Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net earnings	$ 338,241	$ 306,094	$ 290,847
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(82,875)	21,903	15,641
Unrealized gains (losses) on cash flow hedging arrangements:
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(768)	(491)	(1,748)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	1,257	3,496	2,029
Net actuarial gains (losses)	(106,837)	30,381	(46,792)
Plan amendments and prior service cost	1,607	2,371	18,017
Amortization of actuarial (gains) losses and plan amendments and prior service cost	1,614	6,775	4,261
Defined Benefit Plans, Impact of FX on Current Year Change in OCI, net of tax	8,089	(2,010)	(1,931)
Total other comprehensive income (loss), net of tax	(177,913)	62,425	(10,523)
Total other comprehensive income (loss), net of tax	$ 160,328	$ 368,519	$ 280,324