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Summary of Significant Accounting Policies - Premises and Equipment (Details) | 12 Months Ended
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Dec. 31, 2014
Buildings | Minimum |
Premises and equipment |
Useful lives | 25 years
Buildings | Maximum |
Premises and equipment |
Useful lives | 40 years
Building improvements | Minimum |
Premises and equipment |
Useful lives | 3 years
Building improvements | Maximum |
Premises and equipment |
Useful lives | 15 years
Furniture and equipment | Minimum |
Premises and equipment |
Useful lives | 3 years
Furniture and equipment | Maximum |
Premises and equipment |
Useful lives | 10 years

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |