Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Earnings (Loss)	$ 31,472	$ 196,210	$ 292,536
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment	1,068	(1,861)	1,305
Total Other Comprehensive Income (Loss)	1,068	(1,861)	1,305
Comprehensive Income	$ 32,540	$ 194,349	$ 293,841