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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) item $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) lease $ / shares shares
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Number of Stores | 17 |  |
Number of locations in Southwestern Pennsylvania Counties | item | 5 |  |
Assets under Management, Carrying Amount | $ 2,300,000,000 |  |
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, 2022, the Company had one short-term lease for an office location compared to no short-term leases as of December 31, 2021. |  |
Financing Receivable, Individually Evaluated for Impairment | $ 3,575,000 | $ 2,170,000 |
Financing receivable, recorded investment | $ 983,185,000 | $ 977,589,000 |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares | 22,000 | 22,000 | 139,759
Income Taxes Paid | $ 1,100,000 | $ 200,000 | $ 315,000
Real Estate Owned, Transfer from Real Estate Owned | 53,000 | 8,000 | 40,000
Operating Lease, Right-of-Use Asset | 630,000 | 667,000 |
Operating Lease, Liability | 643,000 | 682,000 |
Finance Lease, Right-of-Use Asset | 2,413,000 | 2,684,000 |
Finance Lease, Liability | 2,680,000 | 2,899,000 |
Cumulative effect adjustment for change in accounting principal | 65,486,000 | 60,005,000 |
Total interest payments | 8,450,000 | 8,049,000 | $ 11,040,000
Deposits | 4,132,000 | 10,942,000 |
Financing Receivables 30To 59Days Past Due Member |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Financing receivable, recorded investment | 5,479,000 | 4,649,000 |
Financing Receivables Equal To Greater Than 90Days Past Due Member |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Financing receivable, recorded investment | 1,279,000 | 1,129,000 |
Financing Receivables 60To 89Days Past Due Member |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Financing receivable, recorded investment | $ 823,000 | $ 1,687,000 |
Core Deposits Intangibles |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Finite-lived intangible asset useful life | 10 years |  |
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 | $ 4.00 | $ 3.18
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
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 | $ 45,000 |  | $ 149,000
Finance Lease, Liability | $ 45,000 |  | $ 149,000

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