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Derivative Instruments (Details) (USD $) In Thousands, unless otherwise specified		3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Interest rate swap [Member]	Sep. 30, 2011 Interest rate swap [Member]	Sep. 30, 2012 Interest rate swap [Member]	Sep. 30, 2011 Interest rate swap [Member]	Sep. 30, 2012 Interest rate swap [Member] Accrued Interest Payable and Other Liabilities [Member]	Dec. 31, 2011 Interest rate swap [Member] Accrued Interest Payable and Other Liabilities [Member]	Sep. 30, 2012 Interest rate swap [Member] Interest Expense Subordinated Debentures [Member]	Sep. 30, 2011 Interest rate swap [Member] Interest Expense Subordinated Debentures [Member]	Sep. 30, 2012 Interest rate swap [Member] Interest Expense Subordinated Debentures [Member]	Sep. 30, 2011 Interest rate swap [Member] Interest Expense Subordinated Debentures [Member]	Sep. 30, 2012 Interest rate swap [Member] Other Income [Member]	Sep. 30, 2011 Interest rate swap [Member] Other Income [Member]	Sep. 30, 2012 Interest rate swap [Member] Other Income [Member]	Sep. 30, 2011 Interest rate swap [Member] Other Income [Member]
Amounts and locations of activity related to the interest rate swaps designated as cash flow hedges within the Corporation's consolidated balance sheet and statement of income
Interest expense, Fair Value								$ (98)	$ (103)	$ (290)	$ (303)
Interest rate contract		(44)	(440)	(116)	(519)
Interest Rate Derivative Liabilities, at Fair Value	(1,848)					(1,848)	(1,669)
Other income												$ 0	$ 0	$ 0	$ 0

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44C

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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-Number 133

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

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