Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Impairment of Long-Lived Assets
Impairment of long-lived assets		$ 0.0	$ 0.0	$ 0.0
Machinery and equipment | Minimum
Property, plant and equipment
Useful life		7 years
Machinery and equipment | Maximum
Property, plant and equipment
Useful life		10 years
Beverly Property Owner LLC | Sale leaseback obligation | Land and buildings
Property, plant and equipment
Lease term	22 years