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Loans and Allowance for Credit Losses - Schedule of Risk Rating and Payment Performance (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | $ 28,336,244 | $ 13,601,846
Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 28,336,244 | 13,601,846
Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 8,624,253 | 3,391,769
Commercial | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 559,140 | 944,296
Originated one year before current year | 2,081,084 | 589,907
Originated two years before current year | 1,164,588 | 289,294
Originated three years before current year | 1,096,037 | 112,326
Originated four years before current year | 514,998 | 171,251
Originated more than five years before current fiscal year | 699,185 | 244,517
Revolving | 2,151,379 | 689,957
Revolving to Term | 168,262 | 158,664
Total loans | 8,434,673 | 3,200,212
Commercial real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 11,337,735 | 6,380,674
Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 694,077 | 1,596,481
Originated one year before current year | 2,944,906 | 1,514,176
Originated two years before current year | 2,309,678 | 898,738
Originated three years before current year | 1,662,093 | 492,535
Originated four years before current year | 1,089,150 | 516,592
Originated more than five years before current fiscal year | 1,839,460 | 666,606
Revolving | 120,593 | 45,215
Revolving to Term | 523,045 | 491,141
Total loans | 11,183,002 | 6,221,484
BBCC | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 21,519 | 83,314
Originated one year before current year | 79,601 | 71,056
Originated two years before current year | 65,956 | 55,784
Originated three years before current year | 51,027 | 36,019
Originated four years before current year | 31,553 | 25,366
Originated more than five years before current fiscal year | 26,877 | 9,133
Revolving | 45,884 | 48,344
Revolving to Term | 21,896 | 21,731
Total loans | 344,313 | 350,747
Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 261,002 | 625,678
Originated one year before current year | 1,923,890 | 632,870
Originated two years before current year | 1,944,084 | 272,766
Originated three years before current year | 537,009 | 73,116
Originated four years before current year | 155,272 | 104,721
Originated more than five years before current fiscal year | 877,459 | 546,021
Revolving | 7,338 | 12
Revolving to Term | 101 | 105
Total loans | 5,706,155 | 2,255,289
Residential real estate | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 5,706,155 | 2,255,289
Residential real estate | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 261,002 | 625,582
Originated one year before current year | 1,923,614 | 632,705
Originated two years before current year | 1,943,517 | 272,600
Originated three years before current year | 536,379 | 72,766
Originated four years before current year | 153,889 | 103,866
Originated more than five years before current fiscal year | 848,879 | 529,293
Revolving | 7,338 | 12
Revolving to Term | 101 | 105
Total loans | 5,674,719 | 2,236,929
Residential real estate | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 0 | 96
Originated one year before current year | 276 | 165
Originated two years before current year | 567 | 166
Originated three years before current year | 630 | 350
Originated four years before current year | 1,383 | 855
Originated more than five years before current fiscal year | 28,580 | 16,728
Revolving | 0 | 0
Revolving to Term | 0 | 0
Total loans | 31,436 | 18,360
Indirect |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 132,303 | 361,747
Originated one year before current year | 337,001 | 231,680
Originated two years before current year | 205,527 | 147,592
Originated three years before current year | 127,278 | 69,023
Originated four years before current year | 56,892 | 42,028
Originated more than five years before current fiscal year | 47,523 | 21,060
Revolving | 0 | 0
Revolving to Term | 2 | 9
Total loans | 906,526 | 873,139
Indirect | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 906,526 | 873,139
Indirect | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 132,303 | 361,485
Originated one year before current year | 336,662 | 231,156
Originated two years before current year | 205,006 | 146,978
Originated three years before current year | 126,786 | 68,513
Originated four years before current year | 56,493 | 41,598
Originated more than five years before current fiscal year | 46,887 | 20,819
Revolving | 0 | 0
Revolving to Term | 2 | 9
Total loans | 904,139 | 870,558
Indirect | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 0 | 262
Originated one year before current year | 339 | 524
Originated two years before current year | 521 | 614
Originated three years before current year | 492 | 510
Originated four years before current year | 399 | 430
Originated more than five years before current fiscal year | 636 | 241
Revolving | 0 | 0
Revolving to Term | 0 | 0
Total loans | 2,387 | 2,581
Direct |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 51,785 | 34,071
Originated one year before current year | 209,074 | 16,188
Originated two years before current year | 110,264 | 14,526
Originated three years before current year | 92,104 | 14,712
Originated four years before current year | 67,834 | 7,467
Originated more than five years before current fiscal year | 58,149 | 16,367
Revolving | 91,434 | 36,854
Revolving to Term | 46 | 200
Total loans | 680,690 | 140,385
Direct | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 680,690 | 140,385
Direct | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 51,785 | 34,058
Originated one year before current year | 208,885 | 16,135
Originated two years before current year | 110,180 | 14,396
Originated three years before current year | 91,848 | 14,579
Originated four years before current year | 67,637 | 7,432
Originated more than five years before current fiscal year | 57,716 | 15,831
Revolving | 91,394 | 36,812
Revolving to Term | 42 | 192
Total loans | 679,487 | 139,435
Direct | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 0 | 13
Originated one year before current year | 189 | 53
Originated two years before current year | 84 | 130
Originated three years before current year | 256 | 133
Originated four years before current year | 197 | 35
Originated more than five years before current fiscal year | 433 | 536
Revolving | 40 | 42
Revolving to Term | 4 | 8
Total loans | 1,203 | 950
Home equity |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 4,319 | 0
Originated one year before current year | 12,708 | 0
Originated two years before current year | 8,486 | 649
Originated three years before current year | 18,107 | 358
Originated four years before current year | 15,677 | 576
Originated more than five years before current fiscal year | 54,175 | 1
Revolving | 947,743 | 539,315
Revolving to Term | 19,670 | 19,691
Total loans | 1,080,885 | 560,590
Home equity | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total loans | 1,080,885 | 560,590
Home equity | Performing |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 4,106 | 0
Originated one year before current year | 12,367 | 0
Originated two years before current year | 8,145 | 633
Originated three years before current year | 17,441 | 349
Originated four years before current year | 14,323 | 535
Originated more than five years before current fiscal year | 47,692 | 0
Revolving | 947,382 | 539,057
Revolving to Term | 16,663 | 16,768
Total loans | 1,068,119 | 557,342
Home equity | Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 213 | 0
Originated one year before current year | 341 | 0
Originated two years before current year | 341 | 16
Originated three years before current year | 666 | 9
Originated four years before current year | 1,354 | 41
Originated more than five years before current fiscal year | 6,483 | 1
Revolving | 361 | 258
Revolving to Term | 3,007 | 2,923
Total loans | 12,766 | 3,248
Pass | Commercial | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 529,094 | 918,456
Originated one year before current year | 2,006,908 | 563,869
Originated two years before current year | 1,118,822 | 271,158
Originated three years before current year | 1,010,657 | 98,468
Originated four years before current year | 464,275 | 156,136
Originated more than five years before current fiscal year | 653,504 | 235,639
Revolving | 2,047,370 | 667,628
Revolving to Term | 140,617 | 130,470
Total loans | 7,971,247 | 3,041,824
Pass | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 650,646 | 1,555,880
Originated one year before current year | 2,778,302 | 1,474,271
Originated two years before current year | 2,236,175 | 846,921
Originated three years before current year | 1,553,009 | 481,508
Originated four years before current year | 958,205 | 462,176
Originated more than five years before current fiscal year | 1,672,138 | 611,680
Revolving | 117,993 | 42,609
Revolving to Term | 483,920 | 451,544
Total loans | 10,450,388 | 5,926,589
Pass | BBCC | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 21,151 | 81,710
Originated one year before current year | 77,808 | 69,749
Originated two years before current year | 64,413 | 54,580
Originated three years before current year | 49,309 | 34,461
Originated four years before current year | 30,895 | 25,113
Originated more than five years before current fiscal year | 26,428 | 8,296
Revolving | 45,160 | 47,571
Revolving to Term | 19,025 | 18,778
Total loans | 334,189 | 340,258
Criticized | Commercial | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 4,190 | 9,998
Originated one year before current year | 26,183 | 7,885
Originated two years before current year | 17,198 | 6,660
Originated three years before current year | 32,638 | 0
Originated four years before current year | 18,458 | 7,809
Originated more than five years before current fiscal year | 20,190 | 2,658
Revolving | 68,124 | 14,601
Revolving to Term | 1,955 | 10,076
Total loans | 188,936 | 59,687
Criticized | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 36,934 | 27,622
Originated one year before current year | 49,341 | 24,790
Originated two years before current year | 35,471 | 39,914
Originated three years before current year | 56,892 | 0
Originated four years before current year | 59,254 | 21,614
Originated more than five years before current fiscal year | 40,428 | 22,157
Revolving | 0 | 0
Revolving to Term | 34,058 | 34,387
Total loans | 312,378 | 170,484
Criticized | BBCC | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 343 | 1,320
Originated one year before current year | 1,493 | 1,170
Originated two years before current year | 1,315 | 841
Originated three years before current year | 777 | 160
Originated four years before current year | 207 | 0
Originated more than five years before current fiscal year | 0 | 0
Revolving | 488 | 670
Revolving to Term | 1,752 | 1,578
Total loans | 6,375 | 5,739
Substandard | Commercial | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 25,856 | 14,773
Originated one year before current year | 43,839 | 14,468
Originated two years before current year | 22,160 | 10,200
Originated three years before current year | 48,825 | 9,849
Originated four years before current year | 28,063 | 5,521
Originated more than five years before current fiscal year | 12,127 | 945
Revolving | 28,989 | 6,883
Revolving to Term | 19,315 | 10,322
Total loans | 229,174 | 72,961
Substandard | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 6,497 | 4,706
Originated one year before current year | 67,687 | 12,118
Originated two years before current year | 28,372 | 9,933
Originated three years before current year | 50,652 | 9,058
Originated four years before current year | 62,504 | 18,165
Originated more than five years before current fiscal year | 65,373 | 11,351
Revolving | 2,291 | 2,291
Revolving to Term | 4,258 | 4,339
Total loans | 287,634 | 71,961
Substandard | BBCC | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 25 | 284
Originated one year before current year | 280 | 24
Originated two years before current year | 0 | 79
Originated three years before current year | 546 | 7
Originated four years before current year | 16 | 187
Originated more than five years before current fiscal year | 161 | 465
Revolving | 236 | 103
Revolving to Term | 270 | 239
Total loans | 1,534 | 1,388
Nonaccrual | Commercial | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 0 | 1,069
Originated one year before current year | 2,416 | 3,507
Originated two years before current year | 4,280 | 1,276
Originated three years before current year | 3,039 | 3,721
Originated four years before current year | 1,244 | 1,448
Originated more than five years before current fiscal year | 9,599 | 0
Revolving | 3,233 | 845
Revolving to Term | 6,375 | 7,796
Total loans | 30,186 | 19,662
Nonaccrual | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 0 | 1,620
Originated one year before current year | 8,197 | 2,997
Originated two years before current year | 4,842 | 0
Originated three years before current year | (1) | 1,627
Originated four years before current year | 1,393 | 3,419
Originated more than five years before current fiscal year | 10,661 | 8,905
Revolving | 309 | 315
Revolving to Term | 809 | 871
Total loans | 26,210 | 19,754
Nonaccrual | BBCC | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 0 | 0
Originated one year before current year | 20 | 88
Originated two years before current year | 203 | 0
Originated three years before current year | 0 | 0
Originated four years before current year | 71 | 66
Originated more than five years before current fiscal year | 0 | 162
Revolving | 0 | 0
Revolving to Term | 849 | 1,136
Total loans | 1,143 | 1,452
Doubtful | Commercial | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 0 | 0
Originated one year before current year | 1,738 | 178
Originated two years before current year | 2,128 | 0
Originated three years before current year | 878 | 288
Originated four years before current year | 2,958 | 337
Originated more than five years before current fiscal year | 3,765 | 5,275
Revolving | 3,663 | 0
Revolving to Term | 0 | 0
Total loans | 15,130 | 6,078
Doubtful | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 0 | 6,653
Originated one year before current year | 41,379 | 0
Originated two years before current year | 4,818 | 1,970
Originated three years before current year | 1,541 | 342
Originated four years before current year | 7,794 | 11,218
Originated more than five years before current fiscal year | 50,860 | 12,513
Revolving | 0 | 0
Revolving to Term | 0 | 0
Total loans | 106,392 | 32,696
Doubtful | BBCC | Segment Portfolio Reclassification, Adjusted Balance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Originated in current fiscal year | 0 | 0
Originated one year before current year | 0 | 25
Originated two years before current year | 25 | 284
Originated three years before current year | 395 | 1,391
Originated four years before current year | 364 | 0
Originated more than five years before current fiscal year | 288 | 210
Revolving | 0 | 0
Revolving to Term | 0 | 0
Total loans | $ 1,072 | $ 1,910

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