Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Unrealized gains (losses) on investments arising during the period, deferred tax	$ 17,521	$ 13,136	$ 17,776
Reclassification adjustment for net realized (gains) losses included in net income, deferred tax	6,218	10,314	2,588
Non credit other-than-temporary impairments arising during the period, deferred tax	174	612	39
Reclassification adjustment for non credit other-than-temporary impairment losses recognized in net income, deferred tax		16	84
Change in foreign currency translation gains (losses), deferred tax	$ 1,650	$ 521	$ 192