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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2019
Income Tax Disclosure [Abstract] |
Schedule of components of income tax expense (benefit) | Components of income tax expense (benefit) for the years ended December 31, 2019, 2018 and 2017 were as follows:
| Year Ended December 31,
| 2019 |  | 2018 |  | 2017
| (Dollars in thousands)
Current expense: |  |  |  |  |
Federal | $ | 23,359 |  |  | $ | 10,812 |  |  | $ | 2,471 |
State | 211 |  |  | 72 |  |  | (81 | )
Total current | 23,570 |  |  | 10,884 |  |  | 2,390 |
Deferred expense: |  |  |  |  |
Federal | (8,970 | ) |  | 2,137 |  |  | 27,263 |
State | 5,005 |  |  | 5,737 |  |  | 4,943 |
Total deferred | (3,965 | ) |  | 7,874 |  |  | 32,206 |
Provision for income taxes | $ | 19,605 |  |  | $ | 18,758 |  |  | $ | 34,596 |
Schedule of the reasons of difference between the income tax expense (benefit) and the expected tax expense | Income tax expense (benefit) for the periods presented differed from the "expected" tax expense (computed by applying the U.S. federal corporate tax rate of 21% for the years ended December 31, 2019 and December 31, 2018 and 35% for the year ended December 31, 2017, to income (loss) before income taxes) for the following reasons:
| Year Ended December 31,
| 2019 |  | 2018 |  | 2017
| (Dollars in thousands)
Computed "expected" tax expense (benefit) | $ | 16,365 |  |  | $ | 16,430 |  |  | $ | 26,270 |
Increase (decrease) in taxes resulting from: |  |  |  |  |  |  |
Tax-exempt interest income | (675 | ) |  | (808 | ) |  | (1,387 | )
Other tax-exempt income | (652 | ) |  | (445 | ) |  | (1,186 | )
Low-income housing and energy tax credits | (182 | ) |  | 35 |  |  | (594 | )
State income taxes, net of Federal income tax effect, excluding impact of deferred tax valuation allowance | 4,345 |  |  | 4,756 |  |  | 3,348 |
Change in the beginning-of-the-year balance of the valuation allowance for deferred tax assets allocated to income tax expense | (41 | ) |  | 140 |  |  | 570 |
Impact of Tax Reform on net deferred tax assets | — |  |  | (1,542 | ) |  | 7,440 |
Other, net | 445 |  |  | 192 |  |  | 135 |
Total | $ | 19,605 |  |  | $ | 18,758 |  |  | $ | 34,596 |
Schedule of the tax effects of temporary differences giving rise to significant portions of the deferred tax assets and deferred tax liabilities | The tax effects of temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities were as follows:
| December 31,
| 2019 |  | 2018
| (Dollars in thousands)
Deferred tax assets |  |  |  |  |
Lease liability | $ | 14,095 |  |  | $ | — |
Allowance for loan and lease losses | 10,136 |  |  | 10,112 |
Accrued expenses | 1,795 |  |  | 1,517 |
Employee retirement benefits | 2,847 |  |  | 2,595 |
Federal and state tax credit carryforwards | 1,821 |  |  | 7,728 |
State net operating loss carryforwards | 3,181 |  |  | 3,291 |
Restricted stock and non-qualified stock options | 954 |  |  | 1,001 |
Premises and equipment | 3,365 |  |  | 3,157 |
Other | 2,488 |  |  | 3,485 |
Total deferred tax assets | 40,682 |  |  | 32,886 |
Deferred tax liabilities |  |  |  |
Right-of-use lease asset | 14,019 |  |  | — |
Intangible assets | 3,941 |  |  | 4,189 |
Other | 2,761 |  |  | 3,698 |
Total deferred tax liabilities | 20,721 |  |  | 7,887 |
Less: Deferred tax valuation allowance | 3,420 |  |  | 3,461 |
Net deferred tax assets | $ | 16,541 |  |  | $ | 21,538 |

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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=84230637&loc=d3e32639-109319 + Details
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