Investments Investments (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Investments [Abstract]
Assets Held by Insurance Regulators	$ 14,900,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	7,000	19,000
Limited liability investments	1,476,000	2,333,000
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	4,700,000
Other investments, at cost which approximates fair value	2,000,000	2,000,000
Deposit Liabilities, Collateral Issued, Description	$ 23,100,000