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Allowance for Credit Losses (Tables) | 12 Months Ended
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Dec. 31, 2020
Receivables [Abstract] |
Allowance for Credit Losses | Activity in the allowance for credit losses by class of loans is summarized as follows:
| Year ended December 31, 2020
(Dollars in thousands) | Construction and land development - commercial |  | Owner occupied commercial mortgage |  | Non-owner occupied commercial mortgage |  | Commercial and industrial and leases |  | Residential mortgage |  | Revolving mortgage |  | Construction and land development - consumer |  | Consumer auto |  | Consumer other |  | PCD |  | Total
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2019 | $ | 33,213 |  |  | $ | 36,444 |  |  | $ | 11,102 |  |  | $ | 61,610 |  |  | $ | 18,232 |  |  | $ | 19,702 |  |  | $ | 2,709 |  |  | $ | 4,292 |  |  | $ | 30,301 |  |  | $ | 7,536 |  |  | $ | 225,141 |
Adoption of ASC 326 | (31,061) |  |  | (19,316) |  |  | 460 |  |  | (37,637) |  |  | 17,118 |  |  | 3,665 |  |  | (1,291) |  |  | 1,100 |  |  | 10,037 |  |  | 19,001 |  |  | (37,924) |
Balance at January 1, 2020 | 2,152 |  |  | 17,128 |  |  | 11,562 |  |  | 23,973 |  |  | 35,350 |  |  | 23,367 |  |  | 1,418 |  |  | 5,392 |  |  | 40,338 |  |  | 26,537 |  |  | 187,217 |
Provision (credits) | 4,301 |  |  | 6,729 |  |  | 12,917 |  |  | 13,816 |  |  | 9,684 |  |  | 1,134 |  |  | 266 |  |  | 6,297 |  |  | 10,410 |  |  | (7,202) |  |  | 58,352 |
Initial allowance on PCD loans | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,193 |  |  | 1,193 |
Charge-offs | (138) |  |  | (593) |  |  | (1,951) |  |  | (14,904) |  |  | (1,653) |  |  | (1,662) |  |  | (70) |  |  | (3,646) |  |  | (17,188) |  |  | (3,300) |  |  | (45,105) |
Recoveries | 431 |  |  | 401 |  |  | 124 |  |  | 4,894 |  |  | 717 |  |  | 1,918 |  |  | 117 |  |  | 1,417 |  |  | 5,879 |  |  | 6,759 |  |  | 22,657 |
Balance at December 31, 2020 | $ | 6,746 |  |  | $ | 23,665 |  |  | $ | 22,652 |  |  | $ | 27,779 |  |  | $ | 44,098 |  |  | $ | 24,757 |  |  | $ | 1,731 |  |  | $ | 9,460 |  |  | $ | 39,439 |  |  | $ | 23,987 |  |  | $ | 224,314 |
| Years ended December 31, 2019 and 2018
(Dollars in thousands) | Construction and land development - commercial |  | Commercial mortgage |  | Other commercial real estate |  | Commercial and industrial and leases |  | Other |  | Residential mortgage |  | Revolving mortgage |  | Construction and land development - non- commercial |  | Consumer |  | PCI |  | Total
Allowance for credit losses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2018 | $ | 24,470 |  |  | $ | 45,005 |  |  | $ | 4,571 |  |  | $ | 59,824 |  |  | $ | 4,689 |  |  | $ | 15,706 |  |  | $ | 22,436 |  |  | $ | 3,962 |  |  | $ | 31,204 |  |  | $ | 10,026 |  |  | $ | 221,893 |
Provision (credits) | 10,533 |  |  | (1,490) |  |  | (2,171) |  |  | 2,511 |  |  | (2,827) |  |  | 897 |  |  | 1,112 |  |  | (1,520) |  |  | 22,187 |  |  | (765) |  |  | 28,467 |
Charge-offs | (44) |  |  | (1,140) |  |  | (69) |  |  | (10,211) |  |  | (130) |  |  | (1,689) |  |  | (3,235) |  |  | (219) |  |  | (22,817) |  |  | (117) |  |  | (39,671) |
Recoveries | 311 |  |  | 1,076 |  |  | 150 |  |  | 3,496 |  |  | 489 |  |  | 558 |  |  | 1,549 |  |  | 127 |  |  | 5,267 |  |  | — |  |  | 13,023 |
Balance at December 31, 2018 | 35,270 |  |  | 43,451 |  |  | 2,481 |  |  | 55,620 |  |  | 2,221 |  |  | 15,472 |  |  | 21,862 |  |  | 2,350 |  |  | 35,841 |  |  | 9,144 |  |  | 223,712 |
Provision (credits) | (2,171) |  |  | 2,384 |  |  | (285) |  |  | 14,212 |  |  | (754) |  |  | 3,481 |  |  | (788) |  |  | 359 |  |  | 16,611 |  |  | (1,608) |  |  | 31,441 |
Charge-offs | (196) |  |  | (1,096) |  |  | — |  |  | (13,352) |  |  | (100) |  |  | (1,137) |  |  | (2,584) |  |  | — |  |  | (24,562) |  |  | — |  |  | (43,027) |
Recoveries | 310 |  |  | 596 |  |  | 15 |  |  | 2,894 |  |  | 869 |  |  | 416 |  |  | 1,212 |  |  | — |  |  | 6,703 |  |  | — |  |  | 13,015 |
