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Investments (Aggregate Carrying And Approximate Market Values Of Held-To-Maturity Securities) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity, Amortized Cost | $ 49,036 | $ 60,827
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 1,562 | 173
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 0 | 294
Securities held-to-maturity, Estimated Fair Value | 50,598 | 60,706
US Government Agencies Debt Securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity, Amortized Cost | 49,036 | 56,827
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 1,562 | 173
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 0 | 294
Securities held-to-maturity, Estimated Fair Value | 50,598 | 56,706
Trust preferred securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Held-to-maturity, Amortized Cost | 0 | 4,000
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 0 | 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 0 | 0
Securities held-to-maturity, Estimated Fair Value | $ 0 | $ 4,000

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- Definition Amount of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
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- Definition Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
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