Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income (loss)	$ 13,910	$ 7,904
Change in net unrealized gains (losses) on investments:
Unrealized gains (losses) on investments arising during the period, net of deferred tax of $617 and $4,937 in 2013 and 2012, respectively	1,145	9,168
Reclassification adjustment for net realized (gains) losses included in net income net of deferred tax of $1,770 and $344 in 2013 and 2012, respectively	(3,179)	(638)
Change in net unrealized gains (losses) on investments	(2,034)	8,530
Change in other-than-temporary impairments:
Non-credit other-than-temporary impairments arising during the period, net of deferred tax of $150 and $241 in 2013 and 2012, respectively	279	448
Reclassification adjustment for non-credit other-than-temporary impairment losses recognized in net income net of deferred tax of $16 in 2012		(29)
Change in other-than-temporary impairments	279	419
Change in foreign currency translation gains (losses), net of deferred tax of $1,543 and $1,399 in 2012 and 2011, respectively	2,630	(2,972)
Other comprehensive income (loss)	875	5,977
Comprehensive income (loss)	$ 14,785	$ 13,881