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Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Contingencies
Uncertain tax positions	$ 1,678us-gaap_UnrecognizedTaxBenefits	$ 1,901us-gaap_UnrecognizedTaxBenefits	$ 2,384us-gaap_UnrecognizedTaxBenefits
Inventories
Schedule of Contingencies
Long-term purchase commitment, amount	$ 3,830us-gaap_LongTermPurchaseCommitmentAmount / us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = us-gaap_InventoriesMember

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- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

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- Definition

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

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