v3.26.1
Segment Reporting (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Segment Reporting [Abstract]              
Number of reportable segments | segment         2    
Financial information for the Company's operating segments              
Total interest income $ 340,440   $ 343,898   $ 678,560 $ 564,228  
Total interest expense 117,686   125,039   232,247 211,172  
Net interest income 222,754   218,859   446,313 353,056  
Provision for credit losses 3,799   81,322   11,879 86,072  
Noninterest income (loss) 51,190   48,334   101,462 84,729  
Salaries and employee benefits 96,228   99,542   187,977 171,499  
Net occupancy and equipment 18,018   17,359   36,049 29,113  
Other segment expenses 47,255   66,303   92,803 96,468  
Income (loss) before income taxes 108,644   2,667   219,067 54,633  
Income tax expense (benefit) 21,553   1,649   43,748 12,097  
Net income (loss) 87,091 $ 88,228 1,018 $ 41,518 175,319 42,536  
Total assets 27,004,999   26,624,975   27,004,999 26,624,975 $ 26,751,426
Goodwill 1,417,538   1,419,782   1,417,538 1,419,782 1,405,840
Community Banks              
Financial information for the Company's operating segments              
Goodwill 1,417,538       1,417,538   $ 1,405,840
Operating segments              
Financial information for the Company's operating segments              
Total interest income 340,420   343,875   678,521 564,182  
Total interest expense 107,550   116,242   214,985 195,876  
Net interest income 232,870   227,633   463,536 368,306  
Provision for credit losses 3,799   81,322   11,879 86,072  
Noninterest income (loss) 48,864   48,830   97,700 85,666  
Salaries and employee benefits 94,814   99,542   185,385 171,499  
Net occupancy and equipment 17,931   17,326   35,875 29,080  
Other segment expenses 46,820   66,399   91,677 96,066  
Income (loss) before income taxes 118,370   11,874   236,420 71,255  
Income tax expense (benefit) 24,061   4,051   48,204 16,357  
Net income (loss) 94,309   7,823   188,216 54,898  
Total assets 26,986,724   26,605,052   26,986,724 26,605,052  
Goodwill 1,417,538   1,419,782   1,417,538 1,419,782  
Operating segments | Community Banks              
Financial information for the Company's operating segments              
Total interest income 340,407   343,875   678,494 564,182  
Total interest expense 107,550   116,242   214,985 195,876  
Net interest income 232,857   227,633   463,509 368,306  
Provision for credit losses 3,799   81,322   11,879 86,072  
Noninterest income (loss) 38,543   41,424   77,646 70,785  
Salaries and employee benefits 89,824   95,985   175,495 164,139  
Net occupancy and equipment 17,684   17,112   35,378 28,662  
Other segment expenses 45,150   65,276   87,898 93,962  
Income (loss) before income taxes 114,943   9,362   230,505 66,256  
Income tax expense (benefit) 23,705   3,917   47,734 16,120  
Net income (loss) 91,238   5,445   182,771 50,136  
Total assets 26,977,257   26,598,942   26,977,257 26,598,942  
Goodwill 1,417,538   1,419,782   1,417,538 1,419,782  
Operating segments | Wealth Management              
Financial information for the Company's operating segments              
Total interest income 13   0   27 0  
Total interest expense 0   0   0 0  
Net interest income 13   0   27 0  
Provision for credit losses 0   0   0 0  
Noninterest income (loss) 10,321   7,406   20,054 14,881  
Salaries and employee benefits 4,990   3,557   9,890 7,360  
Net occupancy and equipment 247   214   497 418  
Other segment expenses 1,670   1,123   3,779 2,104  
Income (loss) before income taxes 3,427   2,512   5,915 4,999  
Income tax expense (benefit) 356   134   470 237  
Net income (loss) 3,071   2,378   5,445 4,762  
Total assets 9,467   6,110   9,467 6,110  
Goodwill 0   0   0 0  
Other              
Financial information for the Company's operating segments              
Total interest income 20   23   39 46  
Total interest expense 10,136   8,797   17,262 15,296  
Net interest income (10,116)   (8,774)   (17,223) (15,250)  
Provision for credit losses 0   0   0 0  
Noninterest income (loss) 2,326   (496)   3,762 (937)  
Salaries and employee benefits 1,414   0   2,592 0  
Net occupancy and equipment 87   33   174 33  
Other segment expenses 435   (96)   1,126 402  
Income (loss) before income taxes (9,726)   (9,207)   (17,353) (16,622)  
Income tax expense (benefit) (2,508)   (2,402)   (4,456) (4,260)  
Net income (loss) (7,218)   (6,805)   (12,897) (12,362)  
Total assets 18,275   19,923   18,275 19,923  
Goodwill $ 0   $ 0   $ 0 $ 0