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Fair Value and Interest Rate Risk (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Fair Value and Interest Rate Risk (Textual) [Abstract]
Short-term borrowings	90 days
Transfer of assets between level 1 , 2 or 3	$ 0	$ 0

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- Details

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- Definition

Fair value assets level 1 to level 2 transfers amount.

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No definition available.

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- Definition

Maturing period of borrowings under short term repurchase agreements and other short term borrowings.

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No definition available.

+ Details

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