholder Report [Line Items] | | | |
Fund Name | Parnassus Growth Equity Fund | | |
Class Name | Investor Shares | | |
Trading Symbol | PFGEX | | |
Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Fund for the period of January 1, 2024 to June 30, 2024. | | |
Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report | | |
Additional Information [Text Block] | You can find additional information about the fund at www.parnassus.com | | |
Additional Information Phone Number | 800-999-3505 | | |
Additional Information Website | www.parnassus.com</span>" id="sjs-B197"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">www.parnassus.com</span> | | |
Expenses [Text Block] | What was the Fund's cost for the period? (based on hypothetical $10,000 investment) Class name Cost of a $10,000 investment Cost paid as a % of a $10,000 investment Investor Shares $45 0.84% | | |
Expenses Paid, Amount | $ 45 | | |
Expense Ratio, Percent | 0.84% | | |
Factors Affecting Performance [Text Block] | How did the fund perform? The Parnassus Growth Equity Fund (Investor Shares) returned 3.74% (net of fees) for the quarter, underperforming the Russell 1000 Growth Index. The underperformance was primarily driven by our stock selection in the Information Technology sector. An overweight position and stock selection in the Financials sector also detracted. We took advantage of recent sell-offs to add two new positions in Financials and Information Technology: MSCI and Workday, respectively. We offset these new holdings by trimming our existing positions and selling Palo Alto Networks within Information Technology. | | |
Average Annual Return [Table Text Block] | 1 Year Since Inception Parnassus Growth Equity Fund - Investor Shares (Incp: December 28, 2022) 31.95% 41.74% S&P 500 Index 24.56% 29.63% Russell 1000 ® 33.48% 45.33% | | |
Performance Inception Date | | Dec. 28, 2022 | |
AssetsNet | $ 49,937,183 | $ 49,937,183 | $ 49,937,183 |
Holdings Count | Holding | 41 | 41 | 41 |
Advisory Fees Paid, Amount | $ 21,511 | | |
InvestmentCompanyPortfolioTurnover | 15% | | |
Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $49,937,183 # of Portfolio Holdings 41 Portfolio Turnover Rate 15% Advisory Fees Paid $21,511 | | |
Holdings [Text Block] | Sector Allocation (%) Value Value Short-Term Investments, Other Assets & Liabilities 2.0% Consumer Staples 1.9% Materials 2.9% Industrials 4.2% Consumer Discretionary 8.7% Financials 10.4% Communication Services 11.0% Health Care 14.7% Information Technology 44.2% | | |
Largest Holdings [Text Block] | Top Ten Holdings Microsoft Corp. 8.4% Alphabet Inc., Class A 8.1% NVIDIA Corp. 7.7% Amazon.com Inc. 4.9% Apple Inc. 4.5% Visa Inc., Class A 4.1% Eli Lilly & Co. 3.4% Salesforce Inc. 3.3% Broadcom Inc. 2.9% Intuit Inc. 2.4% | | |
Material Fund Change [Text Block] | Material Fund Changes No material changes to the Fund in the last reporting period. | | |
Updated Prospectus Phone Number | 800-999-3505 | | |