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Restructuring (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2014 employees
Restructuring Cost and Reserve [Line Items] |
Reduction in employees | 200 us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated

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- Definition The expected number of positions to be eliminated as a result of restructuring activities. + References No definition available. + Details
Name: | us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration