v3.26.1
Earnings Per Common Share - Additional Information (Detail) - shares
6 Months Ended
Feb. 28, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Common stock, shares outstanding   95,869,209   96,067,559
Premier Financial Corporation [Member]        
Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Issuance of common stock, net of issuance costs, shares 28,738,104      
Common stock, shares outstanding 20,316,670      
Premier Financial Corporation [Member] | Treasury Stock [Member]        
Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Issuance of common stock, net of issuance costs, shares 8,421,434      
Stock Option [Member]        
Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Securities excluded from computation of net income per diluted shares   144,501 426,586