Investments (Cumulative Credit Loss Portion of Other Than Temporary Impairment Recognized in Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Investments [Abstract]
Cumulative credit loss at beginning of period	$ (127,459)	$ (128,513)	$ (125,960)	$ (134,027)
Credit losses on securities for which OTTI has not previously been recognized	0	0	0	(4,536)
Additional credit losses on securities for which OTTI has previously been recognized	(564)	(222)	(2,063)	(1,270)
Accumulated losses on securities that were disposed of during the period	0	2,775	0	13,873
Cumulative credit loss at end of period	$ (128,023)	$ (125,960)	$ (128,023)	$ (125,960)