Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net Earnings	$ 49,687	$ 49,243
Other Comprehensive Income:
Foreign Currency Translation Adjustment	593	3
Total Other Comprehensive Income	593	3
Comprehensive Income	$ 50,280	$ 49,246