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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional information (Details) | 12 Months Ended |
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Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares | Jan. 01, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of Stores | 16 |  |  |
Assets under Management, Carrying Amount | $ 2,200,000,000 |  |  |
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, 2019, the Company had one short-term equipment lease which it has elected to not record on the Consolidated Balance Sheets. |  |  |
Financing Receivable, Individually Evaluated for Impairment | $ 824,000 | $ 11,000 |  |
Financing Receivable, Recorded Investment | $ 878,307,000 | $ 856,020,000 |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares | 12,000 | 5,000 | 10,000 |
Income Taxes Paid | $ 785,000 | $ 875,000 | $ 1,075,000 |
Real Estate Owned, Transfer from Real Estate Owned | 75,000 | 166,000 | 77,000 |
Operating Lease, Right-of-Use Asset | 846,000 | 0 |  |
Operating Lease, Liability | 865,000 | 0 |  |
Finance Lease, Right-of-Use Asset | 3,078,000 | 0 |  |
Finance Lease, Liability | 3,163,000 | 0 |  |
Total interest payments | $ 13,779,000 | $ 11,298,000 | $ 8,681,000 |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Price Of Anti Dilutive Option Amount | $ / shares |  | $ 4.22 | $ 4.00 |
Non Cash Transfer Of Applicable Minimum Tax To Other Assets |  | $ 287,000 |  |
Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Price Of Anti Dilutive Option Amount | $ / shares | $ 4.19 |  |  |
Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Price Of Anti Dilutive Option Amount | $ / shares | $ 4.22 |  |  |
ASU 2016-02 |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
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 [Member] | ASU 2014-09 |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Effect of adoption of revenue recognition standard - ASC Topic 606 | $ 640,000 |  |  |
Commercial Portfolio Segment [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Minimum aggregate balances for commercial loan relationship under structure loan rating process | 1,000,000 |  |  |
Small Business Loans [Member] | Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Financing Receivable, Recorded Investment | 250,000 |  |  |
Consumer and Residential Mortgage Loans [Member] | Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Financing Receivable, Individually Evaluated for Impairment | $ 150,000 |  |  |
Premises [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 30 years |  |  |
Equipment [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |  |

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