CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 73,072	$ 52,857	$ 171,482	$ 127,509
Other comprehensive loss, net of tax:
Pension Plans	0	163	0	163
Cash flow hedges	(599)	359	(1,009)	(362)
Foreign currency translation adjustments	(16,672)	(48,994)	(52,138)	(57,800)
Total other comprehensive loss	(17,271)	(48,472)	(53,147)	(57,999)
Comprehensive income	$ 55,801	$ 4,385	$ 118,335	$ 69,510