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Note 7 - Income Taxes (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   

Three months ended

   

Nine months ended

 
   

September 30,

   

September 30,

 

(in thousands)

 

2025

   

2024

   

2025

   

2024

 

Current income tax expense:

                               

Federal

  $ 8,738     $ 7,835     $ 23,776     $ 20,047  

State

    2,024       1,696       5,188       4,552  

Total current income tax expense

    10,762       9,531       28,964       24,599  
                                 

Deferred income tax benefit:

                               

Federal

    (1,078 )     (1,560 )     (1,870 )     (1,830 )

State

    (218 )     (332 )     (356 )     (392 )

Total deferred income tax benefit

    (1,296 )     (1,892 )     (2,226 )     (2,222 )

Change in valuation allowance

    -       -       -       -  

Total income tax expense

  $ 9,466     $ 7,639     $ 26,738     $ 22,377  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   

Three months ended

   

Nine months ended

 
   

September 30,

   

September 30,

 
   

2025

   

2024

   

2025

   

2024

 

U.S. federal statutory income tax rate

    21.00

%

    21.00

%

    21.00 %     21.00 %

State income taxes, net of federal benefit

    3.12       2.91       2.93       3.12  

Excess tax benefit from stock-based compensation arrangements

    (0.09 )     (1.38 )     (0.32 )     (0.36 )

Change in cash surrender value of life insurance

    (0.64 )     (0.79 )     (0.59 )     (0.73 )

Tax Credits

    (2.37 )     (0.52 )     (2.54 )     (0.90 )

Tax exempt interest income

    (0.30 )     (0.42 )     (0.32 )     (0.45 )

Other, net

    (0.01 )     (0.15 )     0.36       (0.41 )

Effective tax rate

    20.71

%

    20.65

%

    20.52 %     21.27 %
Schedule of Unfunded Contributions [Table Text Block]

(dollars in thousands)

 

September 30, 2025

 

Remainder of 2025

  $ 24,095  

2026

    53,724  

2027

    24,627  

2028

    3,173  

2029

    1,479  

Thereafter

    7,387  

Total unfunded contributions

  $ 114,485  
Schedule Of Tax Credits And Other Tax Benefits Recognized And Amortization Expense Related To Tax Credit Partnerships [Table Text Block]
   

Three months ended

   

Nine months ended

 
   

September 30,

   

September 30,

 

(in thousands)

 

2025

   

2024

   

2025

   

2024

 

Proportional amortization method:

                               

Tax credits and other tax benefits recognized

  $ 5,751     $ 2,448     $ 17,160     $ 9,570  

Amortization expense in provision for income taxes

    4,402       1,927       13,295       7,753