Investments (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Investment [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	39,000		71,000
Available-for-sale Securities Pledged as Collateral	$ 13,064,000
Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure	11,098,000		7,294,000
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	2,400,000
Other Investments	3,551,000		3,576,000
Pledged Assets Separately Reported, Nonsecuritized Investments Pledged as Collateral, at Fair Value	17,200,000
Other than Temporary Impairment Losses, Investments	$ (10,000)	$ 0