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Fair Value and Equity Investments (Tables)
9 Months Ended
Sep. 30, 2021
Fair Value and Equity Investments [Abstract]  
Assets (Liabilities) Measured at Fair Value on a Recurring Basis
The following tables present the fair value hierarchy for those assets and liabilities measured at fair value on a recurring basis (U.S. dollars in thousands):

 
Fair Value at September 30, 2021
 
   
Level 1
   
Level 2
   
Level 3
   
Total
 
Financial assets (liabilities):
                       
Cash equivalents and current investments
 
$
74,360
   
$
   
$
   
$
74,360
 
Derivative financial instruments asset
   
     
4,395
     
     
4,395
 
Life insurance contracts
   
     
     
48,625
     
48,625
 
Derivative financial instruments liability
   
     
(112
)
   
     
(112
)
Contingent consideration
   
     
     
(12,132
)
   
(12,132
)
Total
 
$
74,360
   
$
4,283
   
$
36,493
   
$
115,136
 

 
Fair Value at December 31, 2020
 
   
Level 1
   
Level 2
   
Level 3
   
Total
 
Financial assets (liabilities):
                       
Cash equivalents and current investments
 
$
56,628
   
$
   
$
   
$
56,628
 
Derivative financial instruments asset
   
     
1,145
     
     
1,145
 
Life insurance contracts
   
     
     
45,453
     
45,453
 
Derivative financial instruments liability
   
     
(105
)
   
     
(105
)
Contingent consideration
   
     
     
(3,125
)
   
(3,125
)
Total
 
$
56,628
   
$
1,040
   
$
42,328
   
$
99,996
 
Changes in Fair Value of Level 3 Marketable Securities
The following table provides a summary of changes in fair value of the Company’s Level 3 life insurance contracts (U.S. dollars in thousands):

Beginning balance at January 1, 2021
 
$
45,453
 
Actual return on plan assets
   
3,172
 
Purchase and issuances
   
7,016
 
Sales and settlements
   
(7,016
)
Transfers into Level 3
   
 
Ending balance at September 30, 2021
 
$
48,625
 
Changes in Fair Value of Level 3 Contingent Consideration
The following table provides a summary of changes in fair value of the Company’s Level 3 contingent consideration (U.S. dollars in thousands):

Beginning balance at January 1, 2021
 
$
(3,125
)
Additions from acquisitions
   
(8,702
)
Changes in fair value of contingent consideration
   
(305
)
Ending balance at September 30, 2021
 
$
(12,132
)