S000000856 [Member] Expense Example - Parnassus Core Equity Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Investor Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 83 |
| Expense Example, with Redemption, 3 Years | 267 |
| Expense Example, with Redemption, 5 Years | 467 |
| Expense Example, with Redemption, 10 Years | 1,045 |
| Institutional Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 62 |
| Expense Example, with Redemption, 3 Years | 195 |
| Expense Example, with Redemption, 5 Years | 340 |
| Expense Example, with Redemption, 10 Years | $ 762 |