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Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
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Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | $ 360,612 | $ 73,478
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 2,416 | 245
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 38,931 | 4,135
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 358 | 457
Securities available-for-sale, Total, Estimated Fair Value | 399,543 | 77,613
Securities available-for-sale, Total, Unrealized Loss | 2,774 | 702
Obligations of states and political subdivisions |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 10,876 | 10,578
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 102 | 139
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 2,419 | 0
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 65 | 0
Securities available-for-sale, Total, Estimated Fair Value | 13,295 | 10,578
Securities available-for-sale, Total, Unrealized Loss | 167 | 139
U.S. Government Agencies Mortgage-backed Securities |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 349,736 | 62,412
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 2,314 | 105
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 32,229 | 35
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 13 | 0
Securities available-for-sale, Total, Estimated Fair Value | 381,965 | 62,447
Securities available-for-sale, Total, Unrealized Loss | 2,327 | 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 | 4,283 | 4,100
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 280 | 457
Securities available-for-sale, Total, Estimated Fair Value | 4,283 | 4,100
Securities available-for-sale, Total, Unrealized Loss | $ 280 | 457
Corporate securities |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value |  | 488
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss |  | 1
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value |  | 0
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss |  | 0
Securities available-for-sale, Total, Estimated Fair Value |  | 488
Securities available-for-sale, Total, Unrealized Loss |  | $ 1

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