Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 17,533	$ 41,876	$ 46,390	$ 88,009
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	268	(2,994)	171	(1,371)
Total other comprehensive income (loss)	268	(2,994)	171	(1,371)
COMPREHENSIVE INCOME	$ 17,801	$ 38,882	$ 46,561	$ 86,638