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
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Financing receivable, gross $ 5,928,327 $ 5,851,261    
Less allowance for loan losses (62,050) (59,406) [1] $ (53,892) $ (51,893)
Net Loans $ 5,866,277 $ 5,791,855 [1]    
Financing receivable, gross, percentage 100.00% 100.00%    
Commercial Real Estate Portfolio Segment [Member]        
Financing receivable, gross $ 2,329,904 $ 2,279,366    
Less allowance for loan losses $ (35,787) $ (32,880) (28,707) (28,872)
Financing receivable, gross, percentage 39.30% 38.96%    
Real Estate Portfolio Segment[Member]        
Financing receivable, gross $ 3,030,659 $ 2,928,808    
Financing receivable, gross, percentage 51.12% 50.05%    
Real Estate Portfolio Segment[Member] | Construction Loans [Member]        
Financing receivable, gross $ 506,050 $ 580,874    
Less allowance for loan losses $ (4,138) $ (4,989) (4,825) (5,125)
Financing receivable, gross, percentage 8.54% 9.93%    
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]        
Financing receivable, gross $ 1,349,679 $ 1,328,666    
Financing receivable, gross, percentage 22.77% 22.71%    
Real Estate Portfolio Segment[Member] | One to Four Family [Member]        
Financing receivable, gross $ 581,498 $ 603,063    
Financing receivable, gross, percentage 9.81% 10.30%    
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]        
Financing receivable, gross $ 1,099,482 $ 997,079    
Financing receivable, gross, percentage 18.54% 17.04%    
Consumer Portfolio Segment [Member]        
Financing receivable, gross $ 61,714 $ 62,213    
Less allowance for loan losses $ (519) $ (515) $ (398) $ (392)
Financing receivable, gross, percentage 1.04% 1.06%    
[1] derived from audited financial statements