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Components of Net Periodic Pension Cost (Narrative) (Details) (USD $) | 3 Months Ended
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Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items] |
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 400,000

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

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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration