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Note 12 - Fair Value (Detail) - Financial Instruments Carried At Fair Value On A Recurring Basis By Caption On The Consolidated Balance Sheets And By Valuation Hierarchy (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Securities available-for-sale    
Securities Available-For-Sale $ 178,282 $ 172,389
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 75,913 92,199
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 75,913 92,199
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 13,401 5,706
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 13,401 5,706
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 6,352 6,141
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 6,352 6,141
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 2 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 67,432 53,739
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 3 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 67,432 53,739
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Inputs, Level 2 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 677 667
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Inputs, Level 3 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 677 667
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 143 102
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 143 102
CRA Funds [Member] | Fair Value, Inputs, Level 1 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 14,364 13,835
CRA Funds [Member] | Fair Value, Inputs, Level 3 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 14,364 13,835
Derivative Interest Rate Cap (Member) | Fair Value, Inputs, Level 2 [Member]
   
Derivative assets    
Interest rate cap 55  
Derivative Interest Rate Cap (Member) | Fair Value, Inputs, Level 3 [Member]
   
Derivative assets    
Interest rate cap 55  
Derivative Interest Rate Swap (Member) | Fair Value, Inputs, Level 2 [Member]
   
Derivative liabilities    
Derivative Liabilities 1,927 1,992
Derivative Interest Rate Swap (Member) | Fair Value, Inputs, Level 3 [Member]
   
Derivative liabilities    
Derivative Liabilities 1,927 1,992
Fair Value, Inputs, Level 1 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 14,364 13,835
Derivative assets    
Total assets measured at fair value on a recurring basis 14,364 13,835
Fair Value, Inputs, Level 2 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 163,918 158,554
Derivative assets    
Interest rate cap   194
Total assets measured at fair value on a recurring basis 163,973 158,748
Fair Value, Inputs, Level 3 [Member]
   
Securities available-for-sale    
Securities Available-For-Sale 178,282 172,389
Derivative assets    
Interest rate cap   194
Total assets measured at fair value on a recurring basis $ 178,337 $ 172,583