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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events During October 2019, the Company reached an agreement with the EPA and the Department of Justice related to the Atchison Chemical Release (Note 7). On October 29, 2019, the Company’s Board of Directors declared a quarterly dividend payable to stockholders of record as of November 14, 2019, of the Company’s Common Stock, and a dividend equivalent payable to holders of certain RSUs as of November 14, 2019, of $0.10 per share and per unit, payable on November 26, 2019.