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BORROWINGS (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |
Subordinated Debt | $ 49,791,000 | $ 49,696,000 |
Long-term Debt, Gross | 126,951,000 |  |
Interest Expense, Long-term Debt | 4,500,000 | 5,400,000 | $ 8,200,000
Loans Pledged as Collateral | $ 2,300,000,000 | $ 2,100,000,000 |
Federal Home Loan Bank Advances Weighted Average Interest Rate inclusive of Swaps | 2.05% | 2.30% |
Securities Sold under Agreements to Repurchase | $ 0 |  |
Interest expense on short-term borrowings | 0 |  | $ 104,000
Total Long-Term Borrowings | $ 126,707,000 | $ 145,320,000 |
Long-term Debt [Member] | Long-term Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt |  | 14,063,000 |
Fixed rate | 1.35% |  |
Long-term Debt [Member] | Long-term Debt [Member] | LIBOR [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, interest rate, stated rate inclusive of interest rate swap - expired | 1.25% |  |
Parent Company [Member] | Subordinated Debentures [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Subordinated Debt | $ 50,000,000 | 50,000,000 |
Long-term Debt | 50,000,000 |  |
Capital Trust V Preferred Securities Due in 2037 [Member] | Junior Subordinated Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt | 51,547,000 |  |
Total Long-Term Borrowings | $ 51,512,000 | $ 51,510,000 |
Fixed rate | 1.70% |  |
Capital Trust V Preferred Securities Due in 2037 [Member] | Junior Subordinated Debt [Member] | LIBOR [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, interest rate, stated rate inclusive of interest rate swap - expired | 1.48% |  |
Subordinated Debentures Due in November 2019 [Member] [Domain] | Subordinated Debentures [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Fixed rate |  | 4.75% |
Central Bancorp Capital Trust I Securities Due in 2034 [Member] | Junior Subordinated Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt | $ 5,258,000 |  |
Total Long-Term Borrowings | $ 5,258,000 | $ 5,258,000 |
Debt Instrument, interest rate, stated rate inclusive of interest rate swap - expired | 2.66% |  |
Central Bancorp Capital Trust I Securities Due in 2034 [Member] | Junior Subordinated Debt [Member] | LIBOR [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, interest rate, stated rate inclusive of interest rate swap - expired | 2.44% |  |
Line of Credit [Member] | Long-term Debt [Member] | Long-term Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt | $ 14,100,000 | 32,800,000 |
Federal Home Loan Bank Advances [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Federal home loan bank unused remaining available borrowing capacity | 1,600,000,000 | $ 1,400,000,000 |
Line of credit maximum borrowing capacity | $ 5,000,000 |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5086-111524 + Details
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