Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Loans - Summary of Loans (Details)

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Note 5 - Loans - Summary of Loans (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Financing receivable, gross $ 5,343,688   $ 4,911,770      
Less allowance for loan losses (55,059) $ (53,892) (51,893) [1] $ (46,998) $ (45,145) $ (43,419)
Net Loans $ 5,288,629   $ 4,859,877 [1]      
Financing receivable, gross, percentage 100.00%   100.00%      
Commercial Real Estate Portfolio Segment [Member]            
Financing receivable, gross $ 2,123,498   $ 1,982,267      
Less allowance for loan losses $ (29,127) (28,707) $ (28,872) (23,655) (22,839) (21,495)
Financing receivable, gross, percentage 39.74%   40.36%      
Real Estate Portfolio Segment[Member]            
Financing receivable, gross $ 2,769,568   $ 2,539,207      
Financing receivable, gross, percentage 51.83%   51.70%      
Real Estate Portfolio Segment[Member] | Construction Loans [Member]            
Financing receivable, gross $ 395,398   $ 335,085      
Less allowance for loan losses $ (5,138) (4,825) $ (5,125) (5,279) (5,005) (5,432)
Financing receivable, gross, percentage 7.40%   6.82%      
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]            
Financing receivable, gross $ 1,272,659   $ 1,171,719      
Financing receivable, gross, percentage 23.82%   23.86%      
Real Estate Portfolio Segment[Member] | One to Four Family [Member]            
Financing receivable, gross $ 565,121   $ 536,805      
Financing receivable, gross, percentage 10.57%   10.93%      
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]            
Financing receivable, gross $ 931,788   $ 830,683      
Financing receivable, gross, percentage 17.44%   16.91%      
Consumer Portfolio Segment [Member]            
Financing receivable, gross $ 55,224   $ 55,211      
Less allowance for loan losses $ (402) $ (398) $ (392) $ (464) $ (400) $ (431)
Financing receivable, gross, percentage 1.03%   1.12%      
[1] Derived from audited financial statements