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
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
Financing receivable, gross $ 5,628,765   $ 4,911,770      
Less allowance for loan losses (58,459) $ (55,059) (51,893) [1] $ (48,933) $ (46,998) $ (43,419)
Net Loans $ 5,570,306   $ 4,859,877 [1]      
Financing receivable, gross, percentage 100.00%   100.00%      
Commercial Real Estate Portfolio Segment [Member]            
Financing receivable, gross $ 2,223,910   $ 1,982,267      
Less allowance for loan losses $ (31,701) (29,127) $ (28,872) (25,980) (23,655) (21,495)
Financing receivable, gross, percentage 39.51%   40.36%      
Real Estate Portfolio Segment[Member]            
Financing receivable, gross $ 2,879,253   $ 2,539,207      
Financing receivable, gross, percentage 51.15%   51.70%      
Real Estate Portfolio Segment[Member] | Construction Loans [Member]            
Financing receivable, gross $ 467,838   $ 335,085      
Less allowance for loan losses $ (5,331) (5,138) $ (5,125) (4,815) (5,279) (5,432)
Financing receivable, gross, percentage 8.31%   6.82%      
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]            
Financing receivable, gross $ 1,323,383   $ 1,171,719      
Financing receivable, gross, percentage 23.51%   23.86%      
Real Estate Portfolio Segment[Member] | One to Four Family [Member]            
Financing receivable, gross $ 593,180   $ 536,805      
Financing receivable, gross, percentage 10.54%   10.93%      
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]            
Financing receivable, gross $ 962,690   $ 830,683      
Financing receivable, gross, percentage 17.10%   16.91%      
Consumer Portfolio Segment [Member]            
Financing receivable, gross $ 57,764   $ 55,211      
Less allowance for loan losses $ (461) $ (402) $ (392) $ (399) $ (464) $ (431)
Financing receivable, gross, percentage 1.03%   1.12%      
[1] Derived from audited financial statements