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Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Originated loans $ 1,529,502 $ 1,523,284
Total 1,816,319 1,827,744
Commercial Portfolio Segment [Member] | Purchased Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans   20,066
Commercial Portfolio Segment [Member] | Credit Risk Discount [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans   (1,530)
Purchased non-covered loans (2,134) (726)
Commercial Portfolio Segment [Member] | Gross Purchased Non-Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased non-covered loans 25,643 7,525
Commercial Portfolio Segment [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Originated loans 360,151 338,824
Total 383,660 364,159
Commercial Real Estate Portfolio Segment [Member] | Purchased Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans   175,562
Commercial Real Estate Portfolio Segment [Member] | Credit Risk Discount [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans   (8,122)
Purchased non-covered loans (7,892) (786)
Commercial Real Estate Portfolio Segment [Member] | Gross Purchased Non-Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased non-covered loans 200,358 35,712
Commercial Real Estate Portfolio Segment [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Originated loans 595,210 596,653
Total 787,676 799,019
Construction Portfolio Segment [Member] | Purchased Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans   3,223
Construction Portfolio Segment [Member] | Credit Risk Discount [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans   (50)
Purchased non-covered loans (50)  
Construction Portfolio Segment [Member] | Gross Purchased Non-Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased non-covered loans 3,199  
Construction Portfolio Segment [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Originated loans 9,837 10,723
Total 12,986 13,896
Residential Portfolio Segment [Member] | Purchased Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans 4,856 8,558
Residential Portfolio Segment [Member] | Credit Risk Discount [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans (434) (434)
Purchased non-covered loans (262) (262)
Residential Portfolio Segment [Member] | Gross Purchased Non-Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased non-covered loans 991 999
Residential Portfolio Segment [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Originated loans 170,176 176,196
Total 175,327 185,057
Consumer Portfolio Segment [Member] | Purchased Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans 14,756 54,194
Consumer Portfolio Segment [Member] | Credit Risk Discount [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans (209) (797)
Purchased non-covered loans (1,802) (1,471)
Consumer Portfolio Segment [Member] | Gross Purchased Non-Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased non-covered loans 49,797 12,799
Consumer Portfolio Segment [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Originated loans 394,128 400,888
Total 456,670 465,613
Purchased Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans 19,612 261,603
Credit Risk Discount [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased covered loans (643) (10,933)
Purchased non-covered loans (12,140) (3,245)
Gross Purchased Non-Covered Loans [Member]
    
Note 4 - Loans and Allowance for Credit Losses (Details) - Loans Receivable at Carrying Amount [Line Items]    
Purchased non-covered loans $ 279,988 $ 57,035