Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net Earnings	$ 135,709	$ 78,233	$ 120,666
Other Comprehensive (Loss) Income:
Foreign Currency Translation Adjustment	(427)	(26)	5
Total Other Comprehensive (Loss) Income	(427)	(26)	5
Comprehensive Income	$ 135,282	$ 78,207	$ 120,671