v3.26.1
Fair Value Measurements (Carrying Amount, Estimated Fair Value, and Placement in Fair Value Hierarchy of Financial Instruments) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Securities available for sale $ 910,466 $ 922,472
Securities held to maturity, fair value 70,899 76,256
Accrued interest receivable 25,464 25,103
FHLB and FRB stock 23,165 21,632
Carrying Amount [Member] | Level 1 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Cash and cash equivalents 99,174 108,751
Accrued interest receivable 25,464 25,103
Non-maturity deposits 3,627,036 3,519,848
Short-term borrowings 182,000 109,000
Accrued interest payable 18,992 21,436
Carrying Amount [Member] | Level 2 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Securities available for sale 910,466 922,472
Securities held to maturity, fair value 79,300 84,708
Loans held for sale 2,502 3,365
Loans 4,658,661 4,564,939
FHLB and FRB stock 23,165 21,632
Time deposits 1,672,429 1,686,500
Long-term borrowings 78,694 193,653
Carrying Amount [Member] | Level 2 Inputs [Member] | Cash Flow Hedging [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative instruments, assets 1,653 2,188
Carrying Amount [Member] | Level 2 Inputs [Member] | Interest Rate Products [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative instruments, assets 27,404 26,819
Derivative instruments, liabilities 27,402 26,817
Carrying Amount [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative instruments, assets 128 112
Derivative instruments, liabilities 20 13
Carrying Amount [Member] | Level 3 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Loans [1] 46,807 45,541
Long-lived assets held for sale 0 264
Estimated Fair Value [Member] | Level 1 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Cash and cash equivalents 99,174 108,751
Accrued interest receivable 25,464 25,103
Non-maturity deposits 3,627,036 3,519,848
Short-term borrowings 182,000 109,000
Accrued interest payable 18,992 21,436
Estimated Fair Value [Member] | Level 2 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Securities available for sale 910,466 922,472
Securities held to maturity, fair value 70,899 76,256
Loans held for sale 2,502 3,365
Loans 4,446,234 4,492,272
FHLB and FRB stock 23,165 21,632
Time deposits 1,650,190 1,683,492
Long-term borrowings 96,939 227,081
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Cash Flow Hedging [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative instruments, assets 1,653 2,188
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Interest Rate Products [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative instruments, assets 27,404 26,819
Derivative instruments, liabilities 27,402 26,817
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative instruments, assets 128 112
Derivative instruments, liabilities 20 13
Estimated Fair Value [Member] | Level 3 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Loans [1] 46,807 45,541
Long-lived assets held for sale $ 0 $ 264
[1] Comprised of collateral dependent loans.