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Allowance For Credit Losses (Composition Of The Allowance For Loan Losses) (Details) - USD ($) | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | $ 774,000 |  | $ 1,299,000 |  |  |
Allowance for loan losses collectively evaluated for impairment |  | 89,011,000 |  | 86,667,000 |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net |  | 0 |  | 0 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 89,785,000 | $ 88,130,000 | 87,966,000 | $ 86,575,000 | $ 85,084,000 | $ 83,745,000
Loans collectively evaluated for impairment |  | 7,900,651,000 |  | 7,746,515,000 |  |  |
Accruing loans acquired with deteriorated credit quality- Loan Balance |  | $ 2,004,000 |  | $ 2,174,000 |  |  |
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment |  | 1.13% |  | 1.12% |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance |  | 0.00% |  | 0.00% |  |  |
Total ending allowance for loan losses balance as a percentage of loan balance |  | 1.13% |  | 1.13% |  |  |
Loan balance |  | $ 7,963,221,000 |  | $ 7,817,128,000 |  |  |
Accruing loans acquired with deteriorated credit quality |  | 0 |  | 0 |  |  |
special purpose mortgage loan program |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Loan balance |  | 207,900,000 |  |  |  |  |
Nonperforming Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | 774,000 |  | 1,299,000 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 1,949,000 |  | 2,370,000 |  |  |
Loans individually evaluated for impairment |  | $ 46,547,000 |  | $ 53,149,000 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 1.66% |  | 2.44% |  |  |
Performing Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Loans individually evaluated for impairment |  | $ 14,019,000 |  | $ 15,290,000 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.00% |  |  |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  | $ 10,411,000 |  | $ 11,424,000 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 11,103,000 | 11,408,000 | 12,683,000 | 16,663,000 | 14,971,000 | 15,496,000
Loans collectively evaluated for impairment |  | 1,177,683,000 |  | 1,230,101,000 |  |  |
Accruing loans acquired with deteriorated credit quality- Loan Balance |  | $ 0 |  | $ 0 |  |  |
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment |  | 0.88% |  | 0.93% |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance |  | 0.00% |  | 0.00% |  |  |
Total ending allowance for loan losses balance as a percentage of loan balance |  | 0.91% |  | 1.00% |  |  |
Loan balance |  | $ 1,214,230,000 |  | $ 1,269,585,000 |  |  |
Accruing loans acquired with deteriorated credit quality |  | 0 |  | 0 |  |  |
Commercial Financial And Agricultural [Member] | Nonperforming Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | 692,000 |  | 1,259,000 |  |  |
Loans individually evaluated for impairment |  | $ 22,528,000 |  | $ 24,194,000 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 3.07% |  | 5.20% |  |  |
Commercial Financial And Agricultural [Member] | Performing Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Loans individually evaluated for impairment |  | $ 14,019,000 |  | $ 15,290,000 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.00% |  |  |
Commercial Real Estate [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  | $ 20,417,000 |  | $ 19,571,000 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 20,499,000 | 19,838,000 | 19,571,000 | 16,855,000 | 17,181,000 | 16,374,000
Loans collectively evaluated for impairment |  | 2,082,834,000 |  | 1,969,785,000 |  |  |
Accruing loans acquired with deteriorated credit quality- Loan Balance |  | $ 1,319,000 |  | $ 1,317,000 |  |  |
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment |  | 0.98% |  | 0.99% |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance |  | 0.00% |  | 0.00% |  |  |
Total ending allowance for loan losses balance as a percentage of loan balance |  | 0.97% |  | 0.98% |  |  |
Loan balance | [1] | $ 2,106,687,000 |  | $ 1,994,332,000 |  |  |
Accruing loans acquired with deteriorated credit quality |  | 0 |  | 0 |  |  |
Commercial Real Estate [Member] | Nonperforming Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | 82,000 |  | 0 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 82,000 |  | 0 |  |  |
Loans individually evaluated for impairment |  | $ 22,534,000 |  | $ 23,230,000 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.36% |  | 0.00% |  |  |
Commercial Real Estate [Member] | Performing Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Loans individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.00% |  |  |
Construction Real Estate [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  | $ 7,765,000 |  | $ 7,125,000 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 7,765,000 | 8,139,000 | 7,125,000 | 5,867,000 | 5,742,000 | 5,227,000
Loans collectively evaluated for impairment |  | 429,914,000 |  | 411,988,000 |  |  |
Accruing loans acquired with deteriorated credit quality- Loan Balance |  | $ 557,000 |  | $ 581,000 |  |  |
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment |  | 1.81% |  | 1.73% |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance |  | 0.00% |  | 0.00% |  |  |
Total ending allowance for loan losses balance as a percentage of loan balance |  | 1.80% |  | 1.73% |  |  |
Loan balance |  | $ 430,590,000 |  | $ 412,577,000 |  |  |
Accruing loans acquired with deteriorated credit quality |  | 0 |  | 0 |  |  |
Construction Real Estate [Member] | Nonperforming Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | 0 |  | 0 |  |  |
Loans individually evaluated for impairment |  | $ 119,000 |  | $ 8,000 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.00% |  |  |
Construction Real Estate [Member] | Performing Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Loans individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.00% |  |  |
Residential Real Estate [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  | $ 24,510,000 |  | $ 22,315,000 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 24,510,000 | 22,749,000 | 22,355,000 | 19,450,000 | 19,633,000 | 18,818,000
Loans collectively evaluated for impairment |  | 2,310,437,000 |  | 2,194,457,000 |  |  |
Accruing loans acquired with deteriorated credit quality- Loan Balance |  | $ 128,000 |  | $ 276,000 |  |  |
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment |  | 1.06% |  | 1.02% |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance |  | 0.00% |  | 0.00% |  |  |
Total ending allowance for loan losses balance as a percentage of loan balance |  | 1.06% |  | 1.02% |  |  |
Loan balance |  | $ 2,311,928,000 |  | $ 2,200,433,000 |  |  |
Accruing loans acquired with deteriorated credit quality |  | 0 |  | 0 |  |  |
Residential Real Estate [Member] | Nonperforming Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | 0 |  | 40,000 |  |  |
Loans individually evaluated for impairment |  | $ 1,363,000 |  | $ 5,700,000 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.70% |  |  |
Residential Real Estate [Member] | Performing Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Loans individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.00% |  |  |
Consumer [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  | $ 25,716,000 |  | $ 26,081,000 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 25,716,000 | 25,815,000 | 26,081,000 | 27,579,000 | 27,394,000 | 27,713,000
Loans collectively evaluated for impairment |  | 1,870,856,000 |  | 1,910,372,000 |  |  |
Accruing loans acquired with deteriorated credit quality- Loan Balance |  | $ 0 |  | $ 0 |  |  |
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment |  | 1.37% |  | 1.37% |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance |  | 0.00% |  | 0.00% |  |  |
Total ending allowance for loan losses balance as a percentage of loan balance |  | 1.37% |  | 1.37% |  |  |
Loan balance |  | $ 1,870,856,000 |  | $ 1,910,372,000 |  |  |
Accruing loans acquired with deteriorated credit quality |  | 0 |  | 0 |  |  |
Consumer [Member] | Nonperforming Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | 0 |  | 0 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 919,000 |  | 786,000 |  |  |
Loans individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.00% |  |  |
Consumer [Member] | Performing Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Loans individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.00% |  |  |
Finance Leases Portfolio Segment [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  | $ 192,000 |  | $ 151,000 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 192,000 | $ 181,000 | 151,000 | $ 161,000 | $ 163,000 | $ 117,000
Loans collectively evaluated for impairment |  | 28,927,000 |  | 29,812,000 |  |  |
Accruing loans acquired with deteriorated credit quality- Loan Balance |  | $ 0 |  | $ 0 |  |  |
Allowance for loan losses as a percentage of loan balance collectively evaluated for impairment |  | 0.66% |  | 0.51% |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance |  | 0.00% |  | 0.00% |  |  |
Total ending allowance for loan losses balance as a percentage of loan balance |  | 0.66% |  | 0.51% |  |  |
Loan balance |  | $ 28,930,000 |  | $ 29,829,000 |  |  |
Accruing loans acquired with deteriorated credit quality |  | 0 |  | 0 |  |  |
Finance Leases Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | 0 |  | 0 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 0 |  | 0 |  |  |
Loans individually evaluated for impairment |  | $ 3,000 |  | $ 17,000 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.00% |  |  |
Finance Leases Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |
Allowance for loan losses individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Loans individually evaluated for impairment |  | $ 0 |  | $ 0 |  |  |
Allowance for loan losses as a percentage of loan balance individually evaluated for impairment |  | 0.00% |  | 0.00% |  |  |
[1] | Included within each of commercial, financial and agricultural loans and commercial real estate loans is an immaterial amount of consumer loans that were not broken out by class.

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- Definition Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance as a percentage of loan balance + References No definition available. + Details
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- Definition Reserve for loans impairments recorded after acquisition as a result of current information and events which result in it being probable that estimated cash flows will be less than previously expected or because actual cash flows are less than cash flows previously expected. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481696/310-30-50-2 + Details
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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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- Definition Amount of allowance for credit loss on financing receivable evaluated on collective basis. Excludes financing receivable evaluated on individual basis. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.5.a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480418/310-10-S99-4 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 30 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479391/326-20-30-2 + Details
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- Definition Amount of allowance for credit loss on financing receivable evaluated on individual basis. Excludes financing receivable evaluated on collective basis. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.5.a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480418/310-10-S99-4 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 30 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479391/326-20-30-2 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC + Details
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- Definition Amount of financing receivable collectively evaluated for credit loss. Excludes financing receivable individually evaluated for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.5.a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480418/310-10-S99-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11C + Details
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