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Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | $ 323,918 | $ 73,478
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 4,454 | 245
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 20,439 | 4,135
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 400 | 457
Securities available-for-sale, Total, Estimated Fair Value | 344,357 | 77,613
Securities available-for-sale, Total, Unrealized Loss | 4,854 | 702
Obligations of states and political subdivisions |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 97,157 | 10,578
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 1,086 | 139
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 2,386 | 0
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 98 | 0
Securities available-for-sale, Total, Estimated Fair Value | 99,543 | 10,578
Securities available-for-sale, Total, Unrealized Loss | 1,184 | 139
U.S. Government Agencies Mortgage-backed Securities |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 225,763 | 62,412
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 3,366 | 105
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 13,290 | 35
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 16 | 0
Securities available-for-sale, Total, Estimated Fair Value | 239,053 | 62,447
Securities available-for-sale, Total, Unrealized Loss | 3,382 | 105
Trust preferred securities |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 0 | 0
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 0 | 0
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 4,275 | 4,100
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 285 | 457
Securities available-for-sale, Total, Estimated Fair Value | 4,275 | 4,100
Securities available-for-sale, Total, Unrealized Loss | 285 | 457
Corporate securities |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 998 | 488
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 2 | 1
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 488 | 0
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 1 | 0
Securities available-for-sale, Total, Estimated Fair Value | 1,486 | 488
Securities available-for-sale, Total, Unrealized Loss | $ 3 | $ 1

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 + Details
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