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Derivative Financial Instruments (Schedule Of Derivative Gains And Losses In The Consolidated Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Derivatives Not Designated as Hedging Instruments [Member]
Derivative Financial Instruments [Line Items]
Gain (Loss) Recognized in Income	$ 3,247	$ 10,232	$ 4,158
Interest rate swap agreements [Member] \| Other comprehensive income (loss) [Member] \| Derivatives Contracts for Cash Flow Hedges [Member]
Derivative Financial Instruments [Line Items]
Gain (Loss) Recognized in Comprehensive Income	0	1,139	(220)
Interest rate swap agreements [Member] \| Other revenue (expense) [Member] \| Derivatives Not Designated as Hedging Instruments [Member]
Derivative Financial Instruments [Line Items]
Gain (Loss) Recognized in Income	567	1,232	(457)
Equity contracts [Member] \| Net realized investment gains [Member] \| Derivatives Not Designated as Hedging Instruments [Member]
Derivative Financial Instruments [Line Items]
Gain (Loss) Recognized in Income	$ 2,680	$ 9,000	$ 4,615

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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