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Changes in Accumulated Other Comprehensive Income by Component (Narrative) (Details) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Realized gains from the sale of available for sale securities | $ 3 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains

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

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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | duration