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DEBT (Long-Term Debt) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Oct. 20, 2016
Apr. 01, 2015
Debt Instrument [Line Items]        
Fair value of long-term debt $ 639,863 $ 776,655    
Carrying value of long-term debt $ 723,945 $ 717,855    
Senior Notes 2016 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount     $ 350,000  
Senior Notes [Member]        
Debt Instrument [Line Items]        
Debt, Weighted Average Interest Rate 3.30%      
Debt Instrument, Covenant Compliance As of June 30, 2022, the Company was in compliance with all of its debt covenants      
Weighted Average [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Term 11 years 10 months 24 days      
Senior Notes 2015 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount       $ 350,000
Minimum | Senior Notes [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount $ 50,000      
Debt Instrument, Interest Rate, Stated Percentage 2.75%      
Maximum | Senior Notes [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount $ 100,000      
Debt Instrument, Interest Rate, Stated Percentage 4.02%