Investments (Schedule Of Available For Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 0	$ 226,397
Gross Unrealized Gains		17,911
Gross Unrealized Losses		(292)
Fair Value	0	244,016
U.S. Government And Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		31,309
Gross Unrealized Gains		2,321
Fair Value		33,630
States, Municipalities And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		29,128
Gross Unrealized Gains		4,351
Fair Value		33,479
Corporate Debt, Financial Institutions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		17,431
Gross Unrealized Gains		348
Gross Unrealized Losses		(292)
Fair Value		17,487
Corporate Debt, Industrials [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		73,539
Gross Unrealized Gains		4,268
Fair Value		77,807
Corporate Debt, Utilities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		74,990
Gross Unrealized Gains		6,623
Fair Value		$ 81,613

Amount of available-for-sale debt securities at cost, net of adjustments, which include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

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

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

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

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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

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

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 10: http://www.xbrl.org/2003/role/presentationRef

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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.

+ 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