v3.26.1
Earnings Per Share - Computation of Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Earnings Per Share, Basic, by Common Class, Including Two Class Method        
Net income attributable to Piper Sandler Companies $ 67,845 $ 42,182 $ 133,087 $ 107,097
Shares for basic and diluted calculations        
Average shares used in basic computation (in shares) 67,698 66,812 [1] 67,769 66,166 [1]
Average shares used in diluted computation (in shares) 71,241 70,903 [1] 71,237 71,030 [1]
Earnings per common share        
Basic $ 1.00 $ 0.63 [1] $ 1.96 $ 1.62 [1]
Diluted $ 0.95 $ 0.59 [1] $ 1.87 $ 1.51 [1]
Stock options        
Shares for basic and diluted calculations        
Dilutive impact of securities (in shares) 198 205 201 235
Restricted stock units        
Shares for basic and diluted calculations        
Dilutive impact of securities (in shares) 538 580 483 567
Restricted stock        
Shares for basic and diluted calculations        
Dilutive impact of securities (in shares) 2,807 3,305 2,784 4,062
[1] Common shares and per common share information have been adjusted to reflect the four-for-one forward split of common stock, as discussed in Note 1.