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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, 2023 | Dec. 31, 2022
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Securities available for sale |  | $ 854,215 | $ 954,371
Securities held to maturity, fair value |  | 136,540 | 174,188
Accrued interest receivable |  | 23,541 | 19,371
FHLB and FRB stock |  | 15,067 | 19,385
Carrying Amount [Member] | Level 1 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Cash and cash equivalents |  | 192,111 | 130,466
Accrued interest receivable |  | 23,541 | 19,371
Non-maturity deposits |  | 3,806,986 | 3,646,552
Short-term borrowings |  | 70,000 | 205,000
Accrued interest payable |  | 18,138 | 5,983
Carrying Amount [Member] | Level 2 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Securities available for sale |  | 854,215 | 954,371
Securities held to maturity, fair value |  | 154,204 | 188,975
Loans held for sale |  | 1,873 | 550
Loans |  | 4,351,412 | 3,983,582
FHLB and FRB stock |  | 15,067 | 19,385
Time deposits |  | 1,508,987 | 1,282,872
Long-term borrowings |  | 124,454 | 74,222
Carrying Amount [Member] | Level 2 Inputs [Member] | Cash Flow Hedge of Interest Rate Risk [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 8,548 | 6,725
Carrying Amount [Member] | Level 2 Inputs [Member] | Interest Rate Products [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 56,724 | 47,736
Derivative instruments, liabilities |  | 56,725 | 47,738
Carrying Amount [Member] | Level 2 Inputs [Member] | Credit Contract [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, liabilities |  | 0 | 0
Carrying Amount [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 218 | 96
Derivative instruments, liabilities |  | 44 | 13
Carrying Amount [Member] | Level 3 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Loans | [1] | 30,124 | 21,454
Long-lived assets held for sale |  | 1,299 | 1,509
Estimated Fair Value [Member] | Level 1 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Cash and cash equivalents |  | 192,111 | 130,466
Accrued interest receivable |  | 23,541 | 19,371
Non-maturity deposits |  | 3,806,986 | 3,646,552
Short-term borrowings |  | 70,000 | 205,000
Accrued interest payable |  | 18,138 | 5,983
Estimated Fair Value [Member] | Level 2 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Securities available for sale |  | 854,215 | 954,371
Securities held to maturity, fair value |  | 136,540 | 174,188
Loans held for sale |  | 1,873 | 550
Loans |  | 4,150,752 | 3,867,285
FHLB and FRB stock |  | 15,067 | 19,385
Time deposits |  | 1,498,696 | 1,268,957
Long-term borrowings |  | 119,855 | 70,814
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Cash Flow Hedge of Interest Rate Risk [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 8,548 | 6,725
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 |  | 56,724 | 47,736
Derivative instruments, liabilities |  | 56,725 | 47,738
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Credit Contract [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, liabilities |  | 0 | 0
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Derivative instruments, assets |  | 218 | 96
Derivative instruments, liabilities |  | 44 | 13
Estimated Fair Value [Member] | Level 3 Inputs [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Loans | [1] | 30,124 | 21,454
Long-lived assets held for sale |  | $ 1,299 | $ 1,509
[1] | Comprised of collateral dependent loans.

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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Publisher FASB -URI https://asc.fasb.org//310-10/tableOfContent + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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- Details
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- Details
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