Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 128,238	$ 181,703	$ 163,464
Foreign currency translation adjustments	(2,017)	2,775	(3,992)
Total other comprehensive income (loss)	(2,017)	2,775	(3,992)
COMPREHENSIVE INCOME	$ 126,221	$ 184,478	$ 159,472