Commitments and Contingencies (Textuals) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Leased Assets [Line Items]
Contingent consideration, payable period	5 years
Contingent consideration, estimated outcome, low	$ 0.0
Contingent consideration, estimated outcome, high	3.7
Unrecorded Unconditional Purchase Obligation [Line Items]
Outstanding unconditional contractual commitments for the purchase of raw materials, utilities and equipment	249.1
Outstanding uncondintional contractual commitments due to be paid in 2020		$ 61.3
Insurance Claims [Member]
Loss Contingencies [Line Items]
Accrual for insurance obligations	3.2
Amount reimbursable by the insurance company	0.9
Revolving credit facility, due 2024 [Domain] | Letter of Credit [Member]
Loss Contingencies [Line Items]
Letters of credit supporting the reimbursement of workers' compensation and other claims	$ 2.5