CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Deferred tax, change in net unrealized gains (losses) on investments	$ 2,976		$ 8,390		$ 7,796		$ 8,573
Deferred tax, change in foreign currency translation gains (losses)	452		(4)		1,851		359
Disclosure of reclassification amount, net of tax:
Unrealized gains (losses) on investments arising during period	9,039		15,450		17,643		16,011
Reclassification adjustment for net realized gains (losses) included in net income	(1,607)		1,326		(1,335)		830
Reclassification adjustment for other-than-temporary impairment losses recognized in net income	172		57		245		30
Change in net unrealized gains (losses) on investments, net of tax	$ 7,604	[1]	$ 16,833	[1]	$ 16,553	[2]	$ 16,871	[2]

[1] Disclosure of reclassification amount, net of tax: Unrealized gains (losses) on investments arising during period $ 9,039 $ 15,450 Reclassification adjustment for net realized gains (losses) included in net income (1,607 ) 1,326 Reclassification adjustment for other-than-temporary impairment losses recognized in net income 172 57 Change in net unrealized gains (losses) on investments, net of tax $ 7,604 $ 16,833

[2] Disclosure of reclassification amount, net of tax: Unrealized gains (losses) on investments arising during period $ 17,643 $ 16,011 Reclassification adjustment for net realized gains (losses) included in net income (1,335 ) 830 Reclassification adjustment for other-than-temporary impairment losses recognized in net income 245 30 Change in net unrealized gains (losses) on investments, net of tax $ 16,553 $ 16,871