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Investments (Non-Cash OTTI Credit Losses Recognized In Earnings) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Investment Securities [Abstract]
Balance of credit-related OTTI, Beginning	$ 14,424	$ 14,653
Additional increases for credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost basis	0	19
Reduction for increases in cash flows expected to be collected	(465)	(248)
Balance of credit-related OTTI, Ending	$ 13,959	$ 14,424

The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

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