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Term Debt (Narrative) (Details) (USD $)	12 Months Ended
Term Debt (Narrative) (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Term Debt [Abstract]
Term debt	$ 255,676,000	$ 262,760,000
FHLB advances unamortized purchase accounting adjustment	10,100,000
Federal home loan bank advances general debt obligations disclosures maximum outstanding	250,000,000	355,200,000
Federal home loan bank advances general debt obligations disclosures average outstanding	$ 245,800,000	$ 247,500,000
Average interest rate on borrowings	4.60%	4.40%

States the maximum total dollar amount of advances or credit lines available as of the Balance Sheet date from the Federal Home Loan Bank system.

States the weighted average interest rate applicable to the advances from the Federal Home Loan Bank outstanding as of the Balance Sheet date.