Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Aug. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 147,688		$ 147,688			$ 129,841
Accumulated depreciation and amortization	(21,406)		(21,406)			(14,681)
Total	126,282		126,282			115,160
Depreciation and amortization	2,300	$ 2,100	6,800	$ 6,000
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	59,314		59,314			59,315
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	49,058		49,058			47,234
Computer software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	13,087		13,087			11,641
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,523		4,523			4,055
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,743		1,743			1,585
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,477		1,477			1,413
Land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	493		493			493
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	366		366			346
Buildings improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	184		184			86
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	17,443		17,443			$ 3,673
Heartland Pet Food Mfg.
Property, Plant and Equipment [Line Items]
Purchased industrial revenue bonds	$ 100		$ 100
City of Joplin, MO
Property, Plant and Equipment [Line Items]
Principal amount of industrial revenue bonds					$ 83,300