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RETIREMENT PLANS (Schedule of Benefit Plan Funded Status) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]    
Benefit obligation at beginning of year $ 34,534 $ 30,338
Service cost 751 696
Interest cost 1,080 1,213
Actuarial loss 4,405 3,603
Benefits paid (1,358) (1,316)
Projected benefit obligation at end of year 39,412 34,534
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Fair value of plan assets at beginning of year 44,292 39,680
Actual return on plan assets 2,403 5,928
Employer contribution 0 0
Benefits paid (1,358) (1,316)
Fair value of plan assets at end of year 45,337 44,292
Funded Status, included in other assets 5,925 9,758
Amounts recognized in accumulated other comprehensive income: Total net actuarial loss 13,221 9,147
Amounts recognized in accumulated other comprehensive income: Prior service cost 0 0
Total included in accumulated other comprehensive loss (pretax) $ 13,221 $ 9,147