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, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
| Total loans held for investment |
|
|
|
| Total |
$ 12,195,750
|
|
$ 12,009,834
|
| Year-To-Date Gross Charge-offs |
|
|
|
| Charge offs |
21,984
|
$ 6,923
|
|
| Receivables Not Under the Fair Value Option |
|
|
|
| Total loans held for investment |
|
|
|
| Current fiscal year |
563,866
|
|
3,022,630
|
| Fiscal year before current fiscal year |
3,064,080
|
|
2,219,587
|
| Two years before current fiscal year |
2,192,202
|
|
1,561,548
|
| Three years before current fiscal year |
1,511,372
|
|
1,561,548
|
| Four years before current fiscal year |
1,481,978
|
|
1,250,966
|
| Prior |
2,016,083
|
|
1,053,567
|
| Revolving Loans Amortized Cost Basis |
841,941
|
|
794,800
|
| Revolving Loans Converted to Term |
279,288
|
|
284,563
|
| Total |
11,950,810
|
|
11,749,209
|
| Year-To-Date Gross Charge-offs |
|
|
|
| Current fiscal year |
0
|
|
3,472
|
| Fiscal year before current fiscal year |
1,524
|
|
5,518
|
| Two years before current fiscal year |
3,993
|
|
14,763
|
| Three years before current fiscal year |
6,085
|
|
16,079
|
| Four years before current fiscal year |
1,471
|
|
14,960
|
| Five years before current fiscal year |
6,334
|
|
5,624
|
| Revolving Loans Amortized Cost Basis |
2,323
|
|
4,689
|
| Revolving Loans Converted to Term |
254
|
|
9,070
|
| Charge offs |
21,984
|
|
74,175
|
| Receivables Not Under the Fair Value Option | Small Business Banking |
|
|
|
| Total loans held for investment |
|
|
|
| Current fiscal year |
321,492
|
|
1,560,828
|
| Fiscal year before current fiscal year |
1,677,182
|
|
1,376,999
|
| Two years before current fiscal year |
1,354,139
|
|
1,076,152
|
| Three years before current fiscal year |
1,035,538
|
|
1,209,592
|
| Four years before current fiscal year |
1,157,887
|
|
952,683
|
| Prior |
1,726,629
|
|
899,895
|
| Revolving Loans Amortized Cost Basis |
203,648
|
|
186,564
|
| Revolving Loans Converted to Term |
53,930
|
|
51,190
|
| Total |
7,530,445
|
|
7,312,997
|
| Year-To-Date Gross Charge-offs |
|
|
|
| Current fiscal year |
0
|
|
3,472
|
| Fiscal year before current fiscal year |
1,524
|
|
5,518
|
| Two years before current fiscal year |
3,993
|
|
14,763
|
| Three years before current fiscal year |
6,085
|
|
12,693
|
| Four years before current fiscal year |
1,471
|
|
5,188
|
| Five years before current fiscal year |
6,179
|
|
5,453
|
| Revolving Loans Amortized Cost Basis |
1,216
|
|
4,352
|
| Revolving Loans Converted to Term |
254
|
|
2,523
|
| Charge offs |
20,722
|
|
53,962
|
| Receivables Not Under the Fair Value Option | Small Business Banking | Pass |
|
|
|
| Total loans held for investment |
|
|
|
| Current fiscal year |
321,192
|
|
1,513,435
|
| Fiscal year before current fiscal year |
1,625,580
|
|
1,245,114
|
| Two years before current fiscal year |
1,213,414
|
|
936,083
|
| Three years before current fiscal year |
889,433
|
|
1,000,904
|
| Four years before current fiscal year |
927,780
|
|
828,468
|
| Prior |
1,459,411
|
|
738,567
|
| Revolving Loans Amortized Cost Basis |
168,292
|
|
154,210
|
| Revolving Loans Converted to Term |
47,640
|
|
42,701
|
| Total |
6,652,742
|
|
6,458,577
|
| Receivables Not Under the Fair Value Option | Small Business Banking | Special Mention |
|
|
|
| Total loans held for investment |
|
|
|
| Current fiscal year |
300
|
|
17,102
|
| Fiscal year before current fiscal year |
19,060
|
|
68,453
|
| Two years before current fiscal year |
71,508
|
|
64,411
|
| Three years before current fiscal year |
63,721
|
|
93,132
|
| Four years before current fiscal year |
