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Note 5 - Loans and Allowance for Credit Losses (Detail) - Impaired loans (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Commercial Real Estate Loans [Member]
  
Recorded Investment$ 1,473 
Unpaid Principal Balance1,473 
Related Allowance933 
Commercial Real Estate Loans [Member]
  
Recorded Investment33,90347,081
Unpaid Principal Balance48,57569,627
Related Allowance933 
Commercial Real Estate Loans [Member]
  
Recorded Investment32,43047,081
Unpaid Principal Balance47,10269,627
Construction [Member]
  
Recorded Investment3,1833,700
Unpaid Principal Balance3,1833,700
Related Allowance1,8511,365
Construction [Member]
  
Recorded Investment9,13221,339
Unpaid Principal Balance17,21739,944
Related Allowance1,8511,365
Construction [Member]
  
Recorded Investment5,94917,639
Unpaid Principal Balance14,03436,244
Commercial [Member]
  
Recorded Investment9,05422,392
Unpaid Principal Balance14,68935,127
Commercial [Member]
  
Recorded Investment9,05422,392
Unpaid Principal Balance14,68935,127
Consumer Installment And Other [Member]
  
Recorded Investment2,9732,192
Unpaid Principal Balance3,6403,077
Consumer Installment And Other [Member]
  
Recorded Investment2,9732,192
Unpaid Principal Balance3,6403,077
Residential Real Estate Loans [Member]
  
Recorded Investment 449
Unpaid Principal Balance 451
Residential Real Estate Loans [Member]
  
Recorded Investment 449
Unpaid Principal Balance $ 451