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Settlement Agreement (Details) (Other Income [Member], USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2013
Gain Contingencies [Line Items] |  |  |  |  |
Cash settlement payment | $ 0 us-gaap_GainLossRelatedToLitigationSettlement | $ 0 us-gaap_GainLossRelatedToLitigationSettlement | $ 43,429 us-gaap_GainLossRelatedToLitigationSettlement | $ 0 us-gaap_GainLossRelatedToLitigationSettlement |
Positive Outcome of Litigation [Member] |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |
Cash settlement payment |  |  |  |  | $ 43,429 us-gaap_GainLossRelatedToLitigationSettlement / us-gaap_GainContingenciesByNatureAxis = us-gaap_PositiveOutcomeOfLitigationMember / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherIncomeMember

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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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