v3.26.1
Shareholder Report, Line Graph (Details) 196650_Osterweis Fund_TF_TSR Annual {TF} - USD ($)
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2026
Osterweis Fund                      
Account Value [Line Items]                      
Accumulated Value $ 23,168 $ 23,244 $ 18,311 $ 20,373 $ 19,312 $ 12,583 $ 12,956 $ 11,794 $ 11,133 $ 10,000 $ 25,768
S&P 500 [Member]                      
Account Value [Line Items]                      
Line Graph and Table Measure Name                     S&P 500
Accumulated Value $ 31,913 $ 29,480 $ 22,698 $ 24,599 $ 21,271 $ 13,605 $ 14,625 $ 13,357 $ 11,717 $ 10,000 $ 37,594