XML 78 R62.htm IDEA: XBRL DOCUMENT v3.25.4
Merger, Acquisition, and Divestiture Activity - Additional Information (Details)
 12 Months Ended
May 23, 2025
USD ($)
shares
May 01, 2025
USD ($)
$ / shares
Nov. 25, 2024
USD ($)
shares
Apr. 01, 2024
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Business Combination [Line Items]            
Purchase price of loans at acquisition       $ 610,700,000    
Par value of acquired loans at acquisition       679,300,000    
Allowance for credit losses at acquisition       26,700,000    
Income before income taxes         $ 1,093,740,000 $ 635,364,000
Bremer            
Business Combination [Line Items]            
Cash per share above exchange (in dollars per share) | $ / shares   $ 26.22        
Shares exchange ratio   4.182        
Expected tax deductible amount   $ 0        
Other intangible assets   440,099,000        
Purchase price of loans at acquisition   1,900,000,000     1,876,226,000  
Par value of acquired loans at acquisition   2,100,000,000     2,055,598,000  
Allowance for credit losses at acquisition   103,500,000     103,546,000  
Acquisition and integration related costs         132,600,000  
Bremer | Merger-Related Cost            
Business Combination [Line Items]            
Income before income taxes         (132,600,000)  
Bremer | Provision for Credit Losses On Unfunded Loan Commitments            
Business Combination [Line Items]            
Income before income taxes         (6,500,000)  
Bremer | Provision For Credit Losses, Loans Acquired            
Business Combination [Line Items]            
Income before income taxes         (69,100,000)  
Bremer | Benefit Freezing and Subsequent Termination            
Business Combination [Line Items]            
Income before income taxes         5,100,000  
Bremer | Core deposit            
Business Combination [Line Items]            
Other intangible assets   $ 397,100,000        
Estimated useful lives of core deposits and customer relationships   10 years        
Bremer | Customer trust relationships            
Business Combination [Line Items]            
Other intangible assets   $ 43,000,000.0        
Estimated useful lives of core deposits and customer relationships   12 years        
Bremer | Citibank, N.A            
Business Combination [Line Items]            
Forward contract indexed to issuer's equity (in shares) | shares     19,047,619      
Forward contract indexed to equity, settlement, cash, amount     $ 400,000,000.0      
Bremer | Citigroup Global Markets Inc.            
Business Combination [Line Items]            
Forward contract indexed to issuer's equity (in shares) | shares 21,904,762          
Forward contract indexed to equity, settlement, cash, amount $ 443,200,000          
Equity interest issued or issuable, additional number of shares to purchase (in shares) | shares     2,857,143      
Equity interest issued or issuable, additional number of shares (in shares) | shares     2,857,143      
CapStar Financial Holdings, Inc.            
Business Combination [Line Items]            
Other intangible assets       $ 46,125,000    
Purchase price of loans at acquisition         610,691,000  
Par value of acquired loans at acquisition         679,302,000  
Allowance for credit losses at acquisition         26,725,000 26,700,000
Acquisition and integration related costs         $ 3,600,000 $ 26,300,000
CapStar Financial Holdings, Inc. | Core deposit            
Business Combination [Line Items]            
Estimated useful lives of core deposits and customer relationships       10 years