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Loans and Allowance for Credit Losses - Loans by Credit Risk Rating, Segregated by Class of Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 12,012,503 | $ 12,900,897
Loans other than pass or current |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 2,516,672 | 3,682,340
2020 | 1,525,310 | 1,019,712
2019 | 709,683 | 922,657
2018 | 656,367 | 913,379
2017 | 801,918 | 658,250
2016 and Prior | 1,081,384 | 612,237
Lines of Credit (“LOC”) Amortized Cost Basis | 4,431,020 | 4,725,168
LOC Converted to Term Loans Amortized Cost Basis | 290,149 | 367,154
Total | 12,012,503 | 12,900,897
Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 355,370 | 391,224
Consumer | Credit cards |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 187,052 | 188,845
Consumer | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 168,318 | 202,379
Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 9,167,250 | 9,223,791
Real Estate | Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 1,326,371 | 1,596,255
Real Estate | Construction and development | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 74,813 | 165,990
2020 | 83,729 | 35,989
2019 | 28,803 | 31,279
2018 | 17,349 | 15,960
2017 | 8,505 | 9,233
2016 and Prior | 9,319 | 4,807
Lines of Credit (“LOC”) Amortized Cost Basis | 1,074,617 | 1,272,870
LOC Converted to Term Loans Amortized Cost Basis | 20,285 | 23,251
Total | 1,317,420 | 1,559,379
Real Estate | Construction and development | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 2,728
2020 | 0 | 344
2019 | 270 | 259
2018 | 0 | 2,107
2017 | 0 | 19
2016 and Prior | 47 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 9,613
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 317 | 15,070
Real Estate | Construction and development | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 191 | 294
2020 | 77 | 2,069
2019 | 16 | 404
2018 | 54 | 449
2017 | 324 | 342
2016 and Prior | 423 | 320
Lines of Credit (“LOC”) Amortized Cost Basis | 5,598 | 17,914
LOC Converted to Term Loans Amortized Cost Basis | 1,951 | 14
Total | 8,634 | 21,806
Real Estate | Construction and development | Doubtful and loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
2016 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] |  |
2021 | 75,004 | 169,012
2020 | 83,806 | 38,402
2019 | 29,089 | 31,942
2018 | 17,403 | 18,516
2017 | 8,829 | 9,594
2016 and Prior | 9,789 | 5,127
Lines of Credit (“LOC”) Amortized Cost Basis | 1,080,215 | 1,300,397
LOC Converted to Term Loans Amortized Cost Basis | 22,236 | 23,265
Total | 1,326,371 | 1,596,255
Real Estate | Single family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,101,975 | 1,880,673
Real Estate | Other commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 5,738,904 | 5,746,863
Real Estate | Other commercial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 1,349,746 | 1,563,245
2020 | 807,701 | 525,750
2019 | 375,824 | 375,303
2018 | 267,696 | 518,534
2017 | 476,029 | 372,679
2016 and Prior | 537,493 | 284,098
Lines of Credit (“LOC”) Amortized Cost Basis | 1,409,099 | 1,445,428
LOC Converted to Term Loans Amortized Cost Basis | 164,856 | 181,949
Total | 5,388,444 | 5,266,986
Real Estate | Other commercial | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 28,151 | 100,085
2020 | 30,981 | 4,346
2019 | 2,799 | 10,738
2018 | 6,650 | 19,943
2017 | 39,361 | 26,245
2016 and Prior | 4,801 | 10,608
Lines of Credit (“LOC”) Amortized Cost Basis | 38,638 | 63,305
LOC Converted to Term Loans Amortized Cost Basis | 1,608 | 23,435
Total | 152,989 | 258,705
Real Estate | Other commercial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 28,137 | 66,737
2020 | 10,186 | 9,418
2019 | 5,243 | 24,380
2018 | 10,806 | 14,067
2017 | 30,060 | 3,744
2016 and Prior | 27,107 | 11,158
Lines of Credit (“LOC”) Amortized Cost Basis | 53,860 | 52,182
LOC Converted to Term Loans Amortized Cost Basis | 32,072 | 39,486
Total | 197,471 | 221,172
Real Estate | Other commercial | Doubtful and loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
2016 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] |  |
2021 | 1,406,034 | 1,730,067
2020 | 848,868 | 539,514
2019 | 383,866 | 410,421
2018 | 285,152 | 552,544
2017 | 545,450 | 402,668
2016 and Prior | 569,401 | 305,864
Lines of Credit (“LOC”) Amortized Cost Basis | 1,501,597 | 1,560,915
LOC Converted to Term Loans Amortized Cost Basis | 198,536 | 244,870
Total | 5,738,904 | 5,746,863
Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,160,760 | 2,750,291
Commercial | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 1,992,043 | 2,574,386
Commercial | Commercial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 455,499 | 1,168,085
2020 | 187,517 | 154,740
2019 | 80,486 | 110,383
2018 | 57,437 | 65,757
