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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details) | 12 Months Ended |  |
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Dec. 31, 2021 USD ($) lease $ / shares shares | Dec. 31, 2020 USD ($) lease $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | May 21, 2021 USD ($) | Jan. 01, 2019 USD ($)
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Number of Stores | 17 |  |  |  |
Assets under Management, Carrying Amount | $ 2,700,000,000 |  |  |  |
Federal Home Loan Bank Stock Par Value | $ / shares | $ 100 |  |  |  |
Threshold Period Past Due for Write-off of Financing Receivable | 90 days |  |  |  |
Description Of Accounting Treatment For Short Term Operating Lease | As of December 31, 2021 and 2020, the Company had no short-term leases. |  |  |  |
Financing Receivable, Individually Evaluated for Impairment | $ 2,170,000 | $ 855,000 |  |  |
Financing Receivable, Recorded Investment | $ 977,589,000 | $ 964,256,000 |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares | 22,000 | 139,759 | 12,000 |  |
Income Taxes Paid | $ 200,000 | $ 315,000 | $ 785,000 |  |
Real Estate Owned, Transfer from Real Estate Owned | 8,000 | 40,000 | 75,000 |  |
Operating Lease, Right-of-Use Asset | 667,000 | 758,000 |  |  |
Operating Lease, Liability | 682,000 | 776,000 |  |  |
Finance Lease, Right-of-Use Asset | 2,684,000 | 2,956,000 |  |  |
Finance Lease, Liability | 2,899,000 | 3,109,000 |  |  |
Cumulative effect adjustment for change in accounting principal | 60,005,000 | 54,641,000 |  |  |
Total interest payments | 8,049,000 | 11,040,000 | $ 13,779,000 |  |
Deposits | $ 10,942,000 | $ 2,585,000 |  |  |
Core Deposits Intangibles |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Finite-lived intangible asset useful life | 10 years |  |  |  |
Citizen's Neighborhood Bank Branch |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Deposits acquired at premium percentage |  |  |  | 3.71% |
Deposits acquired at premium amount |  |  |  | $ 1,600,000 |
Citizen's Neighborhood Bank Branch |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Deposits |  |  |  | $ 42,000,000 |
Deposits acquired at premium percentage |  |  |  | 3.71% |
Deposits acquired at premium amount |  |  |  | $ 1,600,000 |
Minimum |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Price Of Anti Dilutive Option Amount | $ / shares | $ 4.00 | $ 3.18 | $ 4.19 |  |
Maximum |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Price Of Anti Dilutive Option Amount | $ / shares | $ 4.22 | $ 4.22 | $ 4.22 |  |
ASU 2016-02 | Cumulative Effect, Period of Adoption, Adjustment | Revision of Prior Period, Adjustment |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  |  | $ 932,000
Operating Lease, Liability |  |  |  |  | 932,000
Finance Lease, Right-of-Use Asset |  |  |  |  | 3,300,000
Finance Lease, Liability |  |  |  |  | $ 3,300,000
Wealth management | ASU 2014-09 | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Cumulative effect adjustment for change in accounting principal |  |  | $ 640,000 |  |
Commercial |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Minimum aggregate balances for commercial loan relationship under structure loan rating process | $ 1,000,000 |  |  |  |
Small Business Loans | Maximum |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Financing Receivable, Recorded Investment | 250,000 |  |  |  |
Consumer and Residential Mortgage Loans | Minimum |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Financing Receivable, Individually Evaluated for Impairment | $ 150,000 |  |  |  |
Premises |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Property, Plant and Equipment, Useful Life | 30 years |  |  |  |
Equipment |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |  |  |
New Finance Leased Assets |  |  |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |
Number of financing leases | lease |  | 2 |  |  |
Number of financing leases relating to office equipment | lease | 1 |  |  |  |
Finance Lease, Right-of-Use Asset |  | $ 149,000 |  |  |
Finance Lease, Liability |  | $ 149,000 |  |  |

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