Subsequent Event Subsequent Event (Details) (Lithicon AS [Member], Lithicon AS [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Lithicon AS [Member] \| Lithicon AS [Member]
Subsequent Event [Line Items]
Percentage of voting interests acquired	100.00%
Acquisition Purchase Price	$ 68.0

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant