Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2017	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Long-lived asset impairment	$ 0	$ 0
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives		3 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives		25 years

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Name:	us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration