Investments Realized investment gains, losses and OTTI (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments [Abstract]
Gross realized gains	$ 756	$ 0	$ 2,118	$ 22
Gross realized losses	0	0	(75)	(12)
Total net gains from investment sales	756	0	2,043	10
Impairment write-downs (other-than-temporary impairments)	0	(16)	0	(16)
Net realized investment gains	$ 756	$ (16)	$ 2,043	$ (6)

This item represents the total realized gain (loss) included in earnings for the period as a result of selling marketable securities categorized as trading, available-for-sale, or held-to-maturity. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

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The amount of other than temporary impairment losses on investments in debt and equity securities categorized as Available-for-sale which have been recognized in earnings during the period. Such impairment losses consist of other than temporary impairments (OTTI) on equity securities, credit losses on investments in debt securities, and when the entity intends to sell an impaired debt security or it is more likely than not that the entity will be required to sell the impaired debt security before recovery of its amortized cost basis.

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