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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2023
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense | The components of income tax expense (benefit) for the years ended December 31, 2023, 2022, and 2021 are as follows:
($ in thousands) |  | 2023 |  | 2022 |  | 2021
Current | - Federal |  | $ | 24,750 |  |  | 35,616 |  |  | 25,742 |
| - State |  | 3,857 |  |  | 4,477 |  |  | 3,733 |
Deferred | - Federal |  | (481) |  |  | (1,658) |  |  | (4,247) |
| - State |  | (301) |  |  | (152) |  |  | (553) |
Total |  | $ | 27,825 |  |  | 38,283 |  |  | 24,675 |
Schedule of Effective Tax Rate Reconciliation | The following is a reconciliation of federal income tax expense at the statutory rate of 21% at December 31, 2023, December 31, 2022, and December 31, 2021, to the income tax provision reported in the financial statements.
($ in thousands) |  | 2023 |  | 2022 |  | 2021
Tax provision at statutory rate |  | $ | 27,711 |  |  | 38,896 |  |  | 25,266 |
Increase (decrease) in income taxes resulting from: |  |  |  |  |  |
Tax-exempt interest income |  | (2,175) |  |  | (1,976) |  |  | (1,589) |
Low income housing and other tax credits |  | (630) |  |  | (669) |  |  | (1,229) |
Bank-owned life insurance income |  | (920) |  |  | (1,511) |  |  | (589) |
Non-deductible interest expense |  | 241 |  |  | 26 |  |  | 14 |
State income taxes, net of federal benefit |  | 2,809 |  |  | 3,369 |  |  | 2,472 |
Nondeductible merger expenses |  | 489 |  |  | 107 |  |  | 242 |
Change in valuation allowance |  | (13) |  |  | (20) |  |  | (10) |
Nondeductible compensation |  | 274 |  |  | 97 |  |  | 27 |
Other, net |  | 39 |  |  | (36) |  |  | 71 |
Total |  | $ | 27,825 |  |  | 38,283 |  |  | 24,675 |
Schedule of Deferred Tax Assets and Liabilities | The sources and tax effects of temporary differences that give rise to significant portions of the deferred tax assets, which are included in Other Assets on the consolidated balance sheets are as follows at December 31, 2023 and 2022:
($ in thousands) |  | 2023 |  | 2022
Deferred tax assets: |  |  |  |
Allowance for credit losses on loans |  | $ | 25,431 |  |  | 20,900 |
Allowance for credit losses on unfunded commitments |  | 2,632 |  |  | 3,057 |
Excess book over tax pension plan cost |  | 403 |  |  | 365 |
Deferred compensation |  | 1,453 |  |  | 638 |
Federal & state net operating loss and tax credit carryforwards |  | 188 |  |  | 197 |
Accruals, book versus tax |  | 3,462 |  |  | 4,404 |
Pension |  | 23 |  |  | — |
Unrealized losses on securities available for sale |  | 92,767 |  |  | 102,046 |
Foreclosed real estate |  | — |  |  | 3 |
Basis differences in assets acquired in FDIC transactions |  | 46 |  |  | — |
Purchase accounting adjustments |  | 4,691 |  |  | 2,982 |
Equity compensation |  | 1,524 |  |  | 768 |
Partnership investments |  | 773 |  |  | 652 |
Leases |  | 178 |  |  | 151 |
SBA servicing asset |  | 31 |  |  | 77 |
Gross deferred tax assets |  | 133,602 |  |  | 136,240 |
Less: Valuation allowance |  | (17) |  |  | (30) |
Net deferred tax assets |  | 133,585 |  |  | 136,210 |
Deferred tax liabilities: |  |  |  |
Loan fees |  | (2,952) |  |  | (3,102) |
Depreciable basis of fixed assets |  | (7,070) |  |  | (5,493) |
Amortizable basis of intangible assets |  | (15,523) |  |  | (10,047) |
Basis differences in assets acquired in FDIC transactions |  | — |  |  | (108) |
Trust preferred securities |  | (388) |  |  | (416) |
Pension |  | — |  |  | (12) |
Gross deferred tax liabilities |  | (25,933) |  |  | (19,178) |
Net deferred tax asset |  | $ | 107,652 |  |  | 117,032 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 9 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-9 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 12 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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