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Note 7 - Interest-Bearing Deposits (Detail) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Time Deposits, $100,000 or More $ 547,600,000 $ 541,800,000
Deposits 2,268,084,000 1,989,071,000
Certificate of Deposit Account Registry Service [Member]
   
Deposits $ 100,900,000 $ 164,500,000