Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 25,306	$ 27,165	$ 71,696	$ 115,174
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(1,372)	41	(1,201)	(1,330)
Total other comprehensive income (loss)	(1,372)	41	(1,201)	(1,330)
COMPREHENSIVE INCOME	$ 23,934	$ 27,206	$ 70,495	$ 113,844