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Investments (Details Textuals) (USD $)	3 Months Ended		6 Months Ended
Investments (Details Textuals) (USD $)	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Investment [Abstract]
Condition for categorizing the impaired securities			$ 500,000
Condition for categorizing the impaired securities, percentage			10.00%
Other-than-temporary impairment credit losses	0	397,000	0	397,000
Gross unrealized losses on fixed income securities	$ 90,200,000		$ 90,200,000
Weighted-average life of mortgage-backed and asset-backed securities, Years	6.2		6.2

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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