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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2021
Income Tax Disclosure [Abstract] |
Schedule of income tax expense | The following table shows the composition of income tax expense.
Year Ended December 31 (Dollars in thousands) |  | 2021 |  | 2020 |  | 2019
Current: |  |  |  |  |  |
Federal |  | $ | 16,346 |  |  | $ | 42,411 |  |  | $ | 28,130 |
State |  | 4,586 |  |  | 6,629 |  |  | 5,739 |
Total current |  | 20,932 |  |  | 49,040 |  |  | 33,869 |
Deferred: |  |  |  |  |  |
Federal |  | 14,206 |  |  | (21,865) |  |  | (5,135) |
State |  | 1,190 |  |  | (2,295) |  |  | (595) |
Total deferred |  | 15,396 |  |  | (24,160) |  |  | (5,730) |
Total provision |  | $ | 36,328 |  |  | $ | 24,880 |  |  | $ | 28,139 |
Schedule of reasons for the difference between income tax expense and the amount computed by applying the statutory federal income tax rate | The following table shows the reasons for the difference between income tax expense and the amount computed by applying the statutory federal income tax rate (21%) to income before income taxes.
|  | 2021 |  | 2020 |  | 2019
Year Ended December 31 (Dollars in thousands) |  | Amount |  | Percent of Pretax Income |  | Amount |  | Percent of Pretax Income |  | Amount |  | Percent of Pretax Income
Statutory federal income tax |  | $ | 32,526 |  |  | 21.0 | % |  | $ | 22,332 |  |  | 21.0 | % |  | $ | 25,232 |  |  | 21.0 | %
(Decrease) increase in income taxes resulting from: |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt interest income |  | (373) |  |  | (0.2) |  |  | (439) |  |  | (0.4) |  |  | (552) |  |  | (0.5) |
State taxes, net of federal income tax benefit |  | 4,563 |  |  | 2.9 |  |  | 3,424 |  |  | 3.2 |  |  | 4,064 |  |  | 3.4 |
Other |  | (388) |  |  | (0.2) |  |  | (437) |  |  | (0.4) |  |  | (605) |  |  | (0.5) |
Total |  | $ | 36,328 |  |  | 23.5 | % |  | $ | 24,880 |  |  | 23.4 | % |  | $ | 28,139 |  |  | 23.4 | %
Schedule of deferred tax assets and liabilities | The following table shows the composition of deferred tax assets and liabilities as of December 31, 2021 and 2020.
(Dollars in thousands) |  | 2021 |  | 2020
Deferred tax assets: |  |  |  |
Allowance for credit losses |  | $ | 32,431 |  |  | $ | 35,696 |
Tax credit carryforward |  | — |  |  | 8,606 |
Operating lease liability |  | 5,145 |  |  | 5,704 |
Accruals for employee benefits |  | 3,837 |  |  | 2,963 |
Capitalized loan costs |  | 15 |  |  | 893 |
Net unrealized losses on securities available-for-sale |  | 3,128 |  |  | — |
Other |  | 1,015 |  |  | 851 |
Total deferred tax assets |  | 45,571 |  |  | 54,713 |
Deferred tax liabilities: |  |  |  |
Differing depreciable bases in premises and leased equipment |  | 10,796 |  |  | 13,118 |
Right of use assets - leases |  | 5,315 |  |  | 5,737 |
Differing bases in assets related to acquisitions |  | 4,219 |  |  | 4,160 |
Tax advantaged partnerships |  | 9,502 |  |  | 3,770 |
Net unrealized gains on securities available-for-sale |  | — |  |  | 5,827 |
Other |  | 713 |  |  | 634 |
Total deferred tax liabilities |  | 30,545 |  |  | 33,246 |
Net deferred tax asset |  | $ | 15,026 |  |  | $ | 21,467 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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