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Loans and Allowance for Credit Losses - Loans by Credit Risk Rating, Segregated by Class of Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 12,028,593 | $ 12,012,503
Loans other than pass or current |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 948,554 | 2,516,672
2021 | 2,682,134 | 1,525,310
2020 | 1,689,421 | 709,683
2019 | 556,351 | 656,367
2018 | 488,061 | 801,918
2017 and Prior | 1,263,445 | 1,081,384
Lines of Credit (“LOC”) Amortized Cost Basis | 4,371,014 | 4,431,020
LOC Converted to Term Loans Amortized Cost Basis | 29,613 | 290,149
Total | 12,028,593 | 12,012,503
Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 364,974 | 355,370
Consumer | Credit cards |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 184,372 | 187,052
Consumer | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 180,602 | 168,318
Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 9,228,990 | 9,167,250
Real Estate | Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 1,423,445 | 1,326,371
Real Estate | Construction and development | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 36,921 | 74,813
2021 | 83,202 | 83,729
2020 | 84,969 | 28,803
2019 | 21,988 | 17,349
2018 | 12,221 | 8,505
2017 and Prior | 10,831 | 9,319
Lines of Credit (“LOC”) Amortized Cost Basis | 1,166,464 | 1,074,617
LOC Converted to Term Loans Amortized Cost Basis | 3,694 | 20,285
Total | 1,420,290 | 1,317,420
Real Estate | Construction and development | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 270
2019 | 265 | 0
2018 | 0 | 0
2017 and Prior | 46 | 47
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 0
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 311 | 317
Real Estate | Construction and development | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 1,066 | 191
2021 | 184 | 77
2020 | 52 | 16
2019 | 15 | 54
2018 | 35 | 324
2017 and Prior | 123 | 423
Lines of Credit (“LOC”) Amortized Cost Basis | 1,369 | 5,598
LOC Converted to Term Loans Amortized Cost Basis | 0 | 1,951
Total | 2,844 | 8,634
Real Estate | Construction and development | Doubtful and loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 0
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 0 | 0
Real Estate | Construction and development | Risk rate 5, 6, and 7 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 37,987 | 75,004
2021 | 83,386 | 83,806
2020 | 85,021 | 29,089
2019 | 22,268 | 17,403
2018 | 12,256 | 8,829
2017 and Prior | 11,000 | 9,789
Lines of Credit (“LOC”) Amortized Cost Basis | 1,167,833 | 1,080,215
LOC Converted to Term Loans Amortized Cost Basis | 3,694 | 22,236
Total | 1,423,445 | 1,326,371
Real Estate | Single family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,042,978 | 2,101,975
Real Estate | Other commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 5,762,567 | 5,738,904
Real Estate | Other commercial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 512,084 | 1,349,746
2021 | 1,559,457 | 807,701
2020 | 917,510 | 375,824
2019 | 295,515 | 267,696
2018 | 176,517 | 476,029
2017 and Prior | 579,079 | 537,493
Lines of Credit (“LOC”) Amortized Cost Basis | 1,317,696 | 1,409,099
LOC Converted to Term Loans Amortized Cost Basis | 19,730 | 164,856
Total | 5,377,588 | 5,388,444
Real Estate | Other commercial | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 31,411 | 28,151
2021 | 11,572 | 30,981
2020 | 51,706 | 2,799
2019 | 1,241 | 6,650
2018 | 1,635 | 39,361
2017 and Prior | 9,511 | 4,801
Lines of Credit (“LOC”) Amortized Cost Basis | 65,879 | 38,638
LOC Converted to Term Loans Amortized Cost Basis | 0 | 1,608
Total | 172,955 | 152,989
Real Estate | Other commercial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 4,895 | 28,137
2021 | 67,793 | 10,186
2020 | 49,225 | 5,243
2019 | 3,416 | 10,806
2018 | 3,000 | 30,060
2017 and Prior | 30,247 | 27,107
Lines of Credit (“LOC”) Amortized Cost Basis | 53,448 | 53,860
LOC Converted to Term Loans Amortized Cost Basis | 0 | 32,072
Total | 212,024 | 197,471
Real Estate | Other commercial | Doubtful and loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 0
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 0 | 0
Real Estate | Other commercial | Risk rate 5, 6, and 7 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 548,390 | 1,406,034
2021 | 1,638,822 | 848,868
2020 | 1,018,441 | 383,866
2019 | 300,172 | 285,152
2018 | 181,152 | 545,450
2017 and Prior | 618,837 | 569,401
Lines of Credit (“LOC”) Amortized Cost Basis | 1,437,023 | 1,501,597
LOC Converted to Term Loans Amortized Cost Basis | 19,730 | 198,536
Total | 5,762,567 | 5,738,904
Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,166,870 | 2,160,760
Commercial | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,016,405 | 1,992,043
