S000000855 [Member] Expense Example - Parnassus Value Equity Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Investor Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 90 |
| Expense Example, with Redemption, 3 Years | 300 |
| Expense Example, with Redemption, 5 Years | 528 |
| Expense Example, with Redemption, 10 Years | 1,182 |
| Institutional Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 66 |
| Expense Example, with Redemption, 3 Years | 223 |
| Expense Example, with Redemption, 5 Years | 394 |
| Expense Example, with Redemption, 10 Years | $ 888 |