v3.26.3
Segment Information (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
segment
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Segment Reporting [Abstract]          
Number of operating segments | segment     1    
Number of reportable segments | segment     1    
Segment Reporting [Line Items]          
Interest income $ 210,171 $ 194,678 $ 616,861 $ 546,843  
Reconciliation of revenue          
Service charges and fees 17,935 16,911 51,961 47,695  
Trust and other financial services income 10,108 8,040 28,175 23,898  
Less:          
Interest expense 61,221 58,704 178,491 163,607  
Less:          
Provision for credit losses     20,122 47,860  
Compensation and employee benefits 63,931 63,014 185,737 172,767  
Processing expenses 17,452 15,072 51,206 42,035  
Premises and occupancy costs 8,943 7,707 27,300 23,229  
Professional services 3,094 3,010 10,107 9,756  
Office operations 3,651 3,495 11,186 9,382  
Federal deposit insurance premiums   3,361 5,773 7,985  
Income tax expense 16,071 302 48,893 23,792  
Net income 50,719 3,167 154,801 80,300  
Other segment disclosures          
Interest income 210,171 194,678 616,861 546,843  
Interest expense 61,221 58,704 178,491 163,607  
Amortization 2,070 1,974 6,425 2,914  
Provision for credit losses     20,122 47,860  
Segment assets 17,309,859   17,309,859   $ 16,766,617
Banking Segment          
Segment Reporting [Line Items]          
Interest income 210,171 194,678 616,861 546,843  
Reconciliation of revenue          
Service charges and fees 17,935 16,911 51,961 47,695  
Trust and other financial services income 10,108 8,040 28,175 23,898  
Other revenue 7,884 7,247 22,602 19,898  
Consolidated revenues 246,098 226,876 719,599 638,334  
Less:          
Interest expense 61,221 58,704 178,491 163,607  
Segment net interest income and noninterest income 184,877 168,172 541,108 474,727  
Less:          
Provision for credit losses 9,116 31,205 20,122 47,860  
Compensation and employee benefits 63,931 63,014 185,737 172,767  
Processing expenses 17,452 15,072 51,206 42,035  
Premises and occupancy costs 8,943 7,707 27,300 23,229  
Professional services 3,094 3,010 10,107 9,756  
Office operations 3,651 3,495 11,186 9,382  
Federal deposit insurance premiums 3,169 3,361 5,773 7,985  
Other segment items 8,731 37,839 25,983 57,621  
Income tax expense 16,071 302 48,893 23,792  
Net income 50,719 3,167 154,801 80,300  
Other segment disclosures          
Interest income 210,171 194,678 616,861 546,843  
Interest expense 61,221 58,704 178,491 163,607  
Depreciation 3,389 1,147 9,721 6,667  
Amortization 2,070 1,974 6,425 2,914  
Provision for credit losses 9,116 31,205 20,122 47,860  
Segment assets 17,309,859 16,381,009 17,309,859 16,381,009  
Expenditures for segment assets $ 7,819 $ 3,648 $ 17,683 $ 9,099