CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income including non-controlling interests	$ 291,687	$ 257,216	$ 217,013
Unrealized (loss) gain on derivatives designated and qualifying as cash flow hedges, net of tax of ($141) in 2013; ($201) in 2012; $264 in 2011	289	(832)	1,264
Defined pension plan activity, net of tax of $60,556 in 2013, ($3,492) in 2012; ($47,413) in 2011	101,151	(6,475)	(79,936)
Currency translation adjustment	(19,955)	19,635	(26,773)
Transactions with non-controlling interests	155	0	0
Other comprehensive income (loss)	81,640	12,328	(105,445)
Comprehensive income	373,327	269,544	111,568
Comprehensive (loss) income attributable to non-controlling interests	(3,912)	(348)	315
Comprehensive income attributable to shareholders	377,239	269,892	111,253
Accumulated Other Comprehensive Income (Loss) [Member]
Unrealized (loss) gain on derivatives designated and qualifying as cash flow hedges, net of tax of ($141) in 2013; ($201) in 2012; $264 in 2011	289	(832)	1,264
Defined pension plan activity, net of tax of $60,556 in 2013, ($3,492) in 2012; ($47,413) in 2011	101,151	(6,475)	(79,936)
Currency translation adjustment	$ (18,136)	$ 19,788	$ (27,261)