120,549
|
|
50,885
|
| Prior |
129,151
|
|
80,251
|
| Revolving Loans Amortized Cost Basis |
13,045
|
|
8,763
|
| Revolving Loans Converted to Term |
3,937
|
|
6,721
|
| Total |
421,271
|
|
389,718
|
| Receivables Not Under the Fair Value Option | Small Business Banking | Substandard |
|
|
|
| Total loans held for investment |
|
|
|
| Current fiscal year |
0
|
|
30,291
|
| Fiscal year before current fiscal year |
32,542
|
|
63,432
|
| Two years before current fiscal year |
69,217
|
|
75,658
|
| Three years before current fiscal year |
82,384
|
|
115,556
|
| Four years before current fiscal year |
109,558
|
|
73,330
|
| Prior |
138,067
|
|
81,077
|
| Revolving Loans Amortized Cost Basis |
22,311
|
|
23,591
|
| Revolving Loans Converted to Term |
2,353
|
|
1,768
|
| Total |
456,432
|
|
464,703
|
| Receivables Not Under the Fair Value Option | Commercial Banking |
|
|
|
| Total loans held for investment |
|
|
|
| Current fiscal year |
242,374
|
|
1,461,802
|
| Fiscal year before current fiscal year |
1,386,898
|
|
842,588
|
| Two years before current fiscal year |
838,063
|
|
485,396
|
| Three years before current fiscal year |
475,834
|
|
351,956
|
| Four years before current fiscal year |
324,091
|
|
298,283
|
| Prior |
289,454
|
|
153,672
|
| Revolving Loans Amortized Cost Basis |
638,293
|
|
608,236
|
| Revolving Loans Converted to Term |
225,358
|
|
233,373
|
| Total |
4,420,365
|
|
4,435,306
|
| Year-To-Date Gross Charge-offs |
|
|
|
| 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
|
|
3,386
|
| Four years before current fiscal year |
0
|
|
9,772
|
| Five years before current fiscal year |
155
|
|
171
|
| Revolving Loans Amortized Cost Basis |
1,107
|
|
337
|
| Revolving Loans Converted to Term |
0
|
|
6,547
|
| Charge offs |
1,262
|
|
20,213
|
| Receivables Not Under the Fair Value Option | Commercial Banking | Pass |
|
|
|
| Total loans held for investment |
|
|
|
| Current fiscal year |
242,374
|
|
1,434,615
|
| Fiscal year before current fiscal year |
1,354,678
|
|
763,382
|
| Two years before current fiscal year |
766,280
|
|
405,425
|
| Three years before current fiscal year |
379,858
|
|
248,636
|
| Four years before current fiscal year |
225,877
|
|
150,616
|
| Prior |
194,580
|
|
105,386
|
| Revolving Loans Amortized Cost Basis |
597,731
|
|
581,047
|
| Revolving Loans Converted to Term |
202,423
|
|
210,917
|
| Total |
3,963,801
|
|
3,900,024
|
| Receivables Not Under the Fair Value Option | Commercial Banking | Special Mention |
|
|
|
| Total loans held for investment |
|
|
|
| Current fiscal year |
0
|
|
18,187
|
| Fiscal year before current fiscal year |
13,013
|
|
73,787
|
| Two years before current fiscal year |
63,444
|
|
79,971
|
| Three years before current fiscal year |
95,976
|
|
79,401
|
| Four years before current fiscal year |
74,633
|
|
40,071
|
| Prior |
42,506
|
|
17,734
|
| Revolving Loans Amortized Cost Basis |
18,844
|
|
12,627
|
| Revolving Loans Converted to Term |
13,027
|
|
15,743
|
| Total |
321,443
|
|
337,521
|
| Receivables Not Under the Fair Value Option | Commercial Banking | Substandard |
|
|
|
| Total loans held for investment |
|
|
|
| Current fiscal year |
0
|
|
9,000
|
| Fiscal year before current fiscal year |
19,207
|
|
5,419
|
| Two years before current fiscal year |
8,339
|
|
0
|
| Three years before current fiscal year |
0
|
|
23,919
|
| Four years before current fiscal year |
23,581
|
|
107,596
|
| Prior |
52,368
|
|
30,552
|
| Revolving Loans Amortized Cost Basis |
21,718
|
|
14,562
|
| Revolving Loans Converted to Term |
9,908
|
|
6,713
|
| Total |
$ 135,121
|
|
$ 197,761
|