Basis and Summary of Significant Accounting Policies - Hurricane Impact (Details) $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($)
Accounting Policies [Abstract]
Partial cash payment from insurer	$ 2.7
Insurance proceeds received, before tax	0.9
Insurance settlements receivable	$ 0.7

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Name:	us-gaap_InsuranceRecoveries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration