Investments (Aggregate Carrying And Approximate Market Values Of Available-For-Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	$ 381,593	$ 358,281
Securities available-for-sale, Gross Unrealized Gains	11,728	9,885
Securities available-for-sale, Gross Unrealized Losses	3,635	7,383
Securities available-for-sale, Estimated Fair Value	389,686	360,783
U.S Treasuries and U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	4,310	5,868
Securities available-for-sale, Gross Unrealized Gains	105	173
Securities available-for-sale, Estimated Fair Value	4,415	6,041
Obligations Of States And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	48,334	55,262
Securities available-for-sale, Gross Unrealized Gains	1,814	1,561
Securities available-for-sale, Gross Unrealized Losses	15	21
Securities available-for-sale, Estimated Fair Value	50,133	56,802
U.S. Government Agencies Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	285,678	220,815
Securities available-for-sale, Gross Unrealized Gains	8,695	6,966
Securities available-for-sale, Gross Unrealized Losses	45	168
Securities available-for-sale, Estimated Fair Value	294,328	227,613
Private Label [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	3,583	5,117
Securities available-for-sale, Gross Unrealized Gains	43	45
Securities available-for-sale, Gross Unrealized Losses		6
Securities available-for-sale, Estimated Fair Value	3,626	5,156
Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	18,405	48,951
Securities available-for-sale, Gross Unrealized Gains	201	941
Securities available-for-sale, Gross Unrealized Losses	3,098	4,735
Securities available-for-sale, Estimated Fair Value	15,508	45,157
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	16,178	16,226
Securities available-for-sale, Gross Unrealized Gains	251	160
Securities available-for-sale, Gross Unrealized Losses	466	1,988
Securities available-for-sale, Estimated Fair Value	15,963	14,398
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	376,488	352,239
Securities available-for-sale, Gross Unrealized Gains	11,109	9,846
Securities available-for-sale, Gross Unrealized Losses	3,624	6,918
Securities available-for-sale, Estimated Fair Value	383,973	355,167
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	3,381	4,318
Securities available-for-sale, Gross Unrealized Gains	551
Securities available-for-sale, Gross Unrealized Losses	11	465
Securities available-for-sale, Estimated Fair Value	3,921	3,853
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	68	39
Securities available-for-sale, Estimated Fair Value	$ 1,792	$ 1,763

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 12

-Subparagraph b

-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

-Publisher FASB

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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 15C

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

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Reference 7: 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

-Name Statement of Financial Accounting Standard (FAS)

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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