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Goodwill (Tables)
6 Months Ended
Jun. 30, 2018
Intangible Asset Disclosure Text Block [Abstract]  
Schedule of Goodwill
Changes in the carrying amount of goodwill (in thousands):
 
Feed Ingredients
Food Ingredients
Fuel Ingredients
Total
Balance at December 30, 2017
 
 
 
 
Goodwill
$
848,167

$
344,471

$
124,369

$
1,317,007

Accumulated impairment losses
(15,914
)


(15,914
)
 
832,253

344,471

124,369

1,301,093

Goodwill acquired during year
19,554



19,554

Goodwill disposed of during year
(61,088
)


(61,088
)
Goodwill impaired during year

(461
)

(461
)
Foreign currency translation
(15,342
)
(6,483
)
(4,309
)
(26,134
)
Balance at June 30, 2018
 

 

 
 

Goodwill
791,291

337,988

120,060

1,249,339

Accumulated impairment losses
(15,914
)
(461
)

(16,375
)
 
$
775,377

$
337,527

$
120,060

$
1,232,964