v3.26.1
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2026
Jul. 29, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Entity File Number 001-31720  
Entity Registrant Name PIPER SANDLER COMPANIES  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 30-0168701  
Entity Address, Address Line One 350 North 5th Street, Suite 1000  
Entity Address, City or Town Minneapolis  
Entity Address, State or Province MN  
Entity Address, Postal Zip Code 55401-5711  
City Area Code (612)  
Local Phone Number 303-6000  
Title of Each Class Common Stock, par value $0.01 per share  
Trading Symbol PIPR  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   70,670,291
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Entity Central Index Key 0001230245  
Current Fiscal Year End Date --12-31