Note 18 - Income Taxes - Components of Net Deferred Tax Asset (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:    
Loan and lease loss reserve $ 6,492 $ 5,872
Other reserves 3,611 5,509
Net operating loss carry-forward 471 927
Alternative minimum tax credits 567 567
Unrealized depreciation of available for sale securities 663
Defined benefit plans 2,068 1,851
Total deferred tax asset 13,872 14,726
Deferred tax liabilities:    
Other reserves 52 461
Originated MSRs 1,969 1,800
Amortizing fair value adjustments 1,336 911
Unrealized appreciation of available for sale securities 417
Total deferred tax liability 3,357 3,589
Total net deferred tax asset $ 10,515 $ 11,137