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Note 18 - Intangible Assets and Goodwill (Details) - Goodwill and Intangible Assets - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Note 18 - Intangible Assets and Goodwill (Details) - Goodwill and Intangible Assets [Line Items]    
Amortizable core deposit intangibles $ 22,105 $ 22,105
Amortizable core deposit intangibles 15,881 14,882
Amortizable core deposit intangibles 6,224 7,223
December 31, 2014    
Unamortizable goodwill 5,848 5,848
Unamortizable goodwill 5,848 5,848
Core Deposits [Member]    
Note 18 - Intangible Assets and Goodwill (Details) - Goodwill and Intangible Assets [Line Items]    
Amortizable core deposit intangibles 16,257 16,257
Amortizable core deposit intangibles 15,881 14,882
Amortizable core deposit intangibles $ 376 $ 1,375