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Fair Value Measurement: (Tables)
 6 Months Ended
Jun. 30, 2022
Fair Value Disclosures [Abstract]  
The following tables present our financial assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value

The following tables present our financial assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value.

 

                             
       Fair Value Measurements at June 30, 2022 
   Total   Quoted Prices in
Active Markets for
Identical Assets
(Level 1)		   Significant Other
Observable
Inputs
(Level 2)		   Significant
Unobservable
Inputs
(Level 3)		 
Assets:                
Short-term investments  $143,642   $16,839   $126,803   $— 
Interest rate swaps   4,081    —    4,081      
                     
Total assets  $147,723   $16,839   $130,884   $— 
Liabilities:                    
Foreign currency forward exchange contracts accounted for using hedge accounting  $3,609   $—   $3,609   $— 
Foreign currency forward exchange contracts not accounted for using hedge accounting   1,990    —    1,990   — 
                     
Total liabilities  $5,599   $—   $5,599   $— 

 

                             
       Fair Value Measurements at December 31, 2021 
   Total   Quoted Prices in
Active Markets for
Identical Assets
(Level 1)		   Significant Other
Observable
Inputs
(Level 2)		   Significant
Unobservable
Inputs
(Level 3)		 
Assets:                
Short-term investments  $160,014   $24,506   $135,508   $— 
Liabilities:                    
Foreign currency forward exchange contracts accounted for using hedge accounting  $1,982   $—   $1,982   $— 
Foreign currency forward exchange contracts not accounted for using hedge accounting   63    —    63    — 
Interest rate swaps   (234)   —    (234)   — 
                     
Total liabilities  $1,811   $—   $1,811   $—