Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS (Schedule of Components of SERP's Periodic Benefit Cost, the Funded Status of the Plan, Amounts Recognized in the Consolidated Statements of Financial Condition, and Major Assumptions) (Details)

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EMPLOYEE BENEFIT PLANS (Schedule of Components of SERP's Periodic Benefit Cost, the Funded Status of the Plan, Amounts Recognized in the Consolidated Statements of Financial Condition, and Major Assumptions) (Details) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Change in Projected Benefit Obligation:                  
Actuarial Loss (Gain)             $ (4,905,000) $ (4,223,000) $ (31,339,000)
Components of Net Periodic Benefit Costs:                  
Defined benefit plan settlement $ 0 $ (209,000) $ 291,000 $ (378,000) $ 291,000 $ (480,000) 291,000 (2,321,000) (3,072,000)
Supplemental Executive Retirement Plan ("SERP") [Member]                  
Change in Projected Benefit Obligation:                  
Benefit Obligation at Beginning of Year $ 10,948,000 $ 13,534,000 $ 10,948,000 $ 13,534,000 $ 10,948,000 $ 13,534,000 10,948,000 13,534,000 13,402,000
Service Cost             18,000 31,000 35,000
Interest Cost             501,000 315,000 243,000
Actuarial Loss (Gain)             201,000 (2,932,000) (146,000)
Net Settlements             (2,464,000) 0 0
Projected Benefit Obligation at End of Year             9,204,000 10,948,000 13,534,000
Funded Status of Plan and Accrued Liability Recognized at End of Year:                  
Other Liabilities             9,204,000 10,948,000 13,534,000
Accumulated Benefit Obligation at End of Year             8,943,000 10,887,000 12,803,000
Components of Net Periodic Benefit Costs:                  
Service Cost             18,000 31,000 35,000
Interest Cost             501,000 315,000 243,000
Amortization of Prior Service Cost             151,000 277,000 277,000
Net Loss Amortization             (531,000) 718,000 970,000
Defined benefit plan settlement             291,000 0 0
Net Periodic Benefit Cost             $ (152,000) $ 1,341,000 $ 1,525,000
Weighted-Average Assumptions Used to Determine Benefit Obligation:                  
Discount Rate (in percent)             5.11% 5.45% 2.80%
Rate of Compensation Increase (in percent)             5.10% 5.10% 4.40%
Measurement Date             Dec. 31, 2023 Dec. 31, 2022 Dec. 31, 2021
Weighted-Average Assumptions Used to Determine Benefit Cost:                  
Discount Rate (in percent)             5.45% 2.80% 2.38%
Rate of Compensation Increase (in percent)             5.10% 4.40% 4.00%
Amortization Amounts from Accumulated Other Comprehensive Loss:                  
Net Actuarial Loss (Gain)             $ 201,000 $ (2,932,000) $ (146,000)
Prior Service (Benefit) Cost             (151,000) (277,000) (219,000)
Net Gain (Loss)             531,000 (718,000) (970,000)
Settlement Gain             291,000 0 0
Deferred Tax (Benefit) Expense             (222,000) 995,000 154,000
Other Comprehensive Gain, net of tax             650,000 (2,932,000) (1,181,000)
Amounts Recognized in Accumulated Other Comprehensive Loss:                  
Net Actuarial (Loss) Gain             (753,000) (1,775,000) 1,875,000
Prior Service Cost             0 151,000 429,000
Deferred Tax Benefit (Expense)             191,000 412,000 (584,000)
Accumulated Other Comprehensive (Loss) Gain, net of tax             $ (562,000) $ (1,212,000) $ 1,720,000