Annual report pursuant to Section 13 and 15(d)

Note 3 - Loans - Summary of Collateral Types (Details)

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Note 3 - Loans - Summary of Collateral Types (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Financing receivable, gross $ 11,687,968 $ 9,532,934  
Allowance for credit losses 146,297 116,660 $ 87,942
Commercial Real Estate Portfolio Segment [Member]      
Financing receivable, gross 3,145,317 2,984,053  
Allowance for credit losses 42,830 41,869 36,370
Real Estate Portfolio Segment[Member]      
Financing receivable, gross 6,943,861 5,378,952  
Real Estate Portfolio Segment[Member] | Construction Loans [Member]      
Financing receivable, gross 1,532,388 1,103,076  
Allowance for credit losses 42,889 26,994 $ 16,057
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]      
Financing receivable, gross 2,199,280 1,874,103  
Real Estate Portfolio Segment[Member] | One to Four Family [Member]      
Financing receivable, gross 1,146,831 826,765  
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]      
Financing receivable, gross 3,597,750 2,678,084  
Real Estate [Member]      
Financing receivable, gross 44,205 33,258  
Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing receivable, gross 20,061 13,067  
Real Estate [Member] | Real Estate Portfolio Segment[Member]      
Financing receivable, gross 24,144 20,191  
Real Estate [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member]      
Financing receivable, gross 0    
Real Estate [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]      
Financing receivable, gross 8,573 4,372  
Real Estate [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member]      
Financing receivable, gross 3,260 2,982  
Real Estate [Member] | Real Estate Portfolio Segment[Member] | Other Mortgages [Member]      
Financing receivable, gross 12,311 12,837  
Collateral, Accounts Receivable [Member]      
Financing receivable, gross 12,092 5,075  
Collateral, Accounts Receivable [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing receivable, gross 12,092 5,075  
Collateral, Accounts Receivable [Member] | Real Estate Portfolio Segment[Member]      
Financing receivable, gross 0 0  
Collateral, Accounts Receivable [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member]      
Financing receivable, gross 0    
Collateral, Accounts Receivable [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]      
Financing receivable, gross 0 0  
Collateral, Accounts Receivable [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member]      
Financing receivable, gross 0 0  
Collateral, Accounts Receivable [Member] | Real Estate Portfolio Segment[Member] | Other Mortgages [Member]      
Financing receivable, gross 0 0  
Equipment [Member]      
Financing receivable, gross 837 18,533  
Equipment [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing receivable, gross 837 18,533  
Equipment [Member] | Real Estate Portfolio Segment[Member]      
Financing receivable, gross 0 0  
Equipment [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member]      
Financing receivable, gross 0    
Equipment [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]      
Financing receivable, gross 0 0  
Equipment [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member]      
Financing receivable, gross 0 0  
Equipment [Member] | Real Estate Portfolio Segment[Member] | Other Mortgages [Member]      
Financing receivable, gross 0 0  
Collateral, Other [Member]      
Financing receivable, gross 26,270 27,599  
Collateral, Other [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing receivable, gross 24,998 27,599  
Collateral, Other [Member] | Real Estate Portfolio Segment[Member]      
Financing receivable, gross 74 0  
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member]      
Financing receivable, gross 1,198    
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]      
Financing receivable, gross 74 0  
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member]      
Financing receivable, gross 0 0  
Collateral, Other [Member] | Real Estate Portfolio Segment[Member] | Other Mortgages [Member]      
Financing receivable, gross 0 0  
Collateral Pledged [Member]      
Financing receivable, gross 83,404 84,465  
Allowance for credit losses 10,387 11,292  
Collateral Pledged [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing receivable, gross 57,988 64,274  
Allowance for credit losses 9,910 9,727  
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member]      
Financing receivable, gross 24,218 20,191  
Allowance for credit losses 470 1,565  
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | Construction Loans [Member]      
Financing receivable, gross 1,198    
Allowance for credit losses 7    
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]      
Financing receivable, gross 8,647 4,372  
Allowance for credit losses 154 1,371  
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | One to Four Family [Member]      
Financing receivable, gross 3,260 2,982  
Allowance for credit losses 316 163  
Collateral Pledged [Member] | Real Estate Portfolio Segment[Member] | Other Mortgages [Member]      
Financing receivable, gross 12,311 12,837  
Allowance for credit losses $ 0 $ 31