Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Impairment recorded				$ 56,166	$ 0	$ 0
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Amortization expense for intangible assets				14,500	$ 8,800	$ 6,400
Expected future annual amortization expense, 2016		$ 16,500		16,500
Expected future annual amortization expense, 2017		15,800		15,800
Expected future annual amortization expense, 2018		15,200		15,200
Expected future annual amortization expense, 2019		14,300		14,300
Expected future annual amortization expense, 2020		13,200		13,200
Grain
Finite-Lived Intangible Assets [Line Items]
Impairment recorded		$ 54,200		46,422
Plant Nutrient
Finite-Lived Intangible Assets [Line Items]
Impairment recorded			$ 2,000	$ 9,744
Customer list | Grain
Finite-Lived Intangible Assets [Line Items]
Impairment recorded	$ 1,500