Investments (Aggregate Carrying And Approximate Market Values Of Available-For-Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	$ 341,332	$ 370,315
Securities available-for-sale, Gross Unrealized Gains	9,662	10,131
Securities available-for-sale, Gross Unrealized Losses	2,848	3,324
Securities available-for-sale, Estimated Fair Value	348,146	377,122
U.S Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	3,295	3,792
Securities available-for-sale, Gross Unrealized Gains	88	96
Securities available-for-sale, Estimated Fair Value	3,383	3,888
Obligations Of States And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	44,311	47,293
Securities available-for-sale, Gross Unrealized Gains	1,508	1,651
Securities available-for-sale, Gross Unrealized Losses	18	15
Securities available-for-sale, Estimated Fair Value	45,801	48,929
U.S. Government Agencies Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	254,154	279,336
Securities available-for-sale, Gross Unrealized Gains	6,092	7,231
Securities available-for-sale, Gross Unrealized Losses	209	85
Securities available-for-sale, Estimated Fair Value	260,037	286,482
Private Label [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	2,946	3,235
Securities available-for-sale, Gross Unrealized Gains	27	37
Securities available-for-sale, Gross Unrealized Losses	5
Securities available-for-sale, Estimated Fair Value	2,968	3,272
Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	15,375	15,402
Securities available-for-sale, Gross Unrealized Gains	101	55
Securities available-for-sale, Gross Unrealized Losses	2,616	2,812
Securities available-for-sale, Estimated Fair Value	12,860	12,645
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	16,146	16,152
Securities available-for-sale, Gross Unrealized Gains	347	207
Securities available-for-sale, Gross Unrealized Losses		412
Securities available-for-sale, Estimated Fair Value	16,493	15,947
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	336,227	365,210
Securities available-for-sale, Gross Unrealized Gains	8,163	9,277
Securities available-for-sale, Gross Unrealized Losses	2,848	3,324
Securities available-for-sale, Estimated Fair Value	341,542	371,163
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	3,381	3,381
Securities available-for-sale, Gross Unrealized Gains	1,460	804
Securities available-for-sale, Estimated Fair Value	4,841	4,185
Investment Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	1,724	1,724
Securities available-for-sale, Gross Unrealized Gains	39	50
Securities available-for-sale, Estimated Fair Value	$ 1,763	$ 1,774

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 13

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 14

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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+ Details

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References+ Details

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details