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Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
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Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | $ 2,769 | $ 142,874
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 125 | 867
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 22,663 | 42,660
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 1,033 | 2,650
Securities available-for-sale, Total, Estimated Fair Value | 25,432 | 185,534
Securities available-for-sale, Total, Unrealized Loss | 1,158 | 3,517
Obligations Of States And Political Subdivisions [Member] |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 480 | 2,406
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 3 | 5
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 0 | 128
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 0 | 2
Securities available-for-sale, Total, Estimated Fair Value | 480 | 2,534
Securities available-for-sale, Total, Unrealized Loss | 3 | 7
U.S. Government Agencies Mortgage-backed Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 16 | 129,612
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 0 | 688
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 17,020 | 34,044
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 128 | 1,333
Securities available-for-sale, Total, Estimated Fair Value | 17,036 | 163,656
Securities available-for-sale, Total, Unrealized Loss | 128 | 2,021
Corporate Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 2,273 | 10,856
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss | 122 | 174
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 1,025 | 2,231
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 4 | 147
Securities available-for-sale, Total, Estimated Fair Value | 3,298 | 13,087
Securities available-for-sale, Total, Unrealized Loss | 126 | 321
Money Market Funds [Member] |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value |  | 0
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss |  | 0
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value |  | 1,488
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss |  | 13
Securities available-for-sale, Total, Estimated Fair Value |  | 1,488
Securities available-for-sale, Total, Unrealized Loss |  | 13
Asset-backed Securities [Member] |  |
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 | 4,618 | 4,769
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss | 901 | 1,155
Securities available-for-sale, Total, Estimated Fair Value | 4,618 | 4,769
Securities available-for-sale, Total, Unrealized Loss | $ 901 | $ 1,155

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