v3.26.1
Business Combinations - Narrative (Details)
3 Months Ended 6 Months Ended
Feb. 01, 2025
USD ($)
bankingOffice
$ / shares
shares
Jun. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Business Combination [Line Items]                
Assets       $ 8,439,998,000   $ 8,388,780,000    
Loans       5,852,861,000   5,797,403,000    
Deposits       6,995,763,000   6,989,742,000    
Goodwill       375,470,000   375,470,000    
Allowance for credit losses   $ 75,510,000 $ 75,510,000 $ 79,374,000 $ 78,547,000 $ 77,694,000 $ 75,158,000 $ 44,436,000
Heartland BancCorp                
Business Combination [Line Items]                
Number of banking offices | bankingOffice 20              
Assets $ 1,940,000,000              
Loans 1,580,000,000              
Deposits 1,730,000,000              
Direct acquisition costs 23,196,000              
Goodwill 196,445,000              
Intangible assets 40,065,000              
Goodwill deductible for tax purposes 0              
Cash paid for acquisition 23,102,000              
Non-recurring merger costs excluded from pro forma information   929,000 6,861,000          
Heartland BancCorp | Adjustment                
Business Combination [Line Items]                
Allowance for credit losses   $ 16,200,000 $ 16,200,000          
Heartland BancCorp | PCD Loans                
Business Combination [Line Items]                
Fair value of non-impaired loans and customers receivables acquired 91,377,000              
Acquired loan balance 112,839,000              
Estimated contractual cash flows of purchased financial asset with credit deterioration $ 16,503,000              
Heartland BancCorp | Common Stock                
Business Combination [Line Items]                
Share price (in dollars per share) | $ / shares $ 3.90              
Shares issued for acquisition (in shares) | shares 7,742,723              
Heartland BancCorp | Synergies and Cost Savings                
Business Combination [Line Items]                
Goodwill $ 196,445,000              
Heartland BancCorp | Core Deposits                
Business Combination [Line Items]                
Intangible assets $ 40,065,000              
Weighted average useful live of acquired intangibles (in years) 8 years