Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Depreciation and Amortization expense	$ 10,500	$ 9,200	$ 8,200
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	358,388	186,064
Accumulated depreciation and amortization	(31,984)	(23,832)
Property, plant, and equipment, Net	326,404	162,232
Purchased industrial revenue bonds		55,000
Building [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	59,314	59,314
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	52,383	49,079
Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	17,635	14,849
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,855	4,599
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,876	1,772
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,590	1,477
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	493	493
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	395	401
Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	613	189
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	219,234	53,891
Heartland and Jasper County, MO [Member]
Property, Plant and Equipment [Line Items]
Principal amount of industrial revenue bonds				$ 55,000
City of Joplin, MO [Member]
Property, Plant and Equipment [Line Items]
Principal amount of industrial revenue bonds			$ 83,300
Heartland Pet Food Mfg. [Member] | Heartland and Jasper County, MO [Member]
Property, Plant and Equipment [Line Items]
Purchased industrial revenue bonds	55,000
Heartland Pet Food Mfg. [Member] | City of Joplin, MO [Member]
Property, Plant and Equipment [Line Items]
Purchased industrial revenue bonds	$ 31,900	$ 10,800