Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	[1]
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (10,689)	$ 4,309	$ (98,132)	$ 13,296
Other comprehensive (loss) income:
Unrealized gain (loss) on available-for-sale securities, net of income tax expense of $0, $13, $6 and $6	0	40	6	37
(Loss) gain on derivative securities, effective portion, net of income tax expense (benefit) of $0, $(6), $(139) and $26	0	(18)	(223)	138
Foreign currency translation, net of income tax (benefit) expense of $(37), $7, $(101) and $7	(177)	82	23	(373)
Net other comprehensive income (loss) during period	(177)	104	(194)	(198)
Comprehensive (loss) income	$ (10,866)	$ 4,413	$ (98,326)	$ 13,098

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