CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]
Net income including non-controlling interests	$ 66,843	$ 64,149
Other comprehensive (loss) income, net of tax:
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax of $(113) in 2013; $(75) in 2012	602	(498)
Defined benefit pension plan activity, net of tax of $3,068 in 2013; $2,844 in 2012	5,105	4,846
Currency translation adjustment	(14,239)	25,563
Other comprehensive (loss) income:	(8,532)	29,911
Comprehensive income	58,311	94,060
Comprehensive income (loss) attributable to non-controlling interests	150	(25)
Comprehensive income attributable to shareholders	$ 58,161	$ 94,085