Investments (Details Textuals) (USD $)	12 Months Ended
	Dec. 31, 2011 rate years	Dec. 31, 2011 years
Investment [Abstract]
Condition for categorizing the impaired securities		$ 500,000
Condition for categorizing the impaired securities, percentage	10.00%	10.00%
Other-than-temporary impairments related to mortgage backed securities, after tax	900,000	900,000
Gross unrealized losses on fixed income securities	12,900,000	12,900,000
Weighted-average life of mortgage-backed and asset-backed securities, Years	4.3	4.3
Domestic insurance companies deposited fixed income securities (at fair value) required by state insurance departments.	42,300,000	42,300,000
Domestic insurance companies deposited fixed income securities (at amortized cost) required by state insurance departments.	$ 4,000,000	$ 4,000,000