Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Consolidated Statements of Comprehensive Income
Unrealized holding gains (losses) arising during the period, tax provision (benefit)	$ (42,585)	$ 66,835	$ (28,629)
Reclassification adjustment for gains (losses) included in net income (loss), tax provision (benefit)	(2,829)	1,435	(7,106)
Change in cumulative translation adjustment, tax provision (benefit)	(229)	(759)	(3,299)
Change in cash flow hedge, tax provision (benefit)	$ (225)	$ (225)	$ (225)

Total tax effect of the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. The change includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph c(3)

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 25

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Tax effect of the adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into functional currency of the reporting entity.

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