Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Unrealized gains (losses) on investments arising during the period, deferred tax	$ 1,723	$ 7,010
Reclassification adjustment for net realized (gains) losses included in net income, deferred tax	698	366
Non credit other-than-temporary impairments arising during the period, deferred tax	8	(31)
Reclassification adjustment for non credit other-than-temporary impairment losses recognized in net income, deferred tax	0	0
Change in foreign currency translation gains (losses), deferred tax	$ 429	$ 3,584