Allowance for Loan Losses Schedule of Troubled Debt Restructure Activity (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Receivables [Abstract]
Beginning balance	$ 25,849,000	$ 39,581,000
Restructured loans identified as TDRs	6,927,000	5,812,000
Protective advances and miscellaneous	986,000	138,000
Repayments and payoffs	(6,465,000)	(3,575,000)
Charge-offs	(217,000)	(13,781,000)
Transfers to other real estate owned	(95,000)	(2,326,000)
Ending balance	26,985,000	25,849,000
Change in Financing Receivable, Modifications, Recorded Investment	$ 1,100,000