Property, Plant and Equipment, net - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Depreciation expense recorded	$ 1.3	$ 2.1
Rent received from leases	0.3	0.3
Future minimum rent payments due in 2018	0.2
Future minimum rent payments due in 2019	0.1
Rental expense on operating leases	$ 3.0	$ 1.6
Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	25 years
Building and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Building and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	25 years
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	8 years