Income Taxes (Narrative) (Details) - Federal And State [Member]	9 Months Ended
Sep. 30, 2018
Minimum [Member]
Income Tax Contingency [Line Items]
Open tax year for examinations	2015
Maximum [Member]
Income Tax Contingency [Line Items]
Open tax year for examinations	2017

Tax year that remains open to examination under enacted tax laws, in CCYY format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

Name:	us-gaap_OpenTaxYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration