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Note 4 - Loans and Allowance for Loan Losses - Nonaccrual Loans, Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Loans in nonaccrual status | $ 39,104 | $ 17,714
Consumer Portfolio Segment [Member] |  |
Loans in nonaccrual status | 2,166 | 654
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] |  |
Loans in nonaccrual status | 373 | 212
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |
Loans in nonaccrual status | 1,793 | 442
Commercial Real Estate Portfolio Segment [Member] |  |
Loans in nonaccrual status | 27,935 | 14,828
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Loans in nonaccrual status | 3,411 | 4,955
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] |  |
Loans in nonaccrual status | 12,139 | 5,453
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] |  |
Loans in nonaccrual status | 12,385 | 4,420
Commercial Portfolio Segment [Member] |  |
Loans in nonaccrual status | 9,003 | 2,232
Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |
Loans in nonaccrual status | 7,765 | 1,968
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |  |
Loans in nonaccrual status | $ 1,238 | $ 264

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