S000000852 [Member] Expense Example - Parnassus Mid Cap Growth Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Investor Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | $ 82 |
| Expense Example, with Redemption, 3 Years | 260 |
| Expense Example, with Redemption, 5 Years | 453 |
| Expense Example, with Redemption, 10 Years | 1,012 |
| Institutional Shares | |
| Prospectus [Line Items] | |
| Expense Example, with Redemption, 1 Year | 69 |
| Expense Example, with Redemption, 3 Years | 222 |
| Expense Example, with Redemption, 5 Years | 388 |
| Expense Example, with Redemption, 10 Years | $ 869 |