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Borrowed Funds (Summary of Short Term Borrowings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Borrowed Funds [Abstract]
Outstanding at end of period	$ 34,576us-gaap_ShortTermBorrowings	$ 39,801us-gaap_ShortTermBorrowings	$ 39,801us-gaap_ShortTermBorrowings
Weighted average interest rate at end of period	0.15%us-gaap_ShortTermDebtWeightedAverageInterestRate	0.15%us-gaap_ShortTermDebtWeightedAverageInterestRate
Maximum amount outstanding as of any month end	34,576us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount	53,819us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
Average amount outstanding	$ 35,220us-gaap_ShorttermDebtAverageOutstandingAmount	$ 45,702us-gaap_ShorttermDebtAverageOutstandingAmount
Approximate weighted average rate during the period	0.15%us-gaap_DebtWeightedAverageInterestRate	0.13%us-gaap_DebtWeightedAverageInterestRate

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

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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)

-Number 210

-Section 02

-Paragraph 19

-Subparagraph a

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-Publisher SEC

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-Number 210

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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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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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Industry Guide

-Number 3

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- Definition

Weighted average interest rate of short-term debt outstanding.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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