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Loans (Tables) | 9 Months Ended
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Sep. 30, 2020
Financing Receivable, Credit Quality Indicator - interest written off on nonaccrual loans [Line Items] |
Analysis of Loan Portfolio by Major Types of Loans | The Company’s loan portfolio includes originated and purchased loans. The following is an analysis of the loan portfolio by segment and class (net of unearned income):
|  | September 30, 2020 |  | December 31, 2019
|  | (dollars in thousands)
Commercial loans: |  |  |  |
Commercial real estate |  | $ | 4,027,035 |  |  | $ | 3,945,853 |
Commercial business |  | 3,836,009 |  |  | 2,989,613 |
Agriculture |  | 850,290 |  |  | 765,371 |
Construction |  | 273,176 |  |  | 361,533 |
Consumer loans: |  |  |  |
One-to-four family residential real estate |  | 665,432 |  |  | 637,325 |
Other consumer |  | 37,005 |  |  | 43,770 |
Total loans |  | 9,688,947 |  |  | 8,743,465 |
Less: Allowance for credit losses |  | (156,968) |  |  | (83,968) |
Total loans, net |  | $ | 9,531,979 |  |  | $ | 8,659,497 |
Loans held for sale |  | $ | 24,407 |  |  | $ | 17,718 |
Analysis of the Aged Loan Portfolio | The following is an aging of the recorded investment of the loan portfolio as of September 30, 2020 and December 31, 2019:
|  | Current Loans |  | 30 - 59 Days Past Due |  | 60 - 89 Days Past Due |  | Greater than 90 Days Past Due |  | Total Past Due |  | Nonaccrual Loans |  | Total Loans
September 30, 2020 |  | (in thousands)
Commercial loans: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial real estate |  | $ | 4,015,038 |  |  | $ | 547 |  |  | $ | 1,088 |  |  | $ | — |  |  | $ | 1,635 |  |  | $ | 10,362 |  |  | $ | 4,027,035 |
Commercial business |  | 3,808,794 |  |  | 6,987 |  |  | 915 |  |  | — |  |  | 7,902 |  |  | 19,313 |  |  | 3,836,009 |
Agriculture |  | 833,408 |  |  | 1,710 |  |  | 259 |  |  | — |  |  | 1,969 |  |  | 14,913 |  |  | 850,290 |
Construction |  | 272,959 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 217 |  |  | 273,176 |
Consumer loans: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential real estate |  | 658,468 |  |  | 4,559 |  |  | — |  |  | — |  |  | 4,559 |  |  | 2,405 |  |  | 665,432 |
Other consumer |  | 36,744 |  |  | 215 |  |  | 25 |  |  | — |  |  | 240 |  |  | 21 |  |  | 37,005 |
Total |  | $ | 9,625,411 |  |  | $ | 14,018 |  |  | $ | 2,287 |  |  | $ | — |  |  | $ | 16,305 |  |  | $ | 47,231 |  |  | $ | 9,688,947 |
|  | Current Loans |  | 30 - 59 Days Past Due |  | 60 - 89 Days Past Due |  | Greater than 90 Days Past Due |  | Total Past Due |  | Nonaccrual Loans |  | Total Loans
December 31, 2019 |  | (in thousands)
Commercial loans: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial real estate |  | $ | 3,935,633 |  |  | $ | 6,421 |  |  | $ | — |  |  | — |  |  | $ | 6,421 |  |  | $ | 3,799 |  |  | $ | 3,945,853 |
Commercial business |  | 2,959,826 |  |  | 6,081 |  |  | 2,769 |  |  | — |  |  | 8,850 |  |  | 20,937 |  |  | 2,989,613 |
Agriculture |  | 755,719 |  |  | 2,283 |  |  | 2,346 |  |  | — |  |  | 4,629 |  |  | 5,023 |  |  | 765,371 |
Construction |  | 360,582 |  |  | 951 |  |  | — |  |  | — |  |  | 951 |  |  | — |  |  | 361,533 |
Consumer loans: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential real estate |  | 631,109 |  |  | 2,516 |  |  | 408 |  |  | — |  |  | 2,924 |  |  | 3,292 |  |  | 637,325 |
