Annual report pursuant to Section 13 and 15(d)

Note 3 - Loans - Summary of Loans (Details)

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Note 3 - Loans - Summary of Loans (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Financing receivable, gross $ 8,465,688 $ 7,261,451    
Less: Allowance for credit losses (87,942) (76,584) $ (68,600) $ (59,406)
Loans and Leases Receivable, Net Amount, Total 8,377,746 7,184,867    
Commercial Real Estate Portfolio Segment [Member]        
Financing receivable, gross 3,295,900 2,696,210    
Less: Allowance for credit losses (36,370) (43,666) (39,016)  
Real Estate Portfolio Segment[Member]        
Financing receivable, gross 4,511,304 3,979,060    
Real Estate Portfolio Segment[Member] | Construction Loans [Member]        
Financing receivable, gross 593,614 521,392    
Less: Allowance for credit losses (16,057) (2,768) (3,522)  
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]        
Financing receivable, gross 1,693,428 1,587,478    
Real Estate Portfolio Segment[Member] | One to Four Family [Member]        
Financing receivable, gross 711,692 644,188    
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]        
Financing receivable, gross 2,106,184 1,747,394    
Consumer Portfolio Segment [Member]        
Financing receivable, gross 64,870 64,789    
Less: Allowance for credit losses $ (1,793) $ (497) $ (554)