v3.26.1
SEGMENT REPORTING - Schedule of Segment Reporting, by Reportable Business Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Interest income $ 365,575 $ 347,638 $ 717,346 $ 681,416  
Interest expense 113,091 115,825 220,426 227,764  
Net interest income 252,484 231,813 496,920 453,652  
Provision for credit losses 17,253 2,772 33,804 24,664  
Noninterest income 73,532 68,911 143,452 132,934  
Noninterest expense          
Salaries and employee benefits 91,494 89,308 182,860 175,923  
Occupancy and equipment 12,555 11,401 24,180 22,078  
Data processing and communications expenses 15,571 15,366 32,364 30,221  
Other expenses 123,094 39,185 160,390 78,072  
Total noninterest expense 242,714 155,260 399,794 306,294  
Income before income tax expense 66,049 142,692 206,774 255,628  
Income tax expense 14,603 32,858 44,836 57,859  
Net income 51,446 109,834 161,938 197,769  
Total assets 28,488,843 26,680,153 28,488,843 26,680,153 $ 27,515,879
Goodwill 1,015,646 1,015,646 1,015,646 1,015,646 1,015,646
Other intangible assets, net 48,317 62,582 48,317 62,582 $ 54,824
Banking Division          
Segment Reporting [Line Items]          
Interest income 256,966 239,211 506,226 472,530  
Interest expense 41,666 47,710 82,559 96,816  
Net interest income 215,300 191,501 423,667 375,714  
Provision for credit losses 19,998 677 31,851 17,097  
Noninterest income 40,569 29,275 73,360 57,999  
Noninterest expense          
Salaries and employee benefits 66,668 62,001 132,914 124,717  
Occupancy and equipment 11,823 10,547 22,753 20,351  
Data processing and communications expenses 14,041 13,825 29,389 27,216  
Other expenses 110,933 25,478 134,831 51,163  
Total noninterest expense 203,465 111,851 319,887 223,447  
Income before income tax expense 32,406 108,248 145,289 193,169  
Income tax expense 7,538 25,667 31,935 44,821  
Net income 24,868 82,581 113,354 148,348  
Total assets 20,587,632 19,143,429 20,587,632 19,143,429  
Goodwill 951,148 951,148 951,148 951,148  
Other intangible assets, net 48,317 60,952 48,317 60,952  
Retail Mortgage Division          
Segment Reporting [Line Items]          
Interest income 56,591 61,356 112,304 119,288  
Interest expense 40,747 39,325 79,632 75,413  
Net interest income 15,844 22,031 32,672 43,875  
Provision for credit losses (3,346) 1,010 (272) 6,201  
Noninterest income 32,151 37,726 68,467 72,455  
Noninterest expense          
Salaries and employee benefits 21,493 24,358 43,405 45,353  
Occupancy and equipment 685 811 1,334 1,640  
Data processing and communications expenses 1,302 1,391 2,526 2,688  
Other expenses 11,587 12,496 24,119 24,459  
Total noninterest expense 35,067 39,056 71,384 74,140  
Income before income tax expense 16,274 19,691 30,027 35,989  
Income tax expense 3,417 4,135 6,305 7,558  
Net income 12,857 15,556 23,722 28,431  
Total assets 4,508,490 4,723,883 4,508,490 4,723,883  
Goodwill 0 0 0 0  
Other intangible assets, net 0 0 0 0  
Warehouse Lending Division          
Segment Reporting [Line Items]          
Interest income 21,314 18,174 39,159 33,374  
Interest expense 12,489 11,083 22,740 20,381  
Net interest income 8,825 7,091 16,419 12,993  
Provision for credit losses 184 369 361 194  
Noninterest income 794 1,893 1,590 2,447  
Noninterest expense          
Salaries and employee benefits 468 618 1,012 1,170  
Occupancy and equipment 7 7 15 14  
Data processing and communications expenses 59 59 94 97  
Other expenses 184 96 363 366  
Total noninterest expense 718 780 1,484 1,647  
Income before income tax expense 8,717 7,835 16,164 13,599  
Income tax expense 1,831 1,646 3,395 2,856  
Net income 6,886 6,189 12,769 10,743  
Total assets 1,367,630 1,114,158 1,367,630 1,114,158  
Goodwill 0 0 0 0  
Other intangible assets, net 0 0 0 0  
Premium  Finance  Division          
Segment Reporting [Line Items]          
Interest income 30,704 28,897 59,657 56,224  
Interest expense 18,189 17,707 35,495 35,154  
Net interest income 12,515 11,190 24,162 21,070  
Provision for credit losses 417 716 1,864 1,172  
Noninterest income 18 17 35 33  
Noninterest expense          
Salaries and employee benefits 2,865 2,331 5,529 4,683  
Occupancy and equipment 40 36 78 73  
Data processing and communications expenses 169 91 355 220  
Other expenses 390 1,115 1,077 2,084  
Total noninterest expense 3,464 3,573 7,039 7,060  
Income before income tax expense 8,652 6,918 15,294 12,871  
Income tax expense 1,817 1,410 3,201 2,624  
Net income 6,835 5,508 12,093 10,247  
Total assets 2,025,091 1,698,683 2,025,091 1,698,683  
Goodwill 64,498 64,498 64,498 64,498  
Other intangible assets, net $ 0 $ 1,630 $ 0 $ 1,630