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INCOME TAXES - Additional Information (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating Loss Carryforwards [Line Items] |  |  |  |
Tax benefit recognized in connection with exercise of SARs | $ 2,500,000 |  |  |
Unused tax credit carryforward | 23,000,000 | $ 30,200,000 |  |
Valuation allowance | 0 | 0 |  |
Unrecognized tax benefits | 925,000 | 924,000 | $ 977,000 | $ 1,227,000
Total unrecognized tax benefit that, if recognized, would impact the effective tax rate | 699,000 |  |  |
Accrued penalties and interest | 0 | 0 |  |
Affordable Housing Partnerships |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Gross investment in limited partnership | 61,300,000 |  |  |
Unfunded amount in limited partnership | 10,300,000 |  |  |
Balance of investment | 39,000,000 | 43,200,000 |  |
Tax deductions | 3,700,000 | 7,200,000 | 7,800,000 |
Proportional amortization recognized | 4,200,000 | 5,300,000 | $ 3,500,000 |
Investment Tax Credit Carryforward | Affordable Housing Partnerships |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Unused tax credit carryforward | 13,200,000 | $ 9,000,000 |  |
Domestic Tax Authority |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 821,000 |  |  |
State and Local Jurisdiction |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | $ 34,800,000 |  |  |

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- Definition Amount of investment in qualified affordable housing projects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985 + Details
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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. + 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 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120384911&loc=d3e23163-113944 + Details
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