CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Comprehensive Income Net Of Tax Abstract
Net income	$ 123,318	$ 148,920
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease Abstract
Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax	24,080	24,407
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax	(35,415)	(35,818)
Change In Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income	4,694	0
Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax	290	214
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease	(6,351)	(11,197)
Comprehensive Income Net Of Tax	$ 116,967	$ 137,723