Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income (loss)	$ 13,937	$ 14,899	$ 27,847	$ 22,803
Change in net unrealized gains (losses) on investments:
Unrealized gains (losses) on investments arising during the period, net of deferred tax of $19,404 and $3,790 for 3 months ended June 30, 2013 and June 30, 2012 and $19,037 and $8,237 for 6 months ended June 30, 2013 and June 30, 2012, respectively	(36,123)	9,113	(35,335)	17,371
Reclassification adjustment for net realized (gains) losses included in net income net of deferred tax of $870 and $865 for 3 months ended June 30, 2013 and June 30, $2,390 and $719 for 6 months ended June 30, 2013 and June 30, 2012, respectively	(1,616)	(1,607)	(4,438)	(1,335)
Change in net unrealized gains (losses) on investments	(37,739)	7,506	(39,773)	16,036
Change in other-than-temporary impairments:
Non-credit other-than-temporary impairments arising during the period, net of deferred tax of $13 and $53 for 3 months ended June 30, 2013 and June 30, 2012 and $163 and $263 for 6 months ended June 30, 2013 and June 30, 2012, respectively	24	98	303	489
Reclassification adjustment for non-credit other-than-temporary impairment losses recognized in net income				28
Change in other-than-temporary impairments	24	98	303	517
Change in foreign currency translation gains (losses), net of deferred tax of $566 and $452 for 3 months ended June 30, 2013 and June 30, 2012,and $975 and $1,851 for 6 months ended June 30, 2013 and June 30, 2012, respectively	(1,051)	(840)	1,579	(3,812)
Other comprehensive income (loss)	(38,766)	6,764	(37,891)	12,741
Comprehensive income (loss)	$ (24,829)	$ 21,663	$ (10,044)	$ 35,544