CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net Earnings	$ 71,226	$ 44,389
Other Comprehensive Income:
Foreign Currency Translation Adjustments , Net of Tax of $212 and $113 at March 31, 2012 and 2011, respectively	344	185
Unrealized Loss on Derivatives Designated as Hedges, Net of Tax of $12 at March 31, 2011		(20)
Total Other Comprehensive Income	344	165
Comprehensive Income	$ 71,570	$ 44,554