CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Deferred tax, change in net unrealized gains (losses) on investments	$ 4,818		$ 183
Deferred tax, change in foreign currency translation gains (losses)	1,399		363
Disclosure of reclassification amount, net of tax:
Unrealized gains (losses) on investments arising during period	9,421		183
Reclassification adjustment for net realized gains (losses) included in net income	(638)		(123)
Reclassification adjustment for other-than-temporary impairment losses recognized in net income	166		(22)
Change in net unrealized gains (losses) on investments, net of tax	$ 8,949	[1]	$ 38	[1]

[1] Disclosure of reclassification amount, net of tax: Unrealized gains (losses) on investments arising during period $ 9,421 $ 183 Reclassification adjustment for net realized gains (losses) included in net income (638 ) (123 ) Reclassification adjustment for other-than-temporary impairment losses recognized in net income 166 (22 ) Change in net unrealized gains (losses) on investments, net of tax $ 8,949 $ 38