Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net Earnings	$ 28,941	$ 28,045	$ 136,411	$ 83,233
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustments for the Three and Nine Months, Net of Tax of $(1,020) and $(796) at September 30, 2012, respectively, and $576 and $438 at September 30, 2011, respectively	1,395	(1,515)	1,030	(1,153)
Unrealized Loss on Derivatives Designated as Hedges for the Nine Months, Net of Tax of $7 at September 30, 2011				(12)
Total Other Comprehensive Income (Loss)	1,395	(1,515)	1,030	(1,165)
Comprehensive Income	$ 30,336	$ 26,530	$ 137,441	$ 82,068