Rental Expense And Contractual Commitments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Leases, Operating [Abstract]
Rental expenses for continuing operations from the consecutive year	$ 3.6us-gaap_OperatingLeasesRentExpenseNet	$ 3.4us-gaap_OperatingLeasesRentExpenseNet	$ 3.6us-gaap_OperatingLeasesRentExpenseNet
Contractual obligations for plant construction and purchases of real property and equipment amounted	$ 4.9us-gaap_ContractualObligation

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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