Balance at December 31, 2019 | $ | 33,213 |  |  | $ | 45,335 |  |  | $ | 2,211 |  |  | $ | 59,374 |  |  | $ | 2,236 |  |  | $ | 18,232 |  |  | $ | 19,702 |  |  | $ | 2,709 |  |  | $ | 34,593 |  |  | $ | 7,536 |  |  | $ | 225,141 |
Activity in the allowance for credit losses for unfunded commitments is summarized as follows:
(Dollars in thousands) | Year ended December 31, 2020
Allowance for credit losses: |
Balance at December 31, 2019 | $ | 1,055 |
Adoption of ASC 326 | 8,885 |
Balance at January 1, 2020 | $ | 9,940 |
Provision | 2,874 |
Balance at December 31, 2020 | 12,814 |
The following table presents information on collateral-dependent loans by class and includes the amortized cost of collateral-dependent loans and leases, the net realizable value of the collateral, the extent to which collateral secures collateral-dependent loans and the associated ACL as of December 31, 2020 were as follows:
(Dollars in thousands) | Collateral-Dependant Loans |  | Net Realizable Value of Collateral |  | Collateral Coverage |  | Allowance for Credit Losses
Commercial loans: |  |  |  |  |  |  |
Construction and land development | $ | 1,424 |  |  | $ | 1,795 |  |  | 126.1 | % |  | $ | — |
Owner occupied commercial mortgage | 9,792 |  |  | 14,253 |  |  | 145.6 |  |  | — |
Non-owner occupied commercial mortgage | 5,556 |  |  | 7,577 |  |  | 136.4 |  |  | — |
Total commercial loans | 16,772 |  |  | 23,625 |  |  | 140.9 |  |  | — |
Consumer: |  |  |  |  |  |  |
Residential mortgage | 23,011 |  |  | 29,775 |  |  | 129.4 |  |  | 131 |
Total non-PCD loans | 39,783 |  |  | 53,400 |  |  | 134.2 |  |  | 131 |
PCD | 19,042 |  |  | 27,872 |  |  | 146.4 |  |  | — |
Total collateral-dependent loans | $ | 58,825 |  |  | $ | 81,272 |  |  | 138.2 | % |  | $ | 131 |
The following tables present the allowance and recorded investment in loans and leases by class of loans, as well as the associated impairment method at December 31, 2019.
| December 31, 2019
(Dollars in thousands) | Construction and land development - commercial |  | Commercial mortgage |  | Other commercial real estate |  | Commercial and industrial and leases |  | Other |  | Residential mortgage |  | Revolving mortgage |  | Construction and land development - non-commercial |  | Consumer |  | Total
Non-PCI Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan and lease losses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ALLL for loans and leases individually evaluated for impairment | $ | 463 |  |  | $ | 3,650 |  |  | $ | 39 |  |  | $ | 1,379 |  |  | $ | 103 |  |  | $ | 3,278 |  |  | $ | 2,722 |  |  | $ | 174 |  |  | $ | 1,107 |  |  | $ | 12,915 |
ALLL for loans and leases collectively evaluated for impairment | 32,750 |  |  | 41,685 |  |  | 2,172 |  |  | 57,995 |  |  | 2,133 |  |  | 14,954 |  |  | 16,980 |  |  | 2,535 |  |  | 33,486 |  |  | 204,690 |
Total allowance for loan and lease losses | $ | 33,213 |  |  | $ | 45,335 |  |  | $ | 2,211 |  |  | $ | 59,374 |  |  | $ | 2,236 |  |  | $ | 18,232 |  |  | $ | 19,702 |  |  | $ | 2,709 |  |  | $ | 34,593 |  |  | $ | 217,605 |
Loans and leases: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans and leases individually evaluated for impairment | $ | 4,655 |  |  | $ | 70,149 |  |  | $ | 1,268 |  |  | $ | 12,182 |  |  | $ | 639 |  |  | $ | 60,442 |  |  | $ | 28,869 |  |  | $ | 3,882 |  |  | $ | 3,513 |  |  | $ | 185,599 |
Loans and leases collectively evaluated for impairment | 1,008,799 |  |  | 12,212,486 |  |  | 540,760 |  |  | 4,391,610 |  |  | 309,454 |  |  | 5,233,475 |  |  | 2,310,203 |  |  | 353,503 |  |  | 1,776,891 |  |  | 28,137,181 |
Total loan and leases | $ | 1,013,454 |  |  | $ | 12,282,635 |  |  | $ | 542,028 |  |  | $ | 4,403,792 |  |  | $ | 310,093 |  |  | $ | 5,293,917 |  |  | $ | 2,339,072 |  |  | $ | 357,385 |  |  | $ | 1,780,404 |  |  | $ | 28,322,780 |
The following tables present the recorded investment and related allowance in non-PCI impaired loans and leases by class of loans, as well as the unpaid principle balance.
| December 31, 2019
(Dollars in thousands) | With a recorded allowance |  | With no recorded allowance |  | Total |  | Unpaid principal balance |  | Related allowance recorded
Non-PCI impaired loans and leases |  |  |  |  |  |  |  |  |
Commercial: |  |  |  |  |  |  |  |  |
Construction and land development | $ | 1,851 |  |  | $ | 2,804 |  |  | $ | 4,655 |  |  | $ | 5,109 |  |  | $ | 463 |
Commercial mortgage | 42,394 |  |  | 27,755 |  |  | 70,149 |  |  | 74,804 |  |  | 3,650 |
Other commercial real estate | 318 |  |  | 950 |  |  | 1,268 |  |  | 1,360 |  |  | 39 |
Commercial and industrial and leases | 7,547 |  |  | 4,635 |  |  | 12,182 |  |  | 13,993 |  |  | 1,379 |
Other | 406 |  |  | 233 |  |  | 639 |  |  | 661 |  |  | 103 |
Total commercial loans | 52,516 |  |  | 36,377 |  |  | 88,893 |  |  | 95,927 |  |  | 5,634 |
Noncommercial: |  |  |  |  |  |  |  |  |
Residential mortgage | 48,796 |  |  | 11,646 |  |  | 60,442 |  |  | 64,741 |  |  | 3,278 |
Revolving mortgage | 26,104 |  |  | 2,765 |  |  | 28,869 |  |  | 31,960 |  |  | 2,722 |
Construction and land development | 2,470 |  |  | 1,412 |  |  | 3,882 |  |  | 4,150 |  |  | 174 |
Consumer | 3,472 |  |  | 41 |  |  | 3,513 |  |  | 3,821 |  |  | 1,107 |
Total noncommercial loans | 80,842 |  |  | 15,864 |  |  | 96,706 |  |  | 104,672 |  |  | 7,281 |
Total non-PCI impaired loans and leases | $ | 133,358 |  |  | $ | 52,241 |  |  | $ | 185,599 |  |  | $ | 200,599 |  |  | $ | 12,915 |
The following tables show the average non-PCI impaired loan balance and the interest income recognized by loan class for the years ended December 31, 2019 and 2018:
|  |  | 2019 |  | 2018
(Dollars in thousands) |  |  |  |  | Average Balance |  | Interest Income Recognized |  | Average Balance |  | Interest Income Recognized
Non-PCI impaired loans and leases: |  |  |  |  |  |  |  |  |  |  |
Commercial: |  |  |  |  |  |  |  |  |  |  |
Construction and land development |  |  |  |  | $ | 3,915 |  |  | $ | 53 |  |  | $ | 1,734 |  |  | $ | 84 |
Commercial mortgage |  |  |  |  | 64,363 |  |  | 2,188 |  |  | 65,943 |  |  | 2,569 |
Other commercial real estate |  |  |  |  | 919 |  |  | 27 |  |  | 1,225 |  |  | 43 |
Commercial and industrial and leases |  |  |  |  | 11,884 |  |  | 482 |  |  | 9,560 |  |  | 364 |
Other |  |  |  |  | 396 |  |  | 11 |  |  | 135 |  |  | 3 |
Total commercial |  |  |  |  | 81,477 |  |  | 2,761 |  |  | 78,597 |  |  | 3,063 |
Noncommercial: |  |  |  |  |  |  |  |  |  |  |
Residential mortgage |  |  |  |  | 52,045 |  |  | 1,386 |  |  | 41,368 |  |  | 1,237 |
Revolving mortgage |  |  |  |  | 29,516 |  |  | 1,009 |  |  | 26,759 |  |  | 900 |
Construction and land development |  |  |  |  | 3,589 |  |  | 116 |  |  | 3,677 |  |  | 172 |
Consumer |  |  |  |  | 3,311 |  |  | 138 |  |  | 2,722 |  |  | 116 |
Total noncommercial |  |  |  |  | 88,461 |  |  | 2,649 |  |  | 74,526 |  |  | 2,425 |
Total non-PCI impaired loans and leases |  |  |  |  | $ | 169,938 |  |  | $ | 5,410 |  |  | $ | 153,123 |  |  | $ | 5,488 |
Allocation of Allowance for Credit Losses | The following table presents the PCI allowance and recorded investment in loans at December 31, 2019.
(Dollars in thousands) |  |  | December 31, 2019
Allowance for loan losses: |  |  |
ALLL for loans acquired with deteriorated credit quality |  |  | $ | 7,536 |
Loans acquired with deteriorated credit quality |  |  | 558,716 |
Troubled Debt Restructuring, Summary of Accrual Status | The following tables provides a summary of total TDRs by accrual status. Total TDRs at December 31, 2020 were $208.2 million. Total TDRs at December 31, 2019, were $171.2 million, of which $154.0 million were non-PCI and $17.2 million were PCI. Total TDRs at December 31, 2018, were $156.1 million, of which $137.9 million were non-PCI and $18.2 million were PCI.
| December 31, 2020 |  |  |  |
(Dollars in thousands) | Accruing |  | Nonaccruing |  | Total |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Construction and land development | $ | 578 |  |  | $ | 54 |  |  | $ | 632 |  |  |  |  |  |  |  |  |  |  |  |  |
Owner occupied commercial mortgage | 37,574 |  |  | 10,889 |  |  | 48,463 |  |  |  |  |  |  |  |  |  |  |  |  |
Non-owner occupied commercial mortgage | 18,336 |  |  | 1,649 |  |  | 19,985 |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial and industrial and leases | 29,131 |  |  | 3,528 |  |  | 32,659 |  |  |  |  |  |  |  |  |  |  |  |  |
Total commercial loans | 85,619 |  |  | 16,120 |  |  | 101,739 |  |  |  |  |  |  |  |  |  |  |  |  |
Consumer: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage | 29,458 |  |  | 19,380 |  |  | 48,838 |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving mortgage | 20,124 |  |  | 7,128 |  |  | 27,252 |  |  |  |  |  |  |  |  |  |  |  |  |
Construction and land development | 1,573 |  |  | 9 |  |  | 1,582 |  |  |  |  |  |  |  |  |  |  |  |  |
Consumer auto | 2,018 |  |  | 696 |  |  | 2,714 |  |  |  |  |  |  |  |  |  |  |  |  |
Consumer other | 955 |  |  | 137 |  |  | 1,092 |  |  |  |  |  |  |  |  |  |  |  |  |
Total consumer loans | 54,128 |  |  | 27,350 |  |  | 81,478 |  |  |  |  |  |  |  |  |  |  |  |  |
PCD loans | 17,617 |  |  | 7,346 |  |  | 24,963 |  |  |  |  |  |  |  |  |  |  |  |  |
Total loans | $ | 157,364 |  |  | $ | 50,816 |  |  | $ | 208,180 |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  | December 31, 2019 |  | December 31, 2018
(Dollars in thousands) |  |  |  |  |  |  | Accruing |  | Nonaccruing |  | Total |  | Accruing |  | Nonaccruing |  | Total
Commercial loans: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Construction and land development |  |  |  |  |  |  | $ | 487 |  |  | $ | 2,279 |  |  | $ | 2,766 |  |  | $ | 1,946 |  |  | $ | 352 |  |  | $ | 2,298 |
Commercial mortgage |  |  |  |  |  |  | 50,819 |  |  | 11,116 |  |  | 61,935 |  |  | 53,270 |  |  | 7,795 |  |  | 61,065 |
Other commercial real estate |  |  |  |  |  |  | 571 |  |  | — |  |  | 571 |  |  | 851 |  |  | 9 |  |  | 860 |
Commercial and industrial and leases |  |  |  |  |  |  | 9,430 |  |  | 2,409 |  |  | 11,839 |  |  | 7,986 |  |  | 2,060 |  |  | 10,046 |
Other |  |  |  |  |  |  | 320 |  |  | 105 |  |  | 425 |  |  | 118 |  |  | 173 |  |  | 291 |
Total commercial loans |  |  |  |  |  |  | 61,627 |  |  | 15,909 |  |  | 77,536 |  |  | 64,171 |  |  | 10,389 |  |  | 74,560 |
Noncommercial: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage |  |  |  |  |  |  | 41,813 |  |  | 16,048 |  |  | 57,861 |  |  | 37,903 |  |  | 9,621 |  |  | 47,524 |
Revolving mortgage |  |  |  |  |  |  | 21,032 |  |  | 7,367 |  |  | 28,399 |  |  | 20,492 |  |  | 8,196 |  |  | 28,688 |
Construction and land development |  |  |  |  |  |  | 1,452 |  |  | 2,430 |  |  | 3,882 |  |  | 2,227 |  |  | 110 |  |  | 2,337 |
Consumer |  |  |  |  |  |  | 2,826 |  |  | 688 |  |  | 3,514 |  |  | 2,300 |  |  | 721 |  |  | 3,021 |
Total noncommercial loans |  |  |  |  |  |  | 67,123 |  |  | 26,533 |  |  | 93,656 |  |  | 62,922 |  |  | 18,648 |  |  | 81,570 |
Total loans |  |  |  |  |  |  | $ | 128,750 |  |  | $ | 42,442 |  |  | $ | 171,192 |  |  | $ | 127,093 |  |  | $ | 29,037 |  |  | $ | 156,130 |
Troubled Debt Restructurings on Financing Receivables |
| 2020 |  | 2019 |  | 2018
| All restructurings |  | Restructurings with payment default |  | All restructurings |  | Restructurings with payment default |  | All restructurings |  | Restructurings with payment default
| Number of loans | Amortized cost at period end |  | Number of loans | Amortized cost at period end |  | Number of loans | Amortized cost at period end |  | Number of loans | Amortized cost at period end |  | Number of loans | Amortized cost at period end |  | Number of loans | Amortized cost at period end
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans and leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest only period provided |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans | 31 | $ | 28,145 |  |  | 4 | $ | 4,498 |  |  | 11 | $ | 1,595 |  |  | 1 | $ | 238 |  |  | 3 | $ | 1,003 |  |  | — | $ | — |
Consumer loans | 6 | 4,169 |  |  | 5 | 2,569 |  |  | 7 | 4,018 |  |  | 2 | 2,717 |  |  | — | — |  |  | — | — |
Total interest only | 37 | 32,314 |  |  | 9 | 7,067 |  |  | 18 | 5,613 |  |  | 3 | 2,955 |  |  | 3 | 1,003 |  |  | — | — |
Loan term extension |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans | 26 | 5,444 |  |  | 5 | 1,471 |  |  | 16 | 3,904 |  |  | 5 | 533 |  |  | 21 | 3,933 |  |  | 4 | 675 |
Consumer loans | 66 | 5,689 |  |  | 43 | 3,241 |  |  | 2 | 342 |  |  | 1 | 306 |  |  | 21 | 1,554 |  |  | 4 | 190 |
Total loan term extension | 92 | 11,133 |  |  | 48 | 4,712 |  |  | 18 | 4,246 |  |  | 6 | 839 |  |  | 42 | 5,487 |  |  | 8 | 865 |
Below market interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans | 98 | 33,870 |  |  | 26 | 1,912 |  |  | 90 | 13,932 |  |  | 24 | 2,634 |  |  | 85 | 12,859 |  |  | 24 | 2,998 |
Consumer loans | 156 | 6,074 |  |  | 60 | 3,897 |  |  | 176 | 12,458 |  |  | 66 | 4,014 |  |  | 184 | 15,545 |  |  | 68 | 5,461 |
Total below market interest rate | 254 | 39,944 |  |  | 86 | 5,809 |  |  | 266 | 26,390 |  |  | 90 | 6,648 |  |  | 269 | 28,404 |  |  | 92 | 8,459 |
Discharged from bankruptcy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial loans | 30 | 1,168 |  |  | 17 | 286 |  |  | 25 | 5,571 |  |  | 20 | 5,028 |  |  | 26 | 2,043 |  |  | 8 | 825 |
Consumer loans | 186 | 8,129 |  |  | 66 | 2,928 |  |  | 178 | 10,349 |  |  | 71 | 4,239 |  |  | 151 | 6,617 |  |  | 56 | 3,169 |
Total discharged from bankruptcy | 216 | 9,297 |  |  | 83 | 3,214 |  |  | 203 | 15,920 |  |  | 91 | 9,267 |  |  | 177 | 8,660 |  |  | 64 | 3,994 |
Total restructurings | 599 | $ | 92,688 |  |  | 226 | $ | 20,802 |  |  | 505 | $ | 52,169 |  |  | 190 | $ | 19,709 |  |  | 491 | $ | 43,554 |  |  | 164 | $ | 13,318 |

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