v3.26.1
Industry Segment Information (Details)
 3 Months Ended 6 Months Ended 9 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Interest Income (Expense), after Provision for Loan Loss [Abstract]            
Fee revenue and other income $ 28,927,000 $ 24,948,000 $ 56,873,000 $ 52,986,000    
Gain (Loss) on Sale of Investments 5,000 (3,558,000) 10,000 (3,576,000)    
Interest income 25,605,000 23,639,000 50,709,000 47,028,000    
Interest Expense, Operating 4,058,000 4,164,000 7,946,000 8,280,000    
Interest expense     7,946,000 8,280,000    
Intersegment expense (income) 21,547,000 19,475,000 42,763,000 38,748,000    
Tax-equivalized pre-tax income 13,174,000 6,279,000 24,057,000 17,155,000    
Income (Loss) from Discontinued Operations Including Tax Equivalent Adjustment, Before Income Taxes, Noncontrolling Interest 16,000   140,000      
Goodwill 16,164,000 16,164,000 16,164,000 16,164,000   $ 16,164,000
Other intangible assets, net 3,142,000 4,329,000 3,142,000 4,329,000    
Total assets 2,516,212,000 2,316,018,000 2,516,212,000 2,316,018,000   $ 2,606,024,000
Average funding sources 2,243,101,000 2,106,172,000 2,234,947,000 2,105,793,000    
Provision for credit losses 531,000 25,000 592,000 930,000    
Total net revenue 49,943,000 44,398,000 99,044,000 90,804,000    
Total personnel expenses 27,085,000 27,752,000 54,364,000 55,031,000    
Occupancy 703,000 669,000 1,384,000 1,390,000    
Equipment 2,776,000 2,562,000 5,208,000 4,856,000    
Bad debt expense (1,759,000) 0 (1,759,000) (2,000,000)    
Other Cost and Expense, Operating 7,964,000 7,136,000 15,790,000 14,372,000    
Operating Expenses 36,769,000 38,119,000 74,987,000 73,649,000    
Available-for-sale securities, gross realized gains 125,000 0 187,000 0    
Available-for-sale securities, gross realized losses 120,000 3,600,000 177,000 3,600,000    
Share-based compensation expense $ 1,130,000 918,000 2,569,000 2,159,000    
Number of Reportable Segments 2          
Supplemental Employee Retirement Plan            
Interest Income (Expense), after Provision for Loan Loss [Abstract]            
Net periodic cost (benefit) $ 108,000 112,000 216,000 225,000 $ 450,000  
Corporate, Eliminations and Other            
Interest Income (Expense), after Provision for Loan Loss [Abstract]            
Fee revenue and other income 508,000 463,000 985,000 905,000    
Gain (Loss) on Sale of Investments 5,000 (3,558,000) 10,000 (3,576,000)    
Interest income (4,182,000) (3,948,000) (7,823,000) (7,328,000)    
Interest Expense, Operating (2,756,000) (4,125,000)        
Interest expense     (5,235,000) (7,986,000)    
Intersegment expense (income) 0 0 0 0    
Tax-equivalized pre-tax income (913,000) (2,918,000) (1,593,000) (2,013,000)    
Income (Loss) from Discontinued Operations Including Tax Equivalent Adjustment, Before Income Taxes, Noncontrolling Interest 0 0 0 0    
Goodwill 0 0 0 0    
Other intangible assets, net 0 0 0 0    
Total assets (327,140,000) (306,352,000) (327,140,000) (306,352,000)    
Average funding sources 0 0 0 0    
Provision for credit losses 0 0 0 0    
Total net revenue (913,000) (2,918,000) (1,593,000) (2,013,000)    
Total personnel expenses 0 0 0 0    
Occupancy 0 0 0 0    
Equipment 0 0 0 0    
Bad debt expense 0   0 0    
Other Cost and Expense, Operating 0 0 0 0    
Operating Expenses 0 0 0 0    
Information services payment and processing revenue | Operating Segments            
Interest Income (Expense), after Provision for Loan Loss [Abstract]            
Fee revenue and other income 27,631,000 27,348,000 54,371,000 54,354,000    
Loss on Sale of Investments 0 0 0 0    
Interest income 13,085,000 10,888,000 25,816,000 21,453,000    
Interest Expense, Operating 216,000 258,000        
Interest expense     450,000 525,000    
Intersegment expense (income) 791,000 899,000 1,661,000 1,772,000    
Tax-equivalized pre-tax income 8,249,000 3,764,000 14,077,000 10,254,000    
Income (Loss) from Discontinued Operations Including Tax Equivalent Adjustment, Before Income Taxes, Noncontrolling Interest 16,000 4,927,000 140,000 5,456,000    
Goodwill 16,028,000 16,028,000 16,028,000 16,028,000    
Other intangible assets, net 3,142,000 4,329,000 3,142,000 4,329,000    
Total assets 1,645,961,000 1,438,612,000 1,645,961,000 1,438,612,000    
Average funding sources 1,452,058,000 1,339,550,000 1,440,696,000 1,338,846,000    
Provision for credit losses 0 0 0 0    
Total net revenue 40,500,000 37,978,000 79,737,000 75,282,000    
Total personnel expenses 24,038,000 24,792,000 48,137,000 48,913,000    
Occupancy 509,000 500,000 1,028,000 1,027,000    
Equipment 2,491,000 2,495,000 4,646,000 4,722,000    
Bad debt expense (1,759,000)   (1,759,000) (2,000,000)    
Other Cost and Expense, Operating 6,181,000 5,528,000 11,947,000 10,594,000    
Operating Expenses 32,251,000 34,214,000 65,660,000 65,028,000    
Banking Services | Operating Segments            
Interest Income (Expense), after Provision for Loan Loss [Abstract]            
Fee revenue and other income 783,000 695,000 1,507,000 1,303,000    
Loss on Sale of Investments 0 0 0 0    
Interest income 16,702,000 16,699,000 32,716,000 32,903,000    
Interest Expense, Operating 6,598,000 8,031,000        
Interest expense     12,731,000 15,741,000    
Intersegment expense (income) (791,000) (899,000) (1,661,000) (1,772,000)    
Tax-equivalized pre-tax income 5,838,000 5,433,000 11,573,000 8,914,000    
Income (Loss) from Discontinued Operations Including Tax Equivalent Adjustment, Before Income Taxes, Noncontrolling Interest 0 0 0 0    
Goodwill 136,000 136,000 136,000 136,000    
Other intangible assets, net 0 0 0 0    
Total assets 1,197,391,000 1,183,758,000 1,197,391,000 1,183,758,000    
Average funding sources 791,043,000 766,622,000 794,251,000 766,947,000    
Provision for credit losses 531,000 25,000 592,000 930,000    
Total net revenue 10,356,000 9,338,000 20,900,000 17,535,000    
Total personnel expenses 3,047,000 2,960,000 6,227,000 6,118,000    
Occupancy 194,000 169,000 356,000 363,000    
Equipment 285,000 67,000 562,000 134,000    
Bad debt expense 0   0 0    
Other Cost and Expense, Operating 1,783,000 1,608,000 3,843,000 3,778,000    
Operating Expenses $ 4,518,000 $ 3,905,000 $ 9,327,000 $ 8,621,000