v3.25.1
Loans and Leases Held for Investment and Credit Quality - Schedule of Asset Quality Indicators by Portfolio Class and Origination Year (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Total loans held for investment      
Total $ 10,728,252   $ 10,263,355
Year-To-Date Gross Charge-offs      
Charge offs 6,923 $ 3,632  
Receivables Not Under the Fair Value Option      
Total loans held for investment      
Current fiscal year 566,120   2,302,364
Fiscal year before current fiscal year 2,352,581   1,928,177
Two years before current fiscal year 1,886,378   2,003,945
Three years before current fiscal year 1,910,373   1,520,116
Four years before current fiscal year 1,472,739   704,224
Prior 1,319,661   724,494
Revolving Loans Amortized Cost Basis 708,331   590,812
Revolving Loans Converted to Term 195,262   160,477
Total 10,411,445   9,934,609
Year-To-Date Gross Charge-offs      
Current fiscal year 0   652
Fiscal year before current fiscal year 1,822   4,215
Two years before current fiscal year 1,269   23,806
Three years before current fiscal year 2,135   6,447
Four years before current fiscal year 76   4,218
Five years before current fiscal year 1,152   3,481
Revolving Loans Amortized Cost Basis 469   5,090
Revolving Loans Converted to Term 0   170
Charge offs 6,923   48,079
Receivables Not Under the Fair Value Option | Small Business Banking      
Total loans held for investment      
Current fiscal year 321,935   1,133,197
Fiscal year before current fiscal year 1,229,780   1,159,616
Two years before current fiscal year 1,169,769   1,485,687
Three years before current fiscal year 1,423,128   1,137,917
Four years before current fiscal year 1,101,069   599,849
Prior 1,129,907   625,759
Revolving Loans Amortized Cost Basis 167,516   155,021
Revolving Loans Converted to Term 39,379   36,544
Total 6,582,483   6,333,590
Year-To-Date Gross Charge-offs      
Current fiscal year 0   652
Fiscal year before current fiscal year 1,822   4,198
Two years before current fiscal year 1,269   18,630
Three years before current fiscal year 2,135   4,954
Four years before current fiscal year 76   3,462
Five years before current fiscal year 1,152   3,481
Revolving Loans Amortized Cost Basis 469   3,555
Revolving Loans Converted to Term 0   170
Charge offs 6,923   39,102
Receivables Not Under the Fair Value Option | Commercial Banking      
Total loans held for investment      
Current fiscal year 244,185   1,169,167
Fiscal year before current fiscal year 1,122,801   768,561
Two years before current fiscal year 716,609   518,258
Three years before current fiscal year 487,245   380,738
Four years before current fiscal year 370,413   103,475
Prior 189,251   98,735
Revolving Loans Amortized Cost Basis 540,815   435,791
Revolving Loans Converted to Term 155,883   123,933
Total 3,827,202   3,598,658
Year-To-Date Gross Charge-offs      
Current fiscal year     0
Fiscal year before current fiscal year     17
Two years before current fiscal year     5,176
Three years before current fiscal year     1,493
Four years before current fiscal year     756
Five years before current fiscal year     0
Revolving Loans Amortized Cost Basis     1,535
Revolving Loans Converted to Term     0
Charge offs     8,977
Receivables Not Under the Fair Value Option | Paycheck Protection Program      
Total loans held for investment      
Current fiscal year 0   0
Fiscal year before current fiscal year 0   0
Two years before current fiscal year 0   0
Three years before current fiscal year 0   1,461
Four years before current fiscal year 1,257   900
Prior 503   0
Revolving Loans Amortized Cost Basis 0   0
Revolving Loans Converted to Term 0   0
Total 1,760   2,361
Pass | Receivables Not Under the Fair Value Option | Small Business Banking      
Total loans held for investment      
Current fiscal year 321,320   1,112,351
Fiscal year before current fiscal year 1,194,328   1,084,996
Two years before current fiscal year 1,062,093   1,323,982
Three years before current fiscal year 1,218,096   1,001,021
Four years before current fiscal year 963,900   528,008
Prior 905,959   482,192
Revolving Loans Amortized Cost Basis 131,367   124,370
Revolving Loans Converted to Term 35,824   33,359
Total 5,832,887   5,690,279
Pass | Receivables Not Under the Fair Value Option | Commercial Banking      
Total loans held for investment      
Current fiscal year 244,185   1,169,167
Fiscal year before current fiscal year 1,121,801   752,078
Two years before current fiscal year 700,250   398,333
Three years before current fiscal year 395,072   207,755
Four years before current fiscal year 188,678   51,552
Prior 120,302   81,166
Revolving Loans Amortized Cost Basis 531,286   423,334
Revolving Loans Converted to Term 137,117   116,594
Total 3,438,691   3,199,979
Pass | Receivables Not Under the Fair Value Option | Paycheck Protection Program      
Total loans held for investment      
Current fiscal year 0   0
Fiscal year before current fiscal year 0   0
Two years before current fiscal year 0   0
Three years before current fiscal year 0   1,461
Four years before current fiscal year 1,257   900
Prior 503   0
Revolving Loans Amortized Cost Basis 0   0
Revolving Loans Converted to Term 0   0
Total 1,760   2,361
Special Mention | Receivables Not Under the Fair Value Option | Small Business Banking      
Total loans held for investment      
Current fiscal year 615   7,041
Fiscal year before current fiscal year 20,262   46,047
Two years before current fiscal year 63,949   77,638
Three years before current fiscal year 102,214   61,906
Four years before current fiscal year 53,783   31,575
Prior 104,710   83,693
Revolving Loans Amortized Cost Basis 26,463   22,729
Revolving Loans Converted to Term 1,542   2,790
Total 373,538   333,419
Special Mention | Receivables Not Under the Fair Value Option | Commercial Banking      
Total loans held for investment      
Current fiscal year 0   0
Fiscal year before current fiscal year 1,000   16,483
Two years before current fiscal year 16,359   88,464
Three years before current fiscal year 73,194   36,165
Four years before current fiscal year 51,389   24,018
Prior 36,457   17,569
Revolving Loans Amortized Cost Basis 9,127   9,555
Revolving Loans Converted to Term 5,552   4,245
Total 193,078   196,499
Substandard | Receivables Not Under the Fair Value Option | Small Business Banking      
Total loans held for investment      
Current fiscal year 0   13,805
Fiscal year before current fiscal year 15,190   28,573
Two years before current fiscal year 43,727   84,067
Three years before current fiscal year 102,818   74,990
Four years before current fiscal year 83,386   40,266
Prior 119,238   59,874
Revolving Loans Amortized Cost Basis 9,686   7,922
Revolving Loans Converted to Term 2,013   395
Total 376,058   309,892
Substandard | Receivables Not Under the Fair Value Option | Commercial Banking      
Total loans held for investment      
Current fiscal year 0   0
Fiscal year before current fiscal year 0   0
Two years before current fiscal year 0   31,461
Three years before current fiscal year 18,979   136,818
Four years before current fiscal year 130,346   27,905
Prior 32,492   0
Revolving Loans Amortized Cost Basis 402   2,902
Revolving Loans Converted to Term 13,214   3,094
Total $ 195,433   $ 202,180