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, 2023
Jun. 30, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Pass $ 11,641,130   $ 11,687,968 [1]      
Less: Allowance for credit losses (152,247) $ (152,272) (146,297) [1] $ (140,967) $ (128,387) $ (116,660)
Net Loans $ 11,488,883   $ 11,541,671 [1]      
Financing receivable, gross percentage 100.00%   100.00%      
Commercial Real Estate Portfolio Segment [Member]            
Pass $ 2,890,535   $ 3,145,317      
Financing receivable, gross percentage 24.83%   26.91%      
Real Estate Portfolio Segment[Member]            
Pass $ 7,173,907   $ 6,943,861      
Financing receivable, gross percentage 61.63%   59.41%      
Real Estate Portfolio Segment[Member] | Construction Loans [Member]            
Pass $ 1,509,937   $ 1,532,388      
Less: Allowance for credit losses $ (38,023) (40,443) $ (42,889) (40,016) (35,992) (26,994)
Financing receivable, gross percentage 12.97%   13.11%      
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]            
Pass $ 2,237,684   $ 2,199,280      
Financing receivable, gross percentage 19.22%   18.82%      
Real Estate Portfolio Segment[Member] | One to Four Family [Member]            
Pass $ 1,170,099   $ 1,146,831      
Financing receivable, gross percentage 10.05%   9.81%      
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]            
Pass $ 3,766,124   $ 3,597,750      
Financing receivable, gross percentage 32.36%   30.78%      
Consumer Portfolio Segment [Member]            
Pass $ 66,751   $ 66,402      
Less: Allowance for credit losses $ (1,989) $ (2,127) $ (1,926) $ (2,074) $ (1,992) $ (1,968)
Financing receivable, gross percentage 0.57%   0.57%      
[1] derived from audited financial statements.