Note 5 - Loans and Allowance for Loan Losses - Loans by Credit Quality Indicators (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Loans receivable $ 2,409,047 $ 1,739,214
Commercial Portfolio Segment [Member]    
Loans receivable 1,893,762 1,256,965
Commercial Portfolio Segment [Member] | Pass [Member]    
Loans receivable 1,862,661 1,232,533
Commercial Portfolio Segment [Member] | Special Mention [Member]    
Loans receivable 21,011 19,785
Commercial Portfolio Segment [Member] | Classified [Member]    
Loans receivable 10,093 4,647
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]    
Loans receivable 387,401 246,907
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Pass [Member]    
Loans receivable 378,592 243,228
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Special Mention [Member]    
Loans receivable 7,229 3,571
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Classified [Member]    
Loans receivable 1,580 108
Commercial Portfolio Segment [Member] | CRE - Owner Occupied [Member]    
Loans receivable 367,553 331,222
Commercial Portfolio Segment [Member] | CRE - Owner Occupied [Member] | Pass [Member]    
Loans receivable 356,215 316,706
Commercial Portfolio Segment [Member] | CRE - Owner Occupied [Member] | Special Mention [Member]    
Loans receivable 7,779 11,986
Commercial Portfolio Segment [Member] | CRE - Owner Occupied [Member] | Classified [Member]    
Loans receivable 3,560 2,530
Commercial Portfolio Segment [Member] | CRE - Investor Income Producing [Member]    
Loans receivable 743,107 506,110
Commercial Portfolio Segment [Member] | CRE - Investor Income Producing [Member] | Pass [Member]    
Loans receivable 735,698 500,964
Commercial Portfolio Segment [Member] | CRE - Investor Income Producing [Member] | Special Mention [Member]    
Loans receivable 3,276 3,824
Commercial Portfolio Segment [Member] | CRE - Investor Income Producing [Member] | Classified [Member]    
Loans receivable 4,133 1,322
Commercial Portfolio Segment [Member] | AC&D - 1 - 4 Family Construction [Member]    
Loans receivable 82,707 32,262
Commercial Portfolio Segment [Member] | AC&D - 1 - 4 Family Construction [Member] | Pass [Member]    
Loans receivable 82,708 32,262
Commercial Portfolio Segment [Member] | AC&D - 1 - 4 Family Construction [Member] | Special Mention [Member]    
Loans receivable 0 0
Commercial Portfolio Segment [Member] | AC&D - 1 - 4 Family Construction [Member] | Classified [Member]    
Loans receivable 0 0
Commercial Portfolio Segment [Member] | AC&D - Lots, Land, & Development [Member]    
Loans receivable 105,362 44,411
Commercial Portfolio Segment [Member] | AC&D - Lots, Land, & Development [Member] | Pass [Member]    
Loans receivable 102,147 43,454
Commercial Portfolio Segment [Member] | AC&D - Lots, Land, & Development [Member] | Special Mention [Member]    
Loans receivable 2,727 404
Commercial Portfolio Segment [Member] | AC&D - Lots, Land, & Development [Member] | Classified [Member]    
Loans receivable 489 553
Commercial Portfolio Segment [Member] | AC&D - CRE [Member]    
Loans receivable 194,732 87,452
Commercial Portfolio Segment [Member] | AC&D - CRE [Member] | Pass [Member]    
Loans receivable 194,733 87,452
Commercial Portfolio Segment [Member] | AC&D - CRE [Member] | Special Mention [Member]    
Loans receivable 0 0
Commercial Portfolio Segment [Member] | AC&D - CRE [Member] | Classified [Member]    
Loans receivable 0 0
Commercial Portfolio Segment [Member] | Other Commercial [Member]    
Loans receivable 12,899 8,601
Commercial Portfolio Segment [Member] | Other Commercial [Member] | Pass [Member]    
Loans receivable 12,568 8,467
Commercial Portfolio Segment [Member] | Other Commercial [Member] | Special Mention [Member]    
Loans receivable 0 0
Commercial Portfolio Segment [Member] | Other Commercial [Member] | Classified [Member]    
Loans receivable 331 134
Consumer Portfolio Segment [Member]    
Loans receivable 515,285 482,249
Consumer Portfolio Segment [Member] | Pass [Member]    
Loans receivable 498,594 467,667
Consumer Portfolio Segment [Member] | Special Mention [Member]    
Loans receivable 10,765 11,383
Consumer Portfolio Segment [Member] | Classified [Member]    
Loans receivable 5,929 3,199
Consumer Portfolio Segment [Member] | Residential Mortgage Loans [Member]    
Loans receivable 260,521 223,884
Consumer Portfolio Segment [Member] | Residential Mortgage Loans [Member] | Pass [Member]    
Loans receivable 252,934 217,463
Consumer Portfolio Segment [Member] | Residential Mortgage Loans [Member] | Special Mention [Member]    
Loans receivable 4,707 4,690
Consumer Portfolio Segment [Member] | Residential Mortgage Loans [Member] | Classified [Member]    
Loans receivable 2,880 1,731
Consumer Portfolio Segment [Member] | Home Equity Lines of Credit [Member]    
Loans receivable 176,799 157,378
Consumer Portfolio Segment [Member] | Home Equity Lines of Credit [Member] | Pass [Member]    
Loans receivable 168,461 150,217
Consumer Portfolio Segment [Member] | Home Equity Lines of Credit [Member] | Special Mention [Member]    
Loans receivable 5,732 6,213
Consumer Portfolio Segment [Member] | Home Equity Lines of Credit [Member] | Classified [Member]    
Loans receivable 2,607 948
Consumer Portfolio Segment [Member] | Residential Construction [Member]    
Loans receivable 59,061 72,171
Consumer Portfolio Segment [Member] | Residential Construction [Member] | Pass [Member]    
Loans receivable 58,487 71,225
Consumer Portfolio Segment [Member] | Residential Construction [Member] | Special Mention [Member]    
Loans receivable 312 457
Consumer Portfolio Segment [Member] | Residential Construction [Member] | Classified [Member]    
Loans receivable 262 489
Consumer Portfolio Segment [Member] | Other Loans to Individuals [Member]    
Loans receivable 18,905 28,816
Consumer Portfolio Segment [Member] | Other Loans to Individuals [Member] | Pass [Member]    
Loans receivable 18,712 28,762
Consumer Portfolio Segment [Member] | Other Loans to Individuals [Member] | Special Mention [Member]    
Loans receivable 14 23
Consumer Portfolio Segment [Member] | Other Loans to Individuals [Member] | Classified [Member]    
Loans receivable $ 180 $ 31