Quarterly report [Sections 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, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Total loans $ 13,945,913 $ 13,696,912 [1]    
Less allowance for credit losses (173,905) (171,683) [1] $ (165,034) $ (164,458)
Net Loans $ 13,772,008 $ 13,525,229 [1]    
Financing receivable, gross percentage 100.00% 100.00%    
Commercial Real Estate Portfolio Segment [Member]        
Total loans $ 3,189,704 $ 3,146,736    
Financing receivable, gross percentage 22.87% 22.97%    
Real Estate Portfolio Segment[Member]        
Total loans $ 9,153,294 $ 9,014,925    
Less allowance for credit losses (83,460) (82,543) (68,429) (67,726)
Real Estate Portfolio Segment[Member] | Construction Loans [Member]        
Total loans 1,531,042 1,457,628    
Less allowance for credit losses $ (27,934) $ (22,432) (41,809) (38,597)
Financing receivable, gross percentage 10.98% 10.64%    
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]        
Total loans $ 2,718,512 $ 2,739,823    
Less allowance for credit losses $ (18,440) $ (18,833) (21,330) (22,302)
Financing receivable, gross percentage 19.49% 20.00%    
Real Estate Portfolio Segment[Member] | One to Four Family [Member]        
Total loans $ 1,695,140 $ 1,671,713    
Less allowance for credit losses $ (24,641) $ (24,739) (15,246) (14,096)
Financing receivable, gross percentage 12.16% 12.21%    
Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member]        
Total loans $ 4,739,642 $ 4,603,389    
Less allowance for credit losses $ (40,379) $ (38,971) (31,853) (31,328)
Financing receivable, gross percentage 33.98% 33.61%    
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]        
Total loans   $ 9,014,925    
Financing receivable, gross percentage 65.63% 65.82%    
Consumer Portfolio Segment [Member]        
Total loans $ 71,873 $ 77,623    
Less allowance for credit losses $ (3,003) $ (3,088) $ (2,278) $ (2,805)
Financing receivable, gross percentage 0.52% 0.57%    
[1] Derived from audited financial statements.