Commercial | Commercial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 171,244 | 455,499
2021 | 416,875 | 187,517
2020 | 204,615 | 80,486
2019 | 57,498 | 57,437
2018 | 43,756 | 36,529
2017 and Prior | 75,701 | 57,099
Lines of Credit (“LOC”) Amortized Cost Basis | 1,002,977 | 1,004,971
LOC Converted to Term Loans Amortized Cost Basis | 2,848 | 41,885
Total | 1,975,514 | 1,921,423
Commercial | Commercial | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 3,718 | 670
2021 | 1,373 | 2,482
2020 | 1,808 | 1,066
2019 | 112 | 189
2018 | 12 | 261
2017 and Prior | 1,038 | 2,770
Lines of Credit (“LOC”) Amortized Cost Basis | 3,803 | 8,500
LOC Converted to Term Loans Amortized Cost Basis | 0 | 10,499
Total | 11,864 | 26,437
Commercial | Commercial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 451 | 3,436
2021 | 6,913 | 18,381
2020 | 4,337 | 4,397
2019 | 1,540 | 1,196
2018 | 1,083 | 578
2017 and Prior | 2,899 | 850
Lines of Credit (“LOC”) Amortized Cost Basis | 11,603 | 8,242
LOC Converted to Term Loans Amortized Cost Basis | 201 | 7,103
Total | 29,027 | 44,183
Commercial | Commercial | Doubtful and loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 0
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 0 | 0
Commercial | Commercial | Risk rate 5, 6, and 7 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 175,413 | 459,605
2021 | 425,161 | 208,380
2020 | 210,760 | 85,949
2019 | 59,150 | 58,822
2018 | 44,851 | 37,368
2017 and Prior | 79,638 | 60,719
Lines of Credit (“LOC”) Amortized Cost Basis | 1,018,383 | 1,021,713
LOC Converted to Term Loans Amortized Cost Basis | 3,049 | 59,487
Total | 2,016,405 | 1,992,043
Commercial | Agricultural |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 150,465 | 168,717
Commercial | Agricultural | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 12,418 | 32,780
2021 | 31,654 | 20,230
2020 | 16,797 | 10,253
2019 | 7,300 | 3,646
2018 | 2,234 | 2,364
2017 and Prior | 1,987 | 459
Lines of Credit (“LOC”) Amortized Cost Basis | 76,716 | 98,245
LOC Converted to Term Loans Amortized Cost Basis | 1,059 | 327
Total | 150,165 | 168,304
Commercial | Agricultural | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 0
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 0 | 0
Commercial | Agricultural | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 191
2021 | 79 | 25
2020 | 0 | 27
2019 | 68 | 53
2018 | 39 | 22
2017 and Prior | 1 | 3
Lines of Credit (“LOC”) Amortized Cost Basis | 113 | 23
LOC Converted to Term Loans Amortized Cost Basis | 0 | 69
Total | 300 | 413
Commercial | Agricultural | Doubtful and loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 0
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 0 | 0
Commercial | Agricultural | Risk rate 5, 6, and 7 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 12,418 | 32,971
2021 | 31,733 | 20,255
2020 | 16,797 | 10,280
2019 | 7,368 | 3,699
2018 | 2,273 | 2,386
2017 and Prior | 1,988 | 462
Lines of Credit (“LOC”) Amortized Cost Basis | 76,829 | 98,268
LOC Converted to Term Loans Amortized Cost Basis | 1,059 | 396
Total | 150,465 | 168,717
Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 267,759 | 329,123
Current |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 11,968,315 | 11,958,874
Current | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 362,597 | 352,831
Current | Consumer | Credit cards |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 183,170 | 185,792
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 183,170 | 185,792
Current | Consumer | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 79,761 | 97,830
2021 | 43,528 | 21,885
2020 | 18,213 | 11,712
2019 | 8,773 | 6,756
2018 | 5,164 | 5,416
2017 and Prior | 6,467 | 3,833
Lines of Credit (“LOC”) Amortized Cost Basis | 17,517 | 19,607
LOC Converted to Term Loans Amortized Cost Basis | 4 | 0
Total | 179,427 | 167,039
Current | Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 9,184,207 | 9,131,179
Current | Real Estate | Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 1,422,901 | 1,325,753
Current | Real Estate | Single family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 94,349 | 419,605
2021 | 432,131 | 335,788
2020 | 331,902 | 185,190
2019 | 154,549 | 260,037
2018 | 217,889 | 193,110
2017 and Prior | 519,907 | 421,957
Lines of Credit (“LOC”) Amortized Cost Basis | 263,355 | 256,155
LOC Converted to Term Loans Amortized Cost Basis | 2,077 | 9,422
Total | 2,016,159 | 2,081,264
Current | Real Estate | Other commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 5,745,147 | 5,724,162
Current | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,153,772 | 2,145,744
Current | Commercial | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,003,616 | 1,977,157
Current | Commercial | Agricultural |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 150,156 | 168,587
