Shareholder Report, Average Annual Return (Details) 196650_Osterweis Fund_TF_TSR Annual {TF} |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2026 |
Mar. 31, 2026 |
|
| Without Sales Load [Member] | Osterweis Fund | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | OSTFX (without sales charge) | ||
| Average Annual Return, Percent | 11.22% | 5.94% | 9.93% |
| S&P 500 [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | S&P 500 | ||
| Average Annual Return, Percent | 17.80% | 12.06% | 14.16% |