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Borrowed Funds (Summary of Short Term Borrowings) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Borrowed Funds [Abstract]
Outstanding at end of period	$ 50,954	$ 39,257
Weighted average interest rate at end of period	0.15%	0.34%
Maximum amount outstanding as of any month end	54,054	52,367
Average amount outstanding	$ 44,012	$ 38,812
Approximate weighted average rate during the period	0.15%	0.34%

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- Definition

Weighted average interest rate of debt outstanding.

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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period.

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No definition available.

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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Weighted average interest rate of short-term debt outstanding.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

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