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INCOME TAXES - Computation of Differences Between Financial Statement Tax Expense And Amounts (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income taxes at statutory federal rate of 21% |  |  |  |  |  |  |  |  | $ 24,663 | $ 21,814 | $ 22,551
Increase (decrease) in taxes resulting from: |  |  |  |  |  |  |  |  |  |  |
Tax exempt income |  |  |  |  |  |  |  |  | (2,822) | (1,925) | (1,682)
Nondeductible expense |  |  |  |  |  |  |  |  | 116 | 117 | 194
State income tax, net of federal tax effect |  |  |  |  |  |  |  |  | 1,288 | 944 | 1,040
Captive insurance premium income |  |  |  |  |  |  |  |  | (303) | (227) | (310)
Tax credits |  |  |  |  |  |  |  |  | (578) | (540) | (548)
Bank owned life insurance |  |  |  |  |  |  |  |  | (596) | (595) | (573)
Long-term incentive plan |  |  |  |  |  |  |  |  | (274) | (58) | (421)
Nondeductible compensation expense |  |  |  |  |  |  |  |  | 156 | 0 | 0
Other |  |  |  |  |  |  |  |  | 61 | 9 | 87
Total income tax expense | $ 5,507 | $ 5,469 | $ 5,705 | $ 5,030 | $ 6,071 | $ 5,377 | $ 4,448 | $ 3,643 | $ 21,711 | $ 19,539 | $ 20,338

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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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