Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 21,852	$ 36,232
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on securities	11,902	(253)
Unrealized gain on securities for which credit losses have been recognized in earnings	298	632
Foreign currency translation adjustment	(6,040)	(6,822)
Pension benefit adjustment	3,891	4,144
Total other comprehensive income (loss), net of tax	10,051	(2,299)
Comprehensive income	31,903	33,933
Less: Comprehensive income attributable to noncontrolling interests	131	55
Comprehensive income attributable to the Company	$ 31,772	$ 33,878