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Fair Value Measurements (Tables)
6 Months Ended
Jun. 29, 2019
Fair Value Measurements [Abstract]  
Fair Value of Assets and Liabilities Carried at Fair Value Measured on Recurring Basis
The following table provides the financial assets and liabilities carried at fair value measured on a recurring basis:


 
Total
Fair Value
   
Level 1
   
Level 2
   
Level 3
 
June 29, 2019
                       
Assets:
                       
Assets held in rabbi trusts
 
$
49,615
   
$
32,786
   
$
16,829
   
$
-
 
Available for sale securities
 
$
4,431
     
4,431
     
-
     
-
 
   
$
54,046
   
$
37,217
   
$
16,829
   
$
-
 
Liabilities:
                               
Embedded derivative - convertible debentures due 2040
 
$
-
   
$
-
   
$
-
   
$
-
 
Embedded derivative - convertible debentures due 2041
 
$
(20
)
   
-
     
-
     
(20
)
   
$
(20
)
 
$
-
   
$
-
   
$
(20
)
December 31, 2018
                               
Assets:
                               
Assets held in rabbi trusts
 
$
41,770
   
$
26,278
     
15,492
   
$
-
 
Available for sale securities
 
$
4,309
     
4,309
     
-
     
-
 
   
$
46,079
   
$
30,587
   
$
15,492
   
$
-
 
Liabilities:
                               
Embedded derivative - convertible debentures due 2040
 
$
(1
)
 
$
-
   
$
-
   
$
(1
)
Embedded derivative - convertible debentures due 2041
 
$
(67
)
   
-
     
-
     
(67
)
Embedded derivative - convertible debentures due 2042
 
$
(2
)
   
-
     
-
     
(2
)
   
$
(70
)
 
$
-
   
$
-
   
$
(70
)