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Investments (Aggregate Carrying And Approximate Market Values Of Available-For-Sale Securities) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, amortized cost | $ 453,697 | $ 367,884
Available-for-sale debt securities, accumulated gross unrealized gain, before tax | 5,488 | 5,099
Available-for-sale debt securities, accumulated gross unrealized loss, before tax | 9,102 | 3,517
Securities available-for-sale | 450,083 | 369,466
U.S. Government agencies |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, amortized cost | 3 | 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 | 3 | 5
Obligations of states and political subdivisions |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, amortized cost | 83,248 | 49,725
Available-for-sale debt securities, accumulated gross unrealized gain, before tax | 594 | 979
Available-for-sale debt securities, accumulated gross unrealized loss, before tax | 1,474 | 7
Securities available-for-sale | 82,368 | 50,697
U.S. Government agencies |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, amortized cost | 335,867 | 287,933
Available-for-sale debt securities, accumulated gross unrealized gain, before tax | 1,507 | 2,285
Available-for-sale debt securities, accumulated gross unrealized loss, before tax | 6,560 | 2,021
Securities available-for-sale | 330,814 | 288,197
Private label |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, amortized cost | 941 | 1,222
Available-for-sale debt securities, accumulated gross unrealized gain, before tax | 1 | 9
Available-for-sale debt securities, accumulated gross unrealized loss, before tax | 0 | 0
Securities available-for-sale | 942 | 1,231
Trust preferred securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, amortized cost | 6,052 | 6,550
Available-for-sale debt securities, accumulated gross unrealized gain, before tax | 1,164 | 463
Available-for-sale debt securities, accumulated gross unrealized loss, before tax | 554 | 1,155
Securities available-for-sale | 6,662 | 5,858
Corporate securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, amortized cost | 23,925 | 18,793
Available-for-sale debt securities, accumulated gross unrealized gain, before tax | 127 | 221
Available-for-sale debt securities, accumulated gross unrealized loss, before tax | 478 | 321
Securities available-for-sale | 23,574 | 18,693
Debt Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Securities available-for-sale, amortized cost | 450,036 | 364,228
Available-for-sale debt securities, accumulated gross unrealized gain, before tax | 3,393 | 3,957
Available-for-sale debt securities, accumulated gross unrealized loss, before tax | 9,066 | 3,504
Securities available-for-sale | 444,363 | 364,681
Equity Securities |  |
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 | 2,095 | 1,142
Available-for-sale debt securities, accumulated gross unrealized loss, before tax | 0 | 0
Securities available-for-sale | 4,231 | 3,273
Investment funds |  |
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 | 0 | 0
Available-for-sale debt securities, accumulated gross unrealized loss, before tax | 36 | 13
Securities available-for-sale | $ 1,489 | $ 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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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562 + Details
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