Investments (Credit Losses Recognized in Earnings on Fixed Maturity Securities Held by the Company) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other Than Temporary Impairment Credit Losses Recognized In Earnings Roll Forward
Balance, beginning of period	$ 11,696	$ 16,675
Credit loss impairments previously recognized on securities which were sold during the period	0	(1,902)
Balance, end of period	$ 11,696	$ 14,773