Investments (Aggregate Carrying And Approximate Market Values Of Available-For-Sale Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 503,642	$ 453,697
Gross Unrealized Gains	7,103	5,488
Gross Unrealized Losses	6,085	9,102
Securities available-for-sale	504,660	450,083
U.S Treasuries and U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2	3
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Securities available-for-sale	2	3
Obligations Of States And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	96,517	83,248
Gross Unrealized Gains	1,927	594
Gross Unrealized Losses	702	1,474
Securities available-for-sale	97,742	82,368
U.S. Government Agencies Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	373,998	335,867
Gross Unrealized Gains	1,705	1,507
Gross Unrealized Losses	5,206	6,560
Securities available-for-sale	370,497	330,814
Private Label [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	785	941
Gross Unrealized Gains	4	1
Gross Unrealized Losses	0	0
Securities available-for-sale	789	942
Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,758	6,052
Gross Unrealized Gains	218	1,164
Gross Unrealized Losses	0	554
Securities available-for-sale	4,976	6,662
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,921	23,925
Gross Unrealized Gains	485	127
Gross Unrealized Losses	149	478
Securities available-for-sale	24,257	23,574
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	499,981	450,036
Gross Unrealized Gains	4,339	3,393
Gross Unrealized Losses	6,057	9,066
Securities available-for-sale	498,263	444,363
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,136	2,136
Gross Unrealized Gains	2,764	2,095
Gross Unrealized Losses	0	0
Securities available-for-sale	4,900	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	28	36
Securities available-for-sale	$ 1,497	$ 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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