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Premises and Equipment (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Maximum [Member]
Jun. 30, 2008
Per Year Through 2016 [Member]
Jun. 30, 2008
Thereafter [Member]
Property, Plant and Equipment [Line Items]            
Depreciation and amortization expense $ 1,950,000 $ 1,890,000 $ 1,700,000      
Lease agreements expiring       20 years    
Rent expense 1,080,000 1,020,000 1,020,000      
Deferred gains on saleleaseback transaction         423,000 635,000
Expected intangible asset amortization for 2013 $ 0