Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS (Schedule of Components of Pension Expense, 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 Pension Expense, 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:                  
Net Loss Settlements $ 0 $ 209,000 $ (291,000) $ 378,000 $ (291,000) $ 480,000 (291,000) 2,321,000 3,072,000
Defined benefit pension plan [Member]                  
Change in Projected Benefit Obligation:                  
Benefit Obligation at Beginning of Year 108,151,000 172,508,000 108,151,000 172,508,000 108,151,000 172,508,000 108,151,000 172,508,000 212,566,000
Service Cost             3,488,000 6,289,000 6,971,000
Interest Cost             5,831,000 4,665,000 4,885,000
Actuarial Loss (Gain)             6,936,000 (39,962,000) (14,934,000)
Benefits Paid             (3,843,000) (2,139,000) (2,087,000)
Expenses Paid             (276,000) (416,000) (259,000)
Settlements             0 (32,794,000) (34,634,000)
Projected Benefit Obligation at End of Year             120,287,000 108,151,000 172,508,000
Change in Plan Assets:                  
Fair Value of Plan Assets at Beginning of Year $ 104,276,000 $ 165,274,000 $ 104,276,000 $ 165,274,000 $ 104,276,000 $ 165,274,000 104,276,000 165,274,000 171,775,000
Actual Return (Loss) on Plan Assets             19,138,000 (25,649,000) 30,479,000
Employer Contributions             6,000,000 0 0
Benefits Paid             (3,843,000) (2,139,000) (2,087,000)
Expenses Paid             (276,000) (416,000) (259,000)
Settlements             0 (32,794,000) (34,634,000)
Fair Value of Plan Assets at End of Year             125,295,000 104,276,000 165,274,000
Funded Status of Plan and Accrued Liability Recognized at End of Year:                  
Other (Assets)             (5,008,000)    
Other Liabilities               3,875,000 7,234,000
Accumulated Benefit Obligation at End of Year             102,642,000 91,770,000 149,569,000
Components of Net Periodic Benefit Costs:                  
Service Cost             3,488,000 6,289,000 6,971,000
Interest Cost             5,831,000 4,665,000 4,885,000
Expected Return on Plan Assets             (6,805,000) (10,701,000) (11,147,000)
Amortization of Prior Service Costs             5,000 15,000 15,000
Net Loss Amortization             934,000 1,713,000 6,764,000
Net Loss Settlements             0 2,321,000 3,072,000
Net Periodic Benefit Cost             $ 3,453,000 $ 4,302,000 $ 10,560,000
Weighted-average assumptions used to determine benefit obligations:                  
Discount Rate (in percent)             5.29% 5.63% 3.11%
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)             5.63% 3.11% 2.88%
Expected Return on Plan Assets (in percent)             6.75% 6.75% 6.75%
Rate of Compensation Increase (in percent)             5.10% 4.40% 4.00%
Amortization Amounts from Accumulated Other Comprehensive Loss:                  
Net Actuarial Loss (Gain)             $ (5,397,000) $ (3,612,000) $ (34,265,000)
Prior Service Cost             (5,000) (15,000) (15,000)
Net Loss             (934,000) (4,034,000) (9,836,000)
Deferred Tax (Benefit) Expense             1,606,000 1,942,000 11,183,000
Other Comprehensive Gain, net of tax             (4,730,000) (5,719,000) (32,933,000)
Amounts Recognized in Accumulated Other Comprehensive Loss:                  
Net Actuarial Losses             1,322,000 7,653,000 15,300,000
Prior Service Cost             0 5,000 20,000
Deferred Tax Benefit (Expense)             (335,000) (1,941,000) (3,884,000)
Accumulated Other Comprehensive Loss, net of tax             $ 987,000 $ 5,717,000 $ 11,436,000