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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 | Jun. 30, 2025 | Dec. 31, 2024
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Securities available for sale |  | $ 916,149 | $ 911,105
Securities held to maturity, fair value |  | 81,555 | 104,556
Accrued interest receivable |  | 24,928 | 23,748
FHLB and FRB stock |  | 20,798 | 18,261
Carrying Amount [Member] | Level 1 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Cash and cash equivalents |  | 93,034 | 87,321
Accrued interest receivable |  | 24,928 | 23,748
Non-maturity deposits |  | 3,543,514 | 3,559,559
Short-term borrowings |  | 101,000 | 99,000
Accrued interest payable |  | 23,687 | 25,856
Carrying Amount [Member] | Level 2 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Securities available for sale |  | 916,149 | 911,105
Securities held to maturity, fair value |  | 92,119 | 116,001
Loans held for sale |  | 2,356 | 2,280
Loans |  | 4,442,125 | 4,374,917
FHLB and FRB stock |  | 20,798 | 18,261
Time deposits |  | 1,612,500 | 1,545,172
Long-term borrowings |  | 114,960 | 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 |  | 3,218 | 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 |  | 28,375 | 41,318
Derivative instruments, liabilities |  | 28,376 | 41,319
Carrying Amount [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 173 | 122
Derivative instruments, liabilities |  | 114 | 91
Carrying Amount [Member] | Level 3 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Loans | [1] | 46,586 | 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 |  | 93,034 | 87,321
Accrued interest receivable |  | 24,928 | 23,748
Non-maturity deposits |  | 3,543,514 | 3,559,559
Short-term borrowings |  | 101,000 | 99,000
Accrued interest payable |  | 23,687 | 25,856
Estimated Fair Value [Member] | Level 2 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Securities available for sale |  | 916,149 | 911,105
Securities held to maturity, fair value |  | 81,555 | 104,556
Loans held for sale |  | 2,356 | 2,280
Loans |  | 4,334,122 | 4,277,167
FHLB and FRB stock |  | 20,798 | 18,261
Time deposits |  | 1,607,647 | 1,541,013
Long-term borrowings |  | 121,187 | 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 |  | 3,218 | 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 |  | 28,375 | 41,318
Derivative instruments, liabilities |  | 28,376 | 41,319
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 173 | 122
Derivative instruments, liabilities |  | 114 | 91
Estimated Fair Value [Member] | Level 3 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Loans | [1] | 46,586 | 56,246
Long-lived assets held for sale |  | $ 528 | $ 596
[1] | Comprised of collateral dependent loans.

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