2017 | 36,529 | 35,198
2016 and Prior | 57,099 | 45,568
Lines of Credit (“LOC”) Amortized Cost Basis | 1,004,971 | 803,751
LOC Converted to Term Loans Amortized Cost Basis | 41,885 | 56,648
Total | 1,921,423 | 2,440,130
Commercial | Commercial | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 670 | 5,707
2020 | 2,482 | 342
2019 | 1,066 | 465
2018 | 189 | 972
2017 | 261 | 54
2016 and Prior | 2,770 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 8,500 | 12,318
LOC Converted to Term Loans Amortized Cost Basis | 10,499 | 22,546
Total | 26,437 | 42,404
Commercial | Commercial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 3,436 | 23,227
2020 | 18,381 | 4,495
2019 | 4,397 | 1,586
2018 | 1,196 | 730
2017 | 578 | 276
2016 and Prior | 850 | 334
Lines of Credit (“LOC”) Amortized Cost Basis | 8,242 | 53,682
LOC Converted to Term Loans Amortized Cost Basis | 7,103 | 7,522
Total | 44,183 | 91,852
Commercial | Commercial | Doubtful and loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
2016 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] |  |
2021 | 459,605 | 1,197,019
2020 | 208,380 | 159,577
2019 | 85,949 | 112,434
2018 | 58,822 | 67,459
2017 | 37,368 | 35,528
2016 and Prior | 60,719 | 45,902
Lines of Credit (“LOC”) Amortized Cost Basis | 1,021,713 | 869,751
LOC Converted to Term Loans Amortized Cost Basis | 59,487 | 86,716
Total | 1,992,043 | 2,574,386
Commercial | Agricultural |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 168,717 | 175,905
Commercial | Agricultural | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 32,780 | 36,128
2020 | 20,230 | 19,144
2019 | 10,253 | 10,014
2018 | 3,646 | 4,671
2017 | 2,364 | 1,916
2016 and Prior | 459 | 340
Lines of Credit (“LOC”) Amortized Cost Basis | 98,245 | 101,238
LOC Converted to Term Loans Amortized Cost Basis | 327 | 1,560
Total | 168,304 | 175,011
Commercial | Agricultural | Special mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 0
2020 | 0 | 79
2019 | 0 | 13
2018 | 0 | 299
2017 | 0 | 0
2016 and Prior | 0 | 6
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 34
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 0 | 431
Commercial | Agricultural | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 191 | 86
2020 | 25 | 101
2019 | 27 | 64
2018 | 53 | 47
2017 | 22 | 12
2016 and Prior | 3 | 10
Lines of Credit (“LOC”) Amortized Cost Basis | 23 | 68
LOC Converted to Term Loans Amortized Cost Basis | 69 | 75
Total | 413 | 463
Commercial | Agricultural | Doubtful and loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
2016 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] |  |
2021 | 32,971 | 36,214
2020 | 20,255 | 19,324
2019 | 10,280 | 10,091
2018 | 3,699 | 5,017
2017 | 2,386 | 1,928
2016 and Prior | 462 | 356
Lines of Credit (“LOC”) Amortized Cost Basis | 98,268 | 101,340
LOC Converted to Term Loans Amortized Cost Basis | 396 | 1,635
Total | 168,717 | 175,905
Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 329,123 | 535,591
Current |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 11,958,874 | 12,826,637
Current | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 352,831 | 387,187
Current | Consumer | Credit cards |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
2016 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 185,792 | 187,881
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 185,792 | 187,881
Current | Consumer | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 97,830 | 69,334
2020 | 21,885 | 44,215
2019 | 11,712 | 27,525
2018 | 6,756 | 21,995
2017 | 5,416 | 19,023
2016 and Prior | 3,833 | 2,530
Lines of Credit (“LOC”) Amortized Cost Basis | 19,607 | 14,684
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 167,039 | 199,306
Current | Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 9,131,179 | 9,169,016
Current | Real Estate | Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 1,325,753 | 1,591,791
Current | Real Estate | Single family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 419,605 | 473,340
2020 | 335,788 | 209,810
2019 | 185,190 | 297,308
2018 | 260,037 | 235,429
2017 | 193,110 | 183,229
2016 and Prior | 421,957 | 236,395
Lines of Credit (“LOC”) Amortized Cost Basis | 256,155 | 196,505
LOC Converted to Term Loans Amortized Cost Basis | 9,422 | 10,592
Total | 2,081,264 | 1,842,608
Current | Real Estate | Other commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 5,724,162 | 5,734,617
Current | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,145,744 | 2,734,935
Current | Commercial | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 1,977,157 | 2,559,443
Current | Commercial | Agricultural |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 168,587 | 175,492
Current | Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 24,247 | 125
2020 | 4,740 | 4,260
2019 | 1,236 | 27,256
