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FAIR VALUES OF FINANCIAL INSTRUMENTS: (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Valuation allowance for impaired loans $ 7,609,000 $ 4,273,000
Provision for impaired loan losses 4,200,000 3,300,000
Other Real Estate Commercial loan | Level 3
   
Fair Value 5,700,000 2,800,000
Other Real Estate Residential Loan | Level 3
   
Fair Value 2,000,000 2,200,000
Municipal Securities | Level 3
   
Fair Value 1,200,000 9,700,000
Other Real Estate | Level 3
   
Fair Value 7,722,000 5,000,000
Assets fair value adjustment 234,000 892,000
Impaired Loans | Level 3
   
Fair Value 25,948,000 28,400,000
Valuation allowance for impaired loans $ 7,600,000 $ 4,300,000