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Fair Value Measurements (Carrying Amount, Estimated Fair Value, and Placement in Fair Value Hierarchy of Financial Instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Securities available for sale $ 923,592 $ 911,105
Securities held to maturity, fair value 78,477 104,556
Accrued interest receivable 25,738 23,748
FHLB and FRB stock 18,956 18,261
Carrying Amount [Member] | Level 1 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Cash and cash equivalents 185,945 87,321
Accrued interest receivable 25,738 23,748
Non-maturity deposits 3,691,681 3,559,559
Short-term borrowings 55,000 99,000
Accrued interest payable 19,757 25,856
Carrying Amount [Member] | Level 2 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Securities available for sale 923,592 911,105
Securities held to maturity, fair value 87,627 116,001
Loans held for sale 2,252 2,280
Loans 4,495,138 4,374,917
FHLB and FRB stock 18,956 18,261
Time deposits 1,666,128 1,545,172
Long-term borrowings 115,000 124,842
Carrying Amount [Member] | Level 2 Inputs [Member] | Cash Flow Hedging [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative instruments, assets 2,738 4,693
Derivative instruments, liabilities 0 0
Carrying Amount [Member] | Level 2 Inputs [Member] | Interest Rate Products [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative instruments, assets 27,579 41,319
Derivative instruments, liabilities 27,577 41,318
Carrying Amount [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative instruments, assets 135 122
Derivative instruments, liabilities 23 91
Carrying Amount [Member] | Level 3 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Loans [1] 47,993 56,246
Long-lived assets held for sale 528 596
Estimated Fair Value [Member] | Level 1 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Cash and cash equivalents 185,945 87,321
Accrued interest receivable 25,738 23,748
Non-maturity deposits 3,691,681 3,559,559
Short-term borrowings 55,000 99,000
Accrued interest payable 19,757 25,856
Estimated Fair Value [Member] | Level 2 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Securities available for sale 923,592 911,105
Securities held to maturity, fair value 78,477 104,556
Loans held for sale 2,252 2,280
Loans 4,399,650 4,277,167
FHLB and FRB stock 18,956 18,261
Time deposits 1,662,780 1,541,013
Long-term borrowings 121,496 127,402
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 2,738 4,693
Derivative instruments, liabilities 0 0
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 27,579 41,319
Derivative instruments, liabilities 27,577 41,318
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Derivative instruments, assets 135 122
Derivative instruments, liabilities 23 91
Estimated Fair Value [Member] | Level 3 Inputs [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Loans [1] 47,993 56,246
Long-lived assets held for sale $ 528 $ 596
[1] Comprised of collateral dependent loans.