Other consumer |  | 43,654 |  |  | 80 |  |  | 27 |  |  | — |  |  | 107 |  |  | 9 |  |  | 43,770 |
Total |  | $ | 8,686,523 |  |  | $ | 18,332 |  |  | $ | 5,550 |  |  | $ | — |  |  | $ | 23,882 |  |  | $ | 33,060 |  |  | $ | 8,743,465 |
Interest written off on nonaccrual loans | The following table summarizes written-off interest on nonaccrual loans for the three and nine months ended September 30, 2020 and 2019:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2020 |  | 2019 |  | 2020 |  | 2019
|  | (in thousands)
Commercial loans |  | $ | 387 |  |  | $ | 149 |  |  | $ | 1,835 |  |  | $ | 1,316 |
Consumer loans |  | 6 |  |  | 26 |  |  | 19 |  |  | 146 |
Total |  | $ | 393 |  |  | $ | 175 |  |  | $ | 1,854 |  |  | $ | 1,462 |
Analysis of Nonaccrual Loans | The following summarizes the amortized cost of nonaccrual loans for which there was no related ACL as of September 30, 2020 and December 31, 2019:
|  | September 30, 2020 |  | December 31, 2019
|  | (in thousands)
Commercial loans: |  |  |  |
Commercial real estate |  | $ | 9,092 |  |  | $ | 1,715 |
Commercial business |  | 11,713 |  |  | 15,762 |
Agriculture |  | 11,074 |  |  | 1,798 |
Total |  | $ | 31,879 |  |  | $ | 19,275 |
Analysis of loans classified as Troubled Debt Restructurings (“TDR”) | The following is an analysis of loans classified as TDR during the three and nine months ended September 30, 2020 and 2019:
|  | Three Months Ended September 30, 2020 |  | Three Months Ended September 30, 2019
|  | Number of TDR Modifications |  | Pre-Modification Outstanding Recorded Investment |  | Post-Modification Outstanding Recorded Investment |  | Number of TDR Modifications |  | Pre-Modification Outstanding Recorded Investment |  | Post-Modification Outstanding Recorded Investment
|  | (dollars in thousands)
Commercial loans: |  |  |  |  |  |  |  |  |  |  |  |
Commercial business |  | 4 |  |  | $ | 795 |  |  | 795 |  |  | 5 |  |  | 5,026 |  |  | 5,026 |
Agriculture |  | 1 |  |  | 2,600 |  |  | 2,600 |  |  | — |  |  | — |  |  | — |
Consumer loans: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential real estate |  | 4 |  |  | 618 |  |  | 618 |  |  | 5 |  |  | 357 |  |  | 357 |
Other consumer |  | — |  |  | — |  |  | — |  |  | 1 |  |  | 1 |  |  | 1 |
Total |  | 9 |  |  | $ | 4,013 |  |  | $ | 4,013 |  |  | 11 |  |  | $ | 5,384 |  |  | $ | 5,384 |
|  | Nine Months Ended September 30, 2020 |  | Nine Months Ended September 30, 2019
|  | Number of TDR Modifications |  | Pre-Modification Outstanding Recorded Investment |  | Post-Modification Outstanding Recorded Investment |  | Number of TDR Modifications |  | Pre-Modification Outstanding Recorded Investment |  | Post-Modification Outstanding Recorded Investment
|  | (dollars in thousands)
Commercial loans: |  |  |  |  |  |  |  |  |  |  |  |
Commercial business |  | 10 |  |  | $ | 2,757 |  |  | $ | 2,757 |  |  | 10 |  |  | $ | 6,560 |  |  | $ | 6,560 |
Agriculture |  | 2 |  |  | 3,495 |  |  | 3,495 |  |  | — |  |  | — |  |  | — |
Consumer loans: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential real estate |  | 6 |  |  | 814 |  |  | 814 |  |  | 10 |  |  | 692 |  |  | 692 |
Other consumer |  | — |  |  | — |  |  | — |  |  | 1 |  |  | 1 |  |  | 1 |
Total |  | 18 |  |  | $ | 7,066 |  |  | $ | 7,066 |  |  | 21 |  |  | $ | 7,253 |  |  | $ | 7,253 |

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