v2.4.0.6
Commitments and Contingent Liabilities (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Sep. 30, 2004
Minimum future rental payments:        
2012 $ 4,077,000      
2013 3,927,000      
2014 3,615,000      
2015 3,046,000      
2016 1,604,000      
Thereafter 5,678,000      
Total minimum payments 21,947,000      
Operating Leases, Rent Expense, Sublease Rentals 655,000 591,000 602,000  
Operating Leases, Rent Expense, Net 4,600,000 4,500,000 3,500,000  
Deferred Gain on Sale of Property 234,000 317,000   1,300,000
Commitments to Extend Credit [Member]
       
Minimum future rental payments:        
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability 709,900,000 622,800,000    
Standby Letters of Credit [Member]
       
Minimum future rental payments:        
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability 30,900,000 31,200,000    
Commercial Letter of Credit [Member]
       
Minimum future rental payments:        
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability $ 243,000 $ 0