Current | Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 28 | 24,247
2021 | 24,198 | 4,740
2020 | 4,616 | 1,236
2019 | 1,170 | 22,438
2018 | 22,241 | 6,692
2017 and Prior | 11,612 | 5,578
Lines of Credit (“LOC”) Amortized Cost Basis | 203,874 | 264,189
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 267,739 | 329,120
30-89 days past due | Consumer | Credit cards |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 840 | 847
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 840 | 847
30-89 days past due | Consumer | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 15 | 265
2021 | 476 | 121
2020 | 122 | 164
2019 | 90 | 49
2018 | 83 | 219
2017 and Prior | 245 | 156
Lines of Credit (“LOC”) Amortized Cost Basis | 52 | 175
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 1,083 | 1,149
30-89 days past due | Real Estate | Single family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 52 | 1,061
2021 | 2,445 | 883
2020 | 3,040 | 1,662
2019 | 2,010 | 791
2018 | 1,348 | 1,077
2017 and Prior | 8,189 | 4,360
Lines of Credit (“LOC”) Amortized Cost Basis | 1,189 | 1,479
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 18,273 | 11,313
30-89 days past due | Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 17 | 0
2018 | 0 | 0
2017 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 0
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 17 | 0
90+ days past due |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 29,145 | 32,907
90+ days past due | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 454 | 543
90+ days past due | Consumer | Credit cards |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 362 | 413
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 362 | 413
90+ days past due | Consumer | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 23
2021 | 31 | 23
2020 | 7 | 28
2019 | 9 | 21
2018 | 3 | 13
2017 and Prior | 42 | 22
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 0
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 92 | 130
90+ days past due | Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 20,407 | 22,170
90+ days past due | Real Estate | Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 118 | 504
90+ days past due | Real Estate | Single family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 141 | 27
2021 | 223 | 561
2020 | 502 | 507
2019 | 775 | 1,199
2018 | 801 | 1,358
2017 and Prior | 5,517 | 5,104
Lines of Credit (“LOC”) Amortized Cost Basis | 587 | 570
LOC Converted to Term Loans Amortized Cost Basis | 0 | 72
Total | 8,546 | 9,398
90+ days past due | Real Estate | Other commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 11,743 | 12,268
90+ days past due | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 8,281 | 10,191
90+ days past due | Commercial | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 8,082 | 10,074
90+ days past due | Commercial | Agricultural |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 199 | 117
90+ days past due | Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 and Prior | 3 | 3
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 0
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 3 | 3
30 + days past due | Consumer | Credit cards |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 184,372 | 187,052
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 184,372 | 187,052
30 + days past due | Consumer | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 79,776 | 98,118
2021 | 44,035 | 22,029
2020 | 18,342 | 11,904
2019 | 8,872 | 6,826
2018 | 5,250 | 5,648
2017 and Prior | 6,754 | 4,011
Lines of Credit (“LOC”) Amortized Cost Basis | 17,569 | 19,782
LOC Converted to Term Loans Amortized Cost Basis | 4 | 0
Total | 180,602 | 168,318
30 + days past due | Real Estate | Single family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 94,542 | 420,693
2021 | 434,799 | 337,232
2020 | 335,444 | 187,359
2019 | 157,334 | 262,027
2018 | 220,038 | 195,545
2017 and Prior | 533,613 | 431,421
Lines of Credit (“LOC”) Amortized Cost Basis | 265,131 | 258,204
LOC Converted to Term Loans Amortized Cost Basis | 2,077 | 9,494
Total | 2,042,978 | 2,101,975
30 + days past due | Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2022 (YTD) | 28 | 24,247
2021 | 24,198 | 4,740
2020 | 4,616 | 1,236
2019 | 1,187 | 22,438
2018 | 22,241 | 6,692
2017 and Prior | 11,615 | 5,581
Lines of Credit (“LOC”) Amortized Cost Basis | 203,874 | 264,189
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | $ 267,759 | $ 329,123

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- Definition Amount excluding accrued interest of financing receivable that can be withdrawn, repaid, and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
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