Summary of Significant Accounting Policies (Intangible Assets) (Details) - Maximum [Member]	12 Months Ended
Dec. 31, 2017
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	12 years
Patents and Others [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	20 years

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration