Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Narrative (Details)

v3.8.0.1
Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Adjustments related to tax attributes assumed upon spin-off   $ 0.7
Tax expense resulting from remeasurement of deferred tax balances $ 0.8  
Decrease in effective tax rate   1.60%
Minimum | Manufacturing equipment    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   3 years
Minimum | Computer equipment    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   3 years
Minimum | Office furniture and equipment    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   5 years
Minimum | Tooling and engraving equipment    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   3 years
Minimum | Heavy production equipment    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   10 years
Minimum | Buildings    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   15 years
Minimum | Computer software    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   3 years
Maximum | Manufacturing equipment    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   15 years
Maximum | Computer equipment    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   5 years
Maximum | Office furniture and equipment    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   7 years
Maximum | Tooling and engraving equipment    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   7 years
Maximum | Heavy production equipment    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   15 years
Maximum | Buildings    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   30 years
Maximum | Computer software    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of property, plant, and equipment   7 years
Contractual Rights | Minimum    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of finite-lived intangible assets   5 years
Contractual Rights | Maximum    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of finite-lived intangible assets   50 years
Intellectual Property | Minimum    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of finite-lived intangible assets   2 years
Intellectual Property | Maximum    
Property, Plant and Equipment [Line Items]    
Estimated useful lives of finite-lived intangible assets   15 years