Investing Activities Other than Temporary Impairment, Credit Losses Recognized in Earnings Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Investments, Debt and Equity Securities [Abstract]
Total debt impairments recognized	$ 2,000,000	$ 2,800,000	$ 2,800,000
Total equity impairments recognized	0	0	400,000
Amount of impairments recognized as adjustment to other comprehensive loss	(900,000)	2,200,000	6,900,000
Limited partnerships and other investment impairment	$ 0	$ 0	$ 0