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Investments (Aggregate Carrying And Approximate Market Values Of Available-For-Sale Securities) (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 472,340 | $ 453,697
Gross Unrealized Gains | 5,489 | 5,488
Gross Unrealized Losses | 7,731 | 9,102
Securities available-for-sale | 470,098 | 450,083
U.S Treasuries and U.S. Government Agencies [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 3 | 3
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Securities available-for-sale | 3 | 3
Obligations Of States And Political Subdivisions [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 95,440 | 83,248
Gross Unrealized Gains | 983 | 594
Gross Unrealized Losses | 1,223 | 1,474
Securities available-for-sale | 95,200 | 82,368
U.S. Government Agencies Mortgage-backed Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 343,681 | 335,867
Gross Unrealized Gains | 1,548 | 1,507
Gross Unrealized Losses | 6,075 | 6,560
Securities available-for-sale | 339,154 | 330,814
Private Label [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 877 | 941
Gross Unrealized Gains | 2 | 1
Gross Unrealized Losses | 0 | 0
Securities available-for-sale | 879 | 942
Trust Preferred Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 4,755 | 6,052
Gross Unrealized Gains | 133 | 1,164
Gross Unrealized Losses | 201 | 554
Securities available-for-sale | 4,687 | 6,662
Corporate Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 23,923 | 23,925
Gross Unrealized Gains | 361 | 127
Gross Unrealized Losses | 196 | 478
Securities available-for-sale | 24,088 | 23,574
Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 468,679 | 450,036
Gross Unrealized Gains | 3,027 | 3,393
Gross Unrealized Losses | 7,695 | 9,066
Securities available-for-sale | 464,011 | 444,363
Equity Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 2,136 | 2,136
Gross Unrealized Gains | 2,462 | 2,095
Gross Unrealized Losses | 0 | 0
Securities available-for-sale | 4,598 | 4,231
Money Market Funds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 1,525 | 1,525
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 36 | 36
Securities available-for-sale | $ 1,489 | $ 1,489

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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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