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
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Total loans $ 14,478,489   $ 13,696,912      
Less allowance for credit losses (181,853) $ (173,905) (171,683) $ (169,959) $ (165,034) $ (164,458)
Net Loans $ 14,296,636   $ 13,525,229      
Financing receivable, gross percentage 100.00%   100.00%      
Commercial Real Estate Portfolio Segment [Member]            
Total loans $ 3,252,437   $ 3,146,736      
Financing receivable, gross percentage 22.46%   22.97%      
Real Estate Portfolio Segment[Member]            
Total loans $ 9,590,733   $ 9,014,925      
Less allowance for credit losses (88,416) (83,460) (82,543) (68,060) (68,429) (67,726)
Real Estate Portfolio Segment[Member] | Construction Loans [Member]            
Total loans 1,564,504   1,457,628      
Less allowance for credit losses $ (33,427) (27,934) $ (22,432) (46,423) (41,809) (38,597)
Financing receivable, gross percentage 10.81%   10.64%      
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]            
Total loans $ 2,781,375   $ 2,739,823      
Less allowance for credit losses $ (18,011) (18,440) $ (18,833) (20,927) (21,330) (22,302)
Financing receivable, gross percentage 19.21%   20.00%      
Real Estate Portfolio Segment[Member] | One to Four Family [Member]            
Total loans $ 1,685,723   $ 1,671,713      
Less allowance for credit losses $ (24,898) (24,641) $ (24,739) (14,944) (15,246) (14,096)
Financing receivable, gross percentage 11.64%   12.21%      
Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member]            
Total loans $ 5,123,635   $ 4,603,389      
Less allowance for credit losses $ (45,507) (40,379) $ (38,971) (32,189) (31,853) (31,328)
Financing receivable, gross percentage 35.39%   33.61%      
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]            
Total loans     $ 9,014,925      
Financing receivable, gross percentage 66.24%   65.82%      
Consumer Portfolio Segment [Member]            
Total loans $ 70,815   $ 77,623      
Less allowance for credit losses $ (2,765) $ (3,003) $ (3,088) $ (2,454) $ (2,278) $ (2,805)
Financing receivable, gross percentage 0.49%   0.57%