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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, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Securities available for sale |  | $ 871,635 | $ 887,730
Securities held to maturity, fair value |  | 115,849 | 137,030
Accrued interest receivable |  | 24,494 | 24,481
FHLB and FRB stock |  | 19,085 | 17,406
Carrying Amount [Member] | Level 1 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Cash and cash equivalents |  | 146,347 | 124,442
Accrued interest receivable |  | 24,494 | 24,481
Non-maturity deposits |  | 3,658,182 | 3,808,216
Short-term borrowings |  | 202,000 | 185,000
Accrued interest payable |  | 27,444 | 19,412
Carrying Amount [Member] | Level 2 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Securities available for sale |  | 871,635 | 887,730
Securities held to maturity, fair value |  | 128,271 | 148,156
Loans held for sale |  | 2,099 | 1,370
Loans |  | 4,387,562 | 4,373,541
FHLB and FRB stock |  | 19,085 | 17,406
Time deposits |  | 1,475,139 | 1,404,696
Long-term borrowings |  | 124,687 | 124,532
Carrying Amount [Member] | Level 2 Inputs [Member] | Cash Flow Hedging [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 6,560 | 5,939
Carrying Amount [Member] | Level 2 Inputs [Member] | Interest Rate Products [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 45,274 | 37,517
Derivative instruments, liabilities |  | 45,275 | 37,519
Carrying Amount [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 154 | 50
Derivative instruments, liabilities |  | 9 | 2
Carrying Amount [Member] | Level 3 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Loans | [1] | 29,954 | 37,516
Long-lived assets held for sale |  | 629 | 629
Estimated Fair Value [Member] | Level 1 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Cash and cash equivalents |  | 146,347 | 124,442
Accrued interest receivable |  | 24,494 | 24,481
Non-maturity deposits |  | 3,658,182 | 3,808,216
Short-term borrowings |  | 202,000 | 185,000
Accrued interest payable |  | 27,444 | 19,412
Estimated Fair Value [Member] | Level 2 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Securities available for sale |  | 871,635 | 887,730
Securities held to maturity, fair value |  | 115,849 | 137,030
Loans held for sale |  | 2,099 | 1,370
Loans |  | 4,186,818 | 4,143,918
FHLB and FRB stock |  | 19,085 | 17,406
Time deposits |  | 1,467,809 | 1,398,352
Long-term borrowings |  | 126,764 | 128,363
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 |  | 6,560 | 5,939
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 |  | 45,274 | 37,517
Derivative instruments, liabilities |  | 45,275 | 37,519
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 154 | 50
Derivative instruments, liabilities |  | 9 | 2
Estimated Fair Value [Member] | Level 3 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Loans | [1] | 29,954 | 37,516
Long-lived assets held for sale |  | $ 629 | $ 629
[1] | Comprised of collateral dependent loans.

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