v3.26.1
Mergers and Acquisitions - Narrative (Details)
3 Months Ended 6 Months Ended
Apr. 30, 2026
USD ($)
Apr. 01, 2025
USD ($)
bankingLocation
shares
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Business Combination [Line Items]              
Merger and conversion related expenses     $ 0 $ 20,479,000 $ 0 $ 21,270,000  
Goodwill     1,417,538,000 $ 1,419,782,000 1,417,538,000 $ 1,419,782,000 $ 1,405,840,000
The First              
Business Combination [Line Items]              
Total purchase consideration   $ 1,052,690,000          
Shares issued to common shareholders (in shares) | shares   30,811,851          
Cash settlement for stock options   $ 1,869,000          
Voting interest acquired (percent)   100.00%          
Number of locations acquired | bankingLocation   116          
Intangible assets, including goodwill   $ 584,499,000          
Goodwill   419,023,000          
Core deposit intangible   159,610,000          
Customer relationship intangible   $ 5,866,000          
Weighted average useful life (in years)   10 years          
Borrowings   $ 419,165,000          
The First | Subordinated notes              
Business Combination [Line Items]              
Borrowings   95,262,000          
The First | Junior subordinated debentures              
Business Combination [Line Items]              
Borrowings   25,653,000          
The First | Federal Home Loan Bank Advances              
Business Combination [Line Items]              
Short-term borrowings   298,250,000          
Fair Value of Net Assets Acquired              
Business Combination [Line Items]              
Goodwill   $ 419,023,000          
REV Capital              
Business Combination [Line Items]              
Total purchase consideration $ 76,353,000            
Voting interest acquired (percent) 100.00%            
Goodwill $ 10,871,000            
Cash consideration $ 70,026,000            
Obligation to pay additional amounts, period 2 years            
Contingent consideration, liability     $ 6,327,000   $ 6,327,000    
Factoring receivables, average interest 5.00%            
REV Capital | Customer relationship intangible              
Business Combination [Line Items]              
Intangible asset, useful life 6 years            
REV Capital | Contract-based intangible              
Business Combination [Line Items]              
Intangible asset, useful life 3 years            
REV Capital | Minimum              
Business Combination [Line Items]              
Contingent consideration, liability $ 0            
REV Capital | Maximum              
Business Combination [Line Items]              
Contingent consideration, liability $ 6,983,000