Fair Value Measurements Fair Value Measurements (Details) - Fair Value, Measurements, Nonrecurring [Member] $ in Thousands	Dec. 31, 2016 USD ($)	[1]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 11,210
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 11,210

[1] Included in other assets and liabilities are deferred compensation assets, ethanol risk management contracts, and foreign exchange derivative contracts (Level 1), interest rate derivatives (Level 2), and contingent consideration to the former owners of Kay Flo Industries, Inc (Level 3)