Investments (Fixed Maturities Proceeds)(Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Equity Securities [Member]
Available For Sale
Proceeds from sales	$ 14		$ 3,201		$ 0
Gross investment gains from sales	10		703		0
Fixed Maturities, Available For Sale [Member]
Available For Sale
Proceeds from sales	314,415		504,001		1,121,792
Proceeds from maturities/repayments	1,175,680		861,512		545,155
Gross investment gains from sales	18,619		23,077		75,580
Available-for-sale Securities, Gross Realized Losses	9,824		134		223
Fixed maturity and equity security impairments
Net writedowns for other-than-temporary impairment losses on fixed maturities recognized in earnings	$ 0	[1]	$ (258)	[1]	$ (962)	[1]

[1] Excludes the portion of other-than-temporary impairments recorded in “Other comprehensive income (loss),” representing any difference between the fair value of the impaired debt security and the net present value of its projected future cash flows at the time of the impairment.