Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (12,697)	$ 10,513	$ (28,083)	$ 16,881
Currency translation adjustment, net of tax	(1,326)	(6,405)	(272)	(7,239)
Comprehensive income (loss)	$ (14,023)	$ 4,108	$ (28,355)	$ 9,642

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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