Investments (Credit Losses Recognized In Earnings on Fixed Maturity Securities Held by the Company) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period	$ 7,041	$ 8,729
Credit loss impairments previously recognized on securities which matured, paid down, prepaid or were sold during the period	(907)	(64)
Credit loss impairments previously recognized on securities impaired to fair value during the period	(670)	0
Credit loss impairments recognized in the current period on securities not previously impaired	420	0
Additional credit loss impairments recognized in the current period on securities previously impaired	0	12
Increases due to the passage of time on previously recorded credit losses	53	37
Accretion of credit loss impairments previously recognized due to an increase in cash flows expected to be collected	(79)	(86)
Balance, end of period	$ 5,858	$ 8,628