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Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events. On May 2, 2017, the Board of Directors declared a quarterly dividend payable to stockholders of record as of May 15, 2017, of the Company's Common Stock, and a dividend equivalent payable to holders of RSUs as of May 15, 2017, of $0.04 per share and per unit, payable on June 9, 2017. Refer to Note 6. for events occurring subsequent to the financial statement date related to the October 21, 2016, chemical release at the Company's Atchison facility.