Property, Plant and Equipment - Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) lease_renewal_option	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2017 USD ($)
Property, Plant and Equipment [Line Items]
Carrying value property, plant and equipment, net	$ 322.6	$ 321.4		$ 321.4
New Facility Lease
Property, Plant and Equipment [Line Items]
Lease term	15 years
Future rental payments	$ 1.1
Annual rent escalation, percent	2.50%
Montgomery Lease
Property, Plant and Equipment [Line Items]
Number of lease renewal options | lease_renewal_option	3
Lease renewal term	5 years
Initial cost			$ 13.2
Gain related to capital expenditures incurred to date		5.4		8.1
Closed Facilities | U.S.
Property, Plant and Equipment [Line Items]
Carrying value property, plant and equipment, net	$ 1.2	$ 1.1		$ 1.1