Quarterly report pursuant to Section 13 or 15(d)

Acquisition Narrative (Details)

v3.10.0.1
Acquisition Narrative (Details)
$ in Millions
9 Months Ended
Sep. 30, 2018
USD ($)
Business Acquisition [Line Items]  
Effective date of acquisition Nov. 01, 2017
Alumet [Member]  
Business Acquisition [Line Items]  
Consideration transferred $ 41.7
Finite-lived intangibles acquired 1.7
Customer Relationships [Member] | Alumet [Member]  
Business Acquisition [Line Items]  
Finite-lived intangibles acquired $ 1.0
Acquired finite-lived intangible assets, weighted average useful life 15 years
Trade Names [Member] | Alumet [Member]  
Business Acquisition [Line Items]  
Finite-lived intangibles acquired $ 0.3
Acquired finite-lived intangible assets, weighted average useful life 15 years
Noncompete Agreements [Member] | Alumet [Member]  
Business Acquisition [Line Items]  
Finite-lived intangibles acquired $ 0.2
Acquired finite-lived intangible assets, weighted average useful life 2 years
Leases, Acquired-in-Place, Market Adjustment [Member] | Alumet [Member]  
Business Acquisition [Line Items]  
Finite-lived intangibles acquired $ 0.2
Acquired finite-lived intangible assets, weighted average useful life 2 years 6 months