Share-Based Compensation Plans (Summary Of Restricted Stock Units And Performance Share Units Activity) (Details)	9 Months Ended
Sep. 30, 2019 $ / shares shares
RSUs [Member]
Granted, Number of Shares \| shares	21,970
Granted, Weighted Average Market Price at Grant Date \| $ / shares	$ 27.17
PSUs [Member]
Granted, Number of Shares \| shares	52,976
Granted, Weighted Average Market Price at Grant Date \| $ / shares	$ 25.49

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration