Organization and Summary of Significant Accounting Policies (Intangibles and Earnings Per Share Information) (Details)	12 Months Ended
Dec. 31, 2017 USD ($)
Indefinite lived intangible assets
Intangible Assets
Intangible assets with indefinite useful lives	$ 0
Customer relationships
Intangible Assets
Useful life	5 years

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Name:	us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant