Subsequent Events (Details) - 2017 Plan - Subsequent Events shares in Millions	1 Months Ended
Jan. 31, 2018 shares
Additional Shares
Subsequent Events
Common stock awards issued	0.1
Restricted stock
Subsequent Events
Common stock awards issued	2.1

Number of share instruments newly issued under a share-based compensation plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration