Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	$ 126,119		$ 295,271
Other Comprehensive Loss Net Of Tax	3,883	58,463	(165,269)	90,580
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	130,002		130,002
Net realized investment gain	17,922	832	31,115	7,491
Income tax expense	6,272	291	10,890	2,622
Total reclassifications	11,650	541	20,225	4,869
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	113,942		282,503
Other Comprehensive Loss Net Of Tax	(1,619)		(170,180)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	112,323		112,323
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	12,177		12,768
Other Comprehensive Loss Net Of Tax	5,502		4,911
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	17,679		17,679
Accumulated other comprehensive income [Member]
Other Comprehensive Loss Net Of Tax			$ (165,269)