Acquisition - Valuation of fair value of assets acquired, and liabilities assumed, purchase price for Dupont State Bank acquisition (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
Nov. 09, 2012	Dec. 31, 2012
Fair value of liabilities assumed:
Bargain purchase gain		$ 988
Dupont State Bank
Business Acquisition [Line Items]
Consideration: Cash paid	5,700	5,700
Fair value of assets acquired:
Cash and cash equivalents		14,893
Investment securities available-for-sale		12,139
Loans		52,125
Property and equipment		3,160
Federal Home Loan Bank Stock		369
Real estate, held for sale		334
Core deposit intangible		514
Interest receivable		364
Other assets		1,243
Total assets acquired		85,141
Fair value of liabilities assumed:
Deposits		78,300
Interest payable		69
Other liabilities		84
Total liabilities assumed		78,453
Bargain purchase gain	$ (988)	$ (988)

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The amount of acquisition cost of a business combination allocated to federal home loan bank stock.

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The amount of acquisition cost of a business combination allocated to loan.

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The amount of acquisition cost of a business combination allocated to deposit of the acquired entity.

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The amount of acquisition cost of a business combination allocated to Interest payable of the acquired entity.

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Amount of cash paid to acquire the entity.

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The amount of acquisition cost of a business combination allocated to assets acquired.

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The amount of acquisition cost of a business combination allocated to assets expected to be sold.

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The amount of cash and cash equivalents acquired in a business combination.

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The amount of acquisition cost of a business combination allocated to marketable securities.

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The amount of acquisition cost of a business combination allocated to receivables.

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Amount of acquisition cost of a business combination allocated to assets, excluding financial assets and goodwill, lacking physical substance.

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The amount of acquisition cost of a business combination allocated to liabilities assumed.

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Amount of acquisition cost of a business combination allocated to other assets not separately disclosed in the balance sheet.

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Amount of acquisition cost of a business combination allocated to other liabilities not separately disclosed in the balance sheet.

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The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.

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In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

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