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Investments (Aggregate Carrying And Approximate Market Values Of Available-For-Sale Securities) (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | $ 425,094 | $ 367,884
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 10,974 | 5,099
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 1,351 | 3,517
Securities available-for-sale | 434,717 | 369,466
U.S Treasuries and U.S. Government Agencies [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 4 | 5
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Securities available-for-sale | 4 | 5
Obligations Of States And Political Subdivisions [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 62,845 | 49,725
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 1,669 | 979
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 79 | 7
Securities available-for-sale | 64,435 | 50,697
U.S. Government Agencies Mortgage-backed Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 327,608 | 287,933
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 5,896 | 2,285
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 302 | 2,021
Securities available-for-sale | 333,202 | 288,197
Private Label [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 1,000 | 1,222
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 2 | 9
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Securities available-for-sale | 1,002 | 1,231
Trust Preferred Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 6,049 | 6,550
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 1,206 | 463
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 844 | 1,155
Securities available-for-sale | 6,411 | 5,858
Corporate Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 23,927 | 18,793
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 613 | 221
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 126 | 321
Securities available-for-sale | 24,414 | 18,693
Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 421,433 | 364,228
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 9,386 | 3,957
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 1,351 | 3,504
Securities available-for-sale | 429,468 | 364,681
Equity Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 2,136 | 2,131
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 1,577 | 1,142
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Securities available-for-sale | 3,713 | 3,273
Money Market Funds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, Amortized Cost | 1,525 | 1,525
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax | 11 | 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax | 0 | 13
Securities available-for-sale | $ 1,536 | $ 1,512

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 + Details
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