Loans Held for Investment - Internal Risk Grades (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Internal risk grades of non-covered loans
2025	$ 479,030
2024	1,538,987
2023	888,488
2022	1,374,941
2021	1,474,317
2020 and Prior	927,332
Revolving	627,130
Loans Converted To Term Loans	99,182
Total loans with credit quality measures	7,409,407
Loan Charge-offs	4,417	$ 4,711
Total	7,966,777		$ 7,950,551
Commercial real estate | Non-owner occupied
Internal risk grades of non-covered loans
Current period gross charge-offs, 2024	918
Loan Charge-offs	918	1,647
Total	1,938,960		1,921,691
Commercial real estate | Non-owner occupied | Internal Grade 1-3 (Pass low risk)
Internal risk grades of non-covered loans
2025	22,642
2024	7,497
2023	4,852
2022	40,932
2021	78,210
2020 and Prior	7,668
Revolving	2
Total loans with credit quality measures	161,803
Commercial real estate | Non-owner occupied | Internal Grade 4-7 (Pass normal risk)
Internal risk grades of non-covered loans
2025	61,018
2024	273,552
2023	79,410
2022	212,658
2021	266,511
2020 and Prior	131,579
Revolving	9,965
Loans Converted To Term Loans	15,793
Total loans with credit quality measures	1,050,486
Commercial real estate | Non-owner occupied | Internal Grade 8-11 (Pass high risk and watch)
Internal risk grades of non-covered loans
2025	61,727
2024	98,194
2023	130,249
2022	170,901
2021	46,121
2020 and Prior	120,859
Revolving	28,496
Loans Converted To Term Loans	1,168
Total loans with credit quality measures	657,715
Commercial real estate | Non-owner occupied | Special Mention
Internal risk grades of non-covered loans
2021	17,052
Total loans with credit quality measures	17,052
Commercial real estate | Non-owner occupied | Internal Grade 13 (Substandard accrual)
Internal risk grades of non-covered loans
2024	16,952
2023	1,874
2022	7,502
2021	20,774
2020 and Prior	561
Total loans with credit quality measures	47,663
Commercial real estate | Non-owner occupied | Internal Grade 14 (Substandard non-accrual)
Internal risk grades of non-covered loans
2024	344
2023	759
2022	1,296
2021	1,406
2020 and Prior	436
Total loans with credit quality measures	4,241
Commercial real estate | Owner occupied
Internal risk grades of non-covered loans
Total	1,446,177		1,435,945
Commercial real estate | Owner occupied | Internal Grade 1-3 (Pass low risk)
Internal risk grades of non-covered loans
2025	8,332
2024	31,271
2023	32,385
2022	12,331
2021	20,550
2020 and Prior	64,082
Revolving	7,783
Loans Converted To Term Loans	11,922
Total loans with credit quality measures	188,656
Commercial real estate | Owner occupied | Internal Grade 4-7 (Pass normal risk)
Internal risk grades of non-covered loans
2025	39,198
2024	122,591
2023	99,963
2022	111,421
2021	180,728
2020 and Prior	210,082
Revolving	26,849
Loans Converted To Term Loans	9,026
Total loans with credit quality measures	799,858
Commercial real estate | Owner occupied | Internal Grade 8-11 (Pass high risk and watch)
Internal risk grades of non-covered loans
2025	19,142
2024	61,418
2023	38,448
2022	94,182
2021	54,619
2020 and Prior	110,317
Revolving	10,947
Loans Converted To Term Loans	505
Total loans with credit quality measures	389,578
Commercial real estate | Owner occupied | Special Mention
Internal risk grades of non-covered loans
2024	2,459
2023	934
2022	19,558
Total loans with credit quality measures	22,951
Commercial real estate | Owner occupied | Internal Grade 13 (Substandard accrual)
Internal risk grades of non-covered loans
2025	1,480
2024	8,829
2023	1,014
2022	7,371
2021	9,460
2020 and Prior	10,445
Total loans with credit quality measures	38,599
Commercial real estate | Owner occupied | Internal Grade 14 (Substandard non-accrual)
Internal risk grades of non-covered loans
2024	1,242
2022	423
2021	583
2020 and Prior	4,287
Total loans with credit quality measures	6,535
Commercial and industrial
Internal risk grades of non-covered loans
Current period gross charge-offs, 2024	117
Current period gross charge-offs,2023	156
Current period gross charge-offs, Revolving	2,079
Current period gross charge-offs, Loans Converted To Term Loans	1,080
Loan Charge-offs	3,432	2,983
Total	1,499,982		1,541,940
Commercial and industrial | Internal Grade 1-3 (Pass low risk)
Internal risk grades of non-covered loans
2025	6,014
2024	38,840
2023	9,926
2022	7,929
2021	12,808
2020 and Prior	3,075
Revolving	26,580
Total loans with credit quality measures	105,172
Commercial and industrial | Internal Grade 4-7 (Pass normal risk)
Internal risk grades of non-covered loans
2025	45,447
2024	70,973
2023	22,355
2022	48,035
2021	49,328
2020 and Prior	32,734
Revolving	289,111
Loans Converted To Term Loans	8,694
Total loans with credit quality measures	566,677
Commercial and industrial | Internal Grade 8-11 (Pass high risk and watch)
Internal risk grades of non-covered loans
2025	35,676
2024	112,705
2023	47,415
2022	43,080
2021	32,720
2020 and Prior	16,415
Revolving	194,869
Loans Converted To Term Loans	4,148
Total loans with credit quality measures	487,028
Commercial and industrial | Special Mention
Internal risk grades of non-covered loans
2024	32,264
2023	28
2020 and Prior	1,295
Revolving	216
Total loans with credit quality measures	33,803
Commercial and industrial | Internal Grade 13 (Substandard accrual)
Internal risk grades of non-covered loans
2024	5,436
2023	227
2022	2,261
2021	3,279
2020 and Prior	1,102
Revolving	4,742
Loans Converted To Term Loans	5,121
Total loans with credit quality measures	22,168
Commercial and industrial | Internal Grade 14 (Substandard non-accrual)
Internal risk grades of non-covered loans
2024	11,529
2023	7,629
2022	7,217
2021	1,689
2020 and Prior	147
Revolving	2,107
Loans Converted To Term Loans	21,669
Total loans with credit quality measures	51,987
Commercial and industrial | Mortgage Warehouse Lending
Internal risk grades of non-covered loans
Loans without credit quality measures	233,147
Construction and land development
Internal risk grades of non-covered loans
Total	889,941		866,245
Construction and land development | FICO Score, Less than 620
Internal risk grades of non-covered loans
2025	(2)
Total loans with credit quality measures	(2)
Construction and land development | FICO Score, 620 to 720
Internal risk grades of non-covered loans
2025	6
2024	992
2020 and Prior	806
Total loans with credit quality measures	1,804
Construction and land development | FICO Score, Greater than 720
Internal risk grades of non-covered loans
2025	871
2024	11,986
2021	117
2020 and Prior	46
Total loans with credit quality measures	13,020
Construction and land development | Other.
