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Inventory (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Inventory [Line Items]    
Inventory $ 24,492 $ 26,563
Supplies, semen and embryos    
Inventory [Line Items]    
Inventory 1,410 1,402
Work in process    
Inventory [Line Items]    
Inventory 6,240 6,290
Livestock    
Inventory [Line Items]    
Inventory 16,062 16,907
Feed    
Inventory [Line Items]    
Inventory $ 780 $ 1,964