| **Investment Securities - Gross Gains on Sales and Redemptions of Available for Sale Securities and Other Than Temporary Impairment Losses Recognized (Details) (USD $)In Thousands, unless otherwise specified** | 3 Months Ended                                              |
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| **Sales and Redemptions of Available for Sale Securities:**                                                                                                                                                       |                                                        |   |
| Gross gains                                                                                                                                                                                                       | $ 1,025us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | $ 581us-gaap_AvailableForSaleSecuritiesGrossRealizedGains |

| X                                                                                                                                                                                              |
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| - Details**Name:**us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNetAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
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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**Name:**us-gaap_AvailableForSaleSecuritiesGrossRealizedGains**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |