Business Interruption and Insurance Recovery (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Business Interruption and Insurance Recovery [Abstract]
Operating Insurance and Claims Costs, Production	$ 2.9	$ 2.9	$ 8.5
Deductible and claims costs			3.5
Property insurance claim payment			5.0
Insurance claim receivable	$ 1.4		$ 1.5

Insurance and claims costs directly related to goods produced and sold, or services rendered, during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Name:	us-gaap_OperatingInsuranceAndClaimsCostsProduction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration