Investments (Estimated Fair Value Of Investments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Fixed maturity securities:
Due in one year or less	$ 59,117
Due after one year through five years	336,590
Due after five years through ten years	564,076
Due after ten years	1,600,870
Total	$ 2,560,653
Percentage of fixed maturities	1.50%