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RETIREMENT BENEFIT PLANS (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended
May 31, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]        
Gain (loss) recognized within accumulated other comprehensive loss   $ 7,000,000 $ 4,600,000  
Accumulated benefit obligation   60,300,000 61,500,000  
Benefit plans, assets   39,914,000 37,825,000 $ 30,770,000
Plan assets expected to be returned next twelve months   0    
Contributions expected to be paid to plan   2,300,000    
Total contributions made   8,800,000 6,700,000 $ 8,600,000
Defer payment and taxation, base salary, percentage (up to) 75.00%      
Defer payment and taxation, bonus and other eligible cash compensation, percentage (up to) 100.00%      
Deferred compensation plan, fair value of assets   3,800,000 $ 2,000,000  
France and Germany        
Defined Benefit Plan Disclosure [Line Items]        
Benefit plans, assets   $ 0