Annual Total Returns

12 Months Ended

Dec. 31, 2025

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Dec. 31, 2016

Osterweis Fund | Osterweis Fund Investor Class

Prospectus [Line Items]

Annual Return [Percent]

^[1]

12.87%

13.38%

22.65%

(21.87%)

19.29%

23.13%

33.12%

(7.26%)

14.43%

4.87%

Osterweis Strategic Income Fund | Osterweis Strategic Income Fund Investor Class

Prospectus [Line Items]

Annual Return [Percent]

^[2]

5.47%

8.03%

12.30%

(5.94%)

5.48%

9.02%

5.35%

(0.66%)

5.99%

10.95%

Osterweis Growth & Income Fund | Osterweis Growth & Income Fund Investor Class

Prospectus [Line Items]

Annual Return [Percent]

^[3]

10.63%

10.53%

14.76%

(14.99%)

17.70%

17.54%

22.23%

(7.33%)

12.85%

9.82%

Osterweis Opportunity Fund | Osterweis Opportunity Fund Investor Class

Prospectus [Line Items]

Annual Return [Percent]

^[4]

0.27%

22.48%

23.98%

(33.00%)

3.95%

83.24%

28.03%

1.64%

26.44%

9.76%

[1]	The Osterweis Fund’s calendar year-to-date return as of March 31, 2026 was -4.68%.
[2]	The Osterweis Strategic Income Fund’s calendar year-to-date return as of March 31, 2026 was -0.09%.
[3]	The Osterweis Growth & Income Fund’s calendar year-to-date return as of March 31, 2026 was -2.13%
[4]	The Osterweis Opportunity Fund’s calendar year-to-date return as of March 31, 2026 was -3.78%.