Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Unrealized gains (losses) on investments arising during the period, deferred tax	$ 2,676	$ 8,845	$ 14,988	$ 16,564
Reclassification adjustment for net realized (gains) losses included in net income, deferred tax	322	1,152	3,442	1,353
Non credit other-than-temporary impairments arising during the period, deferred tax	30	213	134	476
Reclassification adjustment for non credit other-than-temporary impairment losses recognized in net income, deferred tax	0	0		15
Change in foreign currency translation gains (losses), deferred tax	$ 867	$ 1,679	$ 108	$ 172