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Hedging Activities And Financial Instruments (Details) - USD ($)
1 Months Ended 12 Months Ended
Jul. 31, 2020
Dec. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Jul. 08, 2019
Derivative [Line Items]          
De-designation of derivative instrument   $ 1,235,000      
Derivative financial instruments   (700,000)   $ (318,000)  
Accumulated other comprehensive loss to be reclassified to earnings in the next 12 months   721,000      
Not Designated as Hedging Instrument          
Derivative [Line Items]          
Foreign currency contracts   101,781,000   102,407,000  
Level 2          
Derivative [Line Items]          
Derivative financial instruments   (700,000)   (318,000)  
Level 2 | Designated as Hedging Instrument          
Derivative [Line Items]          
Derivative financial instruments   (700,000)   (318,000)  
Interest Rate Contract          
Derivative [Line Items]          
De-designation of derivative instrument $ 1,253,000        
Reclass into interest and other expense   1,235,000      
Changes in swap's fair value recognized in accumulated other comprehensive loss   721,000      
Interest Rate Contract | Designated as Hedging Instrument          
Derivative [Line Items]          
Notional interest rate contracts outstanding   $ 15,000,000   $ 40,000,000 $ 50,000,000
Floor interest rate (as a percentage)   0.00%      
Interest Rate Contract | Not Designated as Hedging Instrument          
Derivative [Line Items]          
Notional interest rate contracts outstanding     $ 15,000,000