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OTHER LONG-TERM DEBT (Credit Line) (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Line of Credit Facility [Line Items]      
Outstanding capital lease liability $ 139,037 $ 159,650  
Lease liability 36,282 34,863  
Operating lease cost 7,069    
TSNP [Member]      
Line of Credit Facility [Line Items]      
Maximum borrowing amount 70,000    
Borrowing capacity 56,000    
Letters of credit outstanding amount $ 500    
TSNP [Member] | Prime Rate [Member] | Minimum [Member]      
Line of Credit Facility [Line Items]      
Basis spread over variable interest rate 0.00%    
TSNP [Member] | Prime Rate [Member] | Maximum [Member]      
Line of Credit Facility [Line Items]      
Basis spread over variable interest rate 0.50%    
TSNP [Member] | LIBOR [Member] | Minimum [Member]      
Line of Credit Facility [Line Items]      
Basis spread over variable interest rate 1.25%    
TSNP [Member] | LIBOR [Member] | Maximum [Member]      
Line of Credit Facility [Line Items]      
Basis spread over variable interest rate 1.75%    
Office space operating facilities and vehicles [Member]      
Line of Credit Facility [Line Items]      
Operating lease cost $ 7,535 $ 7,627 $ 8,045
TPSCo [Member]      
Line of Credit Facility [Line Items]      
Annual interest rate of lease agreement 2.00%    
TPSCo [Member] | Term Loan 2018 [Member]      
Line of Credit Facility [Line Items]      
Basis spread over variable interest rate 1.95%