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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Accounting Policies [Abstract] |
Additional Cash Flow Information | Additional cash flow information was as follows:
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Cash paid for interest | $ | 29,003 |  |  | $ | 49,300 |  |  | $ | 124,781 |
Cash paid for income tax | 39,852 |  |  | 44,140 |  |  | 45,352 |
Significant non-cash transactions: |  |  |  |  |
Transfer of securities from available for sale to held to maturity | — |  |  | — |  |  | 377,812 |
Exchange of real estate | 11,036 |  |  | — |  |  | — |
Unsettled securities transactions | 27,032 |  |  | 57,783 |  |  | — |
Loans foreclosed and transferred to other real estate owned and foreclosed assets | 3,464 |  |  | 140 |  |  | 1,348 |
Loans to facilitate the sale of other real estate owned | — |  |  | — |  |  | 847 |
Right-of-use lease assets obtained in exchange for lessee operating lease liabilities | 12,854 |  |  | 18,284 |  |  | 319,286 |
Treasury stock issued to 401(k) stock purchase plan | 1,749 |  |  | 10,307 |  |  | — |
Accounting Standards Update and Change in Accounting Principle | The following table details the impact of the adoption of ASC 326 on the allowance for credit losses as of January 1, 2020.
| January 1, 2020
| Pre-Adoption Allowance |  | Impact of Adoption |  | Post-Adoption Allowance |  | Cumulative Effect on Retained Earnings
Securities held to maturity: |  |  |  |  |  |  |
U.S. Treasury | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Residential mortgage-backed securities | — |  |  | — |  |  | — |  |  | — |
States and political subdivisions | — |  |  | 215 |  |  | 215 |  |  | (170) |
Other | — |  |  | — |  |  | — |  |  | — |
Total | $ | — |  |  | $ | 215 |  |  | $ | 215 |  |  | $ | (170) |
Loans: |  |  |  |  |  |  |
Commercial and industrial | $ | 51,593 |  |  | $ | 21,263 |  |  | $ | 72,856 |  |  | $ | (16,798) |
Energy | 37,382 |  |  | (10,453) |  |  | 26,929 |  |  | 8,258 |
Commercial real estate | 31,037 |  |  | (13,519) |  |  | 17,518 |  |  | 10,680 |
Consumer real estate | 4,113 |  |  | 2,392 |  |  | 6,505 |  |  | (1,890) |
Consumer and other | 8,042 |  |  | (2,248) |  |  | 5,794 |  |  | 1,776 |
Total | $ | 132,167 |  |  | $ | (2,565) |  |  | $ | 129,602 |  |  | $ | 2,026 |
Off-balance-sheet credit exposures | $ | 500 |  |  | $ | 39,377 |  |  | $ | 39,877 |  |  | $ | (31,108) |

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