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Note 7 - Core Deposit Intangible Assets, Net (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
2017
  $
2,357,000
 
2018
   
2,039,000
 
2019
   
1,721,000
 
2020
   
1,403,000
 
2021
   
1,086,000
 
Thereafter
   
1,351,000