Consolidated Statement Of Changes In Stockholders' Equity (Parenthetical)	9 Months Ended
Sep. 30, 2018 shares
Consolidated Statement Of Changes In Stockholders' Equity [Abstract]
Issuance of stock based incentive plan shares, forfeitures	727

Net number of share options (or share units) granted during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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