Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings (loss)	$ 94,455	$ 13,753	$ 101,778	$ (6,090)
Foreign currency translation adjustments, net of tax of $(57) and $(565), and $81 and $(127), for the three and six months ended 2019 and 2018, respectively	(217)	(2,125)	304	(477)
Total other comprehensive income (loss)	(217)	(2,125)	304	(477)
Comprehensive income (loss)	$ 94,238	$ 11,628	$ 102,082	$ (6,567)