Internal risk grades of non-covered loans
2024	212
Total loans with credit quality measures	212
Construction and land development | Internal Grade 1-3 (Pass low risk)
Internal risk grades of non-covered loans
2025	3,433
2024	4,044
2022	2,676
2021	834
2020 and Prior	113
Total loans with credit quality measures	11,100
Construction and land development | Internal Grade 4-7 (Pass normal risk)
Internal risk grades of non-covered loans
2025	52,046
2024	193,589
2023	148,944
2022	64,818
2021	8,405
2020 and Prior	7,595
Revolving	8,089
Total loans with credit quality measures	483,486
Construction and land development | Internal Grade 8-11 (Pass high risk and watch)
Internal risk grades of non-covered loans
2025	42,110
2024	178,509
2023	106,291
2022	24,125
2021	5,702
2020 and Prior	3,304
Revolving	5,413
Total loans with credit quality measures	365,454
Construction and land development | Internal Grade 13 (Substandard accrual)
Internal risk grades of non-covered loans
2025	1,546
2024	8,771
2023	1,343
2022	149
Total loans with credit quality measures	11,809
Construction and land development | Internal Grade 14 (Substandard non-accrual)
Internal risk grades of non-covered loans
2024	1,451
2023	1,528
2022	82
2020 and Prior	(3)
Total loans with credit quality measures	3,058
1-4 family residential
Internal risk grades of non-covered loans
Total	1,840,008		1,792,602
1-4 family residential | FICO Score, Less than 620
Internal risk grades of non-covered loans
2025	111
2024	2,889
2023	617
2022	1,132
2021	436
2020 and Prior	18,023
Revolving	193
Total loans with credit quality measures	23,401
1-4 family residential | FICO Score, 620 to 720
Internal risk grades of non-covered loans
2025	7,591
2024	35,144
2023	23,155
2022	14,497
2021	12,018
2020 and Prior	30,000
Revolving	2,554
Loans Converted To Term Loans	471
Total loans with credit quality measures	125,430
1-4 family residential | FICO Score, Greater than 720
Internal risk grades of non-covered loans
2025	39,278
2024	156,395
2023	112,309
2022	472,493
2021	649,339
2020 and Prior	140,310
Revolving	2,701
Loans Converted To Term Loans	417
Total loans with credit quality measures	1,573,242
1-4 family residential | Substandard non-accrual
Internal risk grades of non-covered loans
2024	901
2023	1,104
2022	391
2021	1,091
2020 and Prior	7,706
Total loans with credit quality measures	11,193
1-4 family residential | Other.
Internal risk grades of non-covered loans
2025	25,217
2024	38,394
2023	12,867
2022	5,146
2020 and Prior	4,151
Revolving	759
Loans Converted To Term Loans	20,208
Total loans with credit quality measures	106,742
Consumer
Internal risk grades of non-covered loans
Current period gross charge-offs, 2024	47
Current period gross charge-offs, 2022	8
Current period gross charge-offs, Revolving	3
Current period gross charge-offs, Loans Converted To Term Loans	9
Loan Charge-offs	67	$ 81
Total	27,486		28,410
Consumer | FICO Score, Less than 620
Internal risk grades of non-covered loans
2025	250
2024	1,126
2023	107
2022	170
2021	17
2020 and Prior	44
Revolving	365
Loans Converted To Term Loans	8
Total loans with credit quality measures	2,087
Consumer | FICO Score, 620 to 720
Internal risk grades of non-covered loans
2025	1,513
2024	1,608
2023	880
2022	669
2021	79
2020 and Prior	64
Revolving	2,129
Loans Converted To Term Loans	20
Total loans with credit quality measures	6,962
Consumer | FICO Score, Greater than 720
Internal risk grades of non-covered loans
2025	962
2024	2,382
2023	1,576
2022	1,191
2021	361
2020 and Prior	79
Revolving	3,009
Loans Converted To Term Loans	12
Total loans with credit quality measures	9,572
Consumer | Other.
Internal risk grades of non-covered loans
2025	3,422
2024	4,498
2023	299
2022	305
2021	80
2020 and Prior	10
Revolving	251
Total loans with credit quality measures	8,865
Broker-dealer
Internal risk grades of non-covered loans
Loans without credit quality measures	324,223
Total	$ 324,223		$ 363,718