2018 | 22,438 | 6,489
2017 | 6,692 | 2,628
2016 and Prior | 5,578 | 6,065
Lines of Credit (“LOC”) Amortized Cost Basis | 264,189 | 488,676
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 329,120 | 535,499
30-89 days past due | Consumer | Credit cards |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
2016 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 847 | 708
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 847 | 708
30-89 days past due | Consumer | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 265 | 234
2020 | 121 | 441
2019 | 164 | 327
2018 | 49 | 658
2017 | 219 | 689
2016 and Prior | 156 | 84
Lines of Credit (“LOC”) Amortized Cost Basis | 175 | 338
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 1,149 | 2,771
30-89 days past due | Real Estate | Single family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 1,061 | 6,300
2020 | 883 | 2,258
2019 | 1,662 | 2,593
2018 | 791 | 2,610
2017 | 1,077 | 2,058
2016 and Prior | 4,360 | 6,050
Lines of Credit (“LOC”) Amortized Cost Basis | 1,479 | 1,781
LOC Converted to Term Loans Amortized Cost Basis | 0 | 76
Total | 11,313 | 23,726
30-89 days past due | Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 59
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 33
2016 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 | 92
90+ days past due |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 32,907 | 35,188
90+ days past due | Consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 543 | 558
90+ days past due | Consumer | Credit cards |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
2016 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 413 | 256
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 413 | 256
90+ days past due | Consumer | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 23 | 79
2020 | 23 | 58
2019 | 28 | 25
2018 | 21 | 80
2017 | 13 | 40
2016 and Prior | 22 | 12
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 8
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 130 | 302
90+ days past due | Real Estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 22,170 | 27,014
90+ days past due | Real Estate | Construction and development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 504 | 3,089
90+ days past due | Real Estate | Single family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 27 | 557
2020 | 561 | 1,853
2019 | 507 | 2,735
2018 | 1,199 | 2,582
2017 | 1,358 | 832
2016 and Prior | 5,104 | 3,852
Lines of Credit (“LOC”) Amortized Cost Basis | 570 | 1,928
LOC Converted to Term Loans Amortized Cost Basis | 72 | 0
Total | 9,398 | 14,339
90+ days past due | Real Estate | Other commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 12,268 | 9,586
90+ days past due | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 10,191 | 7,616
90+ days past due | Commercial | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 10,074 | 7,429
90+ days past due | Commercial | Agricultural |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 117 | 187
90+ days past due | Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
2016 and Prior | 3 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 0 | 0
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 3 | 0
30 + days past due | Consumer | Credit cards |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
2016 and Prior | 0 | 0
Lines of Credit (“LOC”) Amortized Cost Basis | 187,052 | 188,845
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 187,052 | 188,845
30 + days past due | Consumer | Other consumer |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 98,118 | 69,647
2020 | 22,029 | 44,714
2019 | 11,904 | 27,877
2018 | 6,826 | 22,733
2017 | 5,648 | 19,752
2016 and Prior | 4,011 | 2,626
Lines of Credit (“LOC”) Amortized Cost Basis | 19,782 | 15,030
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | 168,318 | 202,379
30 + days past due | Real Estate | Single family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 420,693 | 480,197
2020 | 337,232 | 213,921
2019 | 187,359 | 302,636
2018 | 262,027 | 240,621
2017 | 195,545 | 186,119
2016 and Prior | 431,421 | 246,297
Lines of Credit (“LOC”) Amortized Cost Basis | 258,204 | 200,214
LOC Converted to Term Loans Amortized Cost Basis | 9,494 | 10,668
Total | 2,101,975 | 1,880,673
30 + days past due | Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2021 | 24,247 | 184
2020 | 4,740 | 4,260
2019 | 1,236 | 27,256
2018 | 22,438 | 6,489
2017 | 6,692 | 2,661
2016 and Prior | 5,581 | 6,065
Lines of Credit (“LOC”) Amortized Cost Basis | 264,189 | 488,676
LOC Converted to Term Loans Amortized Cost Basis | 0 | 0
Total | $ 329,123 | $ 535,591

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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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