Commitments and Contingencies (Details) $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($)	Apr. 07, 2017 claim	Mar. 06, 2017 claim
Commitments and Contingencies Disclosure [Abstract]
Number of class action lawsuits \| claim		1	2
Incremental charge based on current estimate of probable cost of settling litigation, pre-tax \| $	$ 4.7

Number of pending claims pertaining to a loss contingency.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant