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Investments (OTTI by Asset Type) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
OTTI Losses Gross	$ 921	$ 2,693	$ 1,218	$ 3,062
Other-than-temporary impairments on fixed maturity securities recognized in other comprehensive income	(2,023)	150	(2,241)	(280)
OTTI Losses Recognized in Earnings	2,944	2,543	3,459	3,342
Equity Securities [Member]
OTTI Losses Gross	2,389	2,312	2,560	2,312
Other-than-temporary impairments on fixed maturity securities recognized in other comprehensive income	0	0	0	0
OTTI Losses Recognized in Earnings	2,389	2,312	2,560	2,312
Fixed Maturity Securities [Member]
OTTI Losses Gross	(1,468)	381	(1,342)	750
Other-than-temporary impairments on fixed maturity securities recognized in other comprehensive income	(2,023)	150	(2,241)	(280)
OTTI Losses Recognized in Earnings	555	231	899	1,030
Fixed Maturity Securities [Member] | Obligations of States and Political Subdivisions [Member]
OTTI Losses Gross				17
Other-than-temporary impairments on fixed maturity securities recognized in other comprehensive income				0
OTTI Losses Recognized in Earnings				17
Fixed Maturity Securities [Member] | Corporate Securities [Member]
OTTI Losses Gross				244
Other-than-temporary impairments on fixed maturity securities recognized in other comprehensive income				0
OTTI Losses Recognized in Earnings				244
Fixed Maturity Securities [Member] | Asset-backed Securities [Member]
OTTI Losses Gross	36	543	98	543
Other-than-temporary impairments on fixed maturity securities recognized in other comprehensive income	0	493	0	493
OTTI Losses Recognized in Earnings	36	50	98	50
Fixed Maturity Securities [Member] | Commercial Mortgage-backed Securities ("CMBS") [Member]
OTTI Losses Gross	(1,504)	(184)	(1,396)	(370)
Other-than-temporary impairments on fixed maturity securities recognized in other comprehensive income	(2,023)	(316)	(2,023)	(974)
OTTI Losses Recognized in Earnings	519	132	627	604
Fixed Maturity Securities [Member] | Residential Mortgage Backed Securities ("RMBS") [Member]
OTTI Losses Gross		22	(44)	316
Other-than-temporary impairments on fixed maturity securities recognized in other comprehensive income		(27)	(218)	201
OTTI Losses Recognized in Earnings		$ 49	$ 174	$ 115

X

- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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- Definition

Before tax amount of other than temporary impairment (OTTI) on a debt security, categorized as either available-for-sale or held-to-maturity, recognized in other comprehensive income (loss).

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The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

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