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RETIREMENT BENEFITS (Defined Benefit Retirement Plan) (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Nov. 30, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Change in plan assets, at fair value:        
Employer contributions     $ 50  
Pension Plan        
Change in benefit obligation:        
Benefit obligation at beginning of year   $ 0 20,420  
Interest cost     212 $ 485
Actuarial gains     (1,766)  
Benefits paid     (5,398)  
Annuity purchase     (13,468)  
Benefit obligation at end of the year     0 20,420
Change in plan assets, at fair value:        
Fair value of plan assets at beginning of year   0 20,785  
Actual return on plan assets     (1,969)  
Benefits paid     (5,398)  
Annuity purchase     (13,468)  
Fair value of plan assets at end of year     0 20,785
Funded status at end of year     0  
Amounts recognized in AOCI:        
Net actuarial losses     0  
Components of net periodic benefit cost:        
Interest cost     212 485
Expected return on plan assets     (207) (549)
Amortization of net actuarial losses     225 701
Settlement     4,884 0
Net periodic benefit cost     $ 5,114 $ 637
Net periodic cost actuarial assumptions:        
Weighted-average discount rate     2.40% 2.30%
Expected long-term rate of return on plan assets     2.30% 2.70%
Pension Plan | Maximum        
Components of net periodic benefit cost:        
Settlement $ 4,900      
SERPs        
Change in benefit obligation:        
Benefit obligation at beginning of year   9,220 $ 12,297  
Interest cost   448 301 $ 264
Actuarial gains   181 (2,960)  
Benefits paid   (575) (418)  
Benefit obligation at end of the year   9,274 9,220 12,297
Change in plan assets, at fair value:        
Fair value of plan assets at beginning of year   0 0  
Employer contributions   575 418  
Benefits paid   (575) (418)  
Fair value of plan assets at end of year   0 0 0
Funded status at end of year   (9,274) (9,220)  
Amounts recognized in AOCI:        
Net transition obligation   0 (7)  
Net actuarial losses   106 701  
Total amounts recognized in AOCI   $ 106 $ 694  
Benefit obligation actuarial assumptions:        
Weighted-average discount rate   4.80% 5.00%  
Components of net periodic benefit cost:        
Interest cost   $ 448 $ 301 264
Amortization of net actuarial (gains) losses   (74) 79 335
Amortization of net transition obligation   7 18 18
Net periodic benefit cost   $ 381 $ 398 $ 617
Net periodic cost actuarial assumptions:        
Weighted-average discount rate   5.10% 2.70% 2.10%