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v3.20.1

Loans And Related Allowances For Loan Losses (Narrative) (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 USD ($) loan | Dec. 31, 2019 USD ($) loan region | Dec. 31, 2018 USD ($) loan
Financing Receivable, Modifications [Line Items] |  |  |
Commercial amount benchmark minimum for internal annual review |  | $ 500,000 |
Commercial amount benchmark minimum for annual review by independent reviewer |  | 1,000,000 |
Non consumer loan amount benchmark minimum for annual review by independent reviewer |  | 500,000 |
Nonaccrual loans subject to partial charge off |  | 10,849,000 | $ 4,922,000
Commercial relationship amount benchmark for evaluation |  | 750,000 |
Maximum commercial loan benchmark for external appraisal |  | $ 500,000 |
Past appraisal period benchmark for external appraisal |  | 18 months |
Threshold limit for commercial loan appraisal by internal discounted appraisal grid |  | $ 500,000 |
Financing receivable, modifications, number of contracts | loan |  | 15 | 16
Financing receivable, modifications, recorded investment |  | $ 4,200,000 | $ 4,900,000
Financing receivable, modifications, subsequent default, recorded investment |  | $ 0 |
Pass [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of geographic regions utilized | region |  | 7 |
Number of geographic regions that represent lending footprint | region |  | 6 |
Partial Charge Off [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual loans subject to partial charge off |  | $ 100,000 | 300,000
New TDR [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing receivable, modifications, number of contracts | loan |  | 2 |
Financing receivable, modifications, recorded investment |  | $ 200,000 |
Existing Troubled Debt Restructuring Loans Remodified After Maturity [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing receivable, modifications, number of contracts | loan |  | 2 |
Troubled Debt Restructuring [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Unused commitments to extend credit |  | $ 0 | 0
Foreclosure 1-4 Family Real Estate Properties [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Loans secured by real estate properties in process of foreclosure |  | 100,000 | 300,000
Commercial real estate- non owner-occupied [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual loans subject to partial charge off |  | 33,000 | 173,000
Commercial real estate- all other CRE [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual loans subject to partial charge off |  | 647,000 | 1,968,000
Acquisition and development- All other A&D [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual loans subject to partial charge off |  | 8,058,000 | 147,000
Acquisition and development- All other A&D [Member] | Substandard [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing receivable, modifications, number of contracts | loan | 1 |  |
Financing receivable, modifications, recorded investment | $ 8,000,000 |  |
Commercial and industrial [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual loans subject to partial charge off |  | 30,000 |
Residential mortgage- term [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual loans subject to partial charge off |  | 1,219,000 | 1,911,000
Residential mortgage- home equity [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual loans subject to partial charge off |  | 858,000 | 713,000
Consumer [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Nonaccrual loans subject to partial charge off |  | $ 4,000 | $ 10,000

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