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, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Total loans $ 13,232,560   $ 12,605,836 [1]      
Less allowance for credit losses (169,959) $ (165,034) (164,458) [1] $ (158,092) $ (155,892) $ (153,317)
Net Loans $ 13,062,601   $ 12,441,378 [1]      
Financing receivable, gross percentage 100.00%   100.00%      
Commercial Real Estate Portfolio Segment [Member]            
Total loans $ 2,966,191   $ 2,869,894      
Financing receivable, gross percentage 22.42%   22.77%      
Real Estate Portfolio Segment[Member]            
Total loans $ 8,457,869   $ 8,173,009      
Less allowance for credit losses (68,060) (68,429) (67,726) (59,684) (57,640) (55,126)
Real Estate Portfolio Segment[Member] | Construction Loans [Member]            
Total loans 1,735,405   1,489,306      
Less allowance for credit losses $ (46,423) (41,809) $ (38,597) (40,450) (45,689) (44,658)
Financing receivable, gross percentage 13.11%   11.81%      
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]            
Total loans $ 2,557,711   $ 2,547,143      
Less allowance for credit losses $ (20,927) (21,330) $ (22,302) (19,039) (18,391) (17,702)
Financing receivable, gross percentage 19.33%   20.21%      
Real Estate Portfolio Segment[Member] | One to Four Family [Member]            
Total loans $ 1,561,461   $ 1,444,623      
Less allowance for credit losses $ (14,944) (15,246) $ (14,096) (13,629) (12,994) (12,029)
Financing receivable, gross percentage 11.80%   11.46%      
Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member]            
Total loans $ 4,338,697   $ 4,181,243      
Less allowance for credit losses $ (32,189) (31,853) $ (31,328) (27,016) (26,255) (25,395)
Financing receivable, gross percentage 32.79%   33.17%      
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]            
Total loans     $ 8,173,009      
Financing receivable, gross percentage 63.92%   64.84%      
Consumer Portfolio Segment [Member]            
Total loans $ 73,095   $ 73,627      
Less allowance for credit losses $ (2,454) $ (2,278) $ (2,805) $ (1,742) $ (1,541) $ (1,412)
Financing receivable, gross percentage 0.55%   0.58%      
[1] Derived from audited financial statements.