Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net earnings	$ 92,729	$ 88,727	$ 266,002	$ 249,470
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax of $4,859 and $4,922 for the three months ended September 30, 2013 and 2012, and $6,557 and $4,164 for the nine months ended September 30, 2013 and 2012	8,751	8,982	(12,275)	7,691
Reclassification adjustments for foreign currency realized losses, net of tax of $350 for the three and nine months ended September 30, 2012	0	650	0	650
Other comprehensive income (loss)	8,751	9,632	(12,275)	8,341
Comprehensive income	101,480	98,359	253,727	257,811
Less comprehensive income attributable to the noncontrolling interest	211	257	667	428
Comprehensive income attributable to shareholders	$ 101,269	$ 98,102	$ 253,060	$ 257,383