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The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Assets:    
Short-term investments $ 37,735 $ 94,304
Interest rate swaps 3,949 3,909
Foreign currency forward exchange contracts not accounted for using hedge accounting   359
Foreign currency forward exchange contracts accounted for using hedge accounting   1,533
Total assets at fair value 41,684 100,105
Liabilities:    
Foreign currency forward exchange contracts not accounted for using hedge accounting 70  
Foreign currency forward exchange contracts accounted for using hedge accounting 48  
Total liabilities at fair value 118  
Fair Value, Inputs, Level 1 [Member]    
Assets:    
Short-term investments 8,821 12,868
Interest rate swaps 0 0
Foreign currency forward exchange contracts not accounted for using hedge accounting   0
Foreign currency forward exchange contracts accounted for using hedge accounting   0
Total assets at fair value 8,821 12,868
Liabilities:    
Foreign currency forward exchange contracts not accounted for using hedge accounting 0  
Foreign currency forward exchange contracts accounted for using hedge accounting 0  
Total liabilities at fair value 0  
Fair Value, Inputs, Level 2 [Member]    
Assets:    
Short-term investments 28,914 80,614
Interest rate swaps 3,949 3,909
Foreign currency forward exchange contracts not accounted for using hedge accounting   359
Foreign currency forward exchange contracts accounted for using hedge accounting   1,533
Total assets at fair value 32,863 86,415
Liabilities:    
Foreign currency forward exchange contracts not accounted for using hedge accounting 70  
Foreign currency forward exchange contracts accounted for using hedge accounting 48  
Total liabilities at fair value 118  
Fair Value, Inputs, Level 3 [Member]    
Assets:    
Short-term investments 0 822
Interest rate swaps 0 0
Foreign currency forward exchange contracts not accounted for using hedge accounting   0
Foreign currency forward exchange contracts accounted for using hedge accounting   0
Total assets at fair value 0 $ 822
Liabilities:    
Foreign currency forward exchange contracts not accounted for using hedge accounting 0  
Foreign currency forward exchange contracts accounted for using hedge accounting 0  
Total liabilities at fair value $ 0