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

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

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

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Amount before tax of unrealized loss 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 (c)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

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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

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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