Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (5,110)	$ (78,868)	$ (2,926)	$ (87,443)
Other comprehensive income (loss):
Unrealized (loss) gain on available-for-sale securities, net of income tax expense of $0, $1, $0 and $6	0	(9)	0	6
Loss on derivative securities, effective portion, net of income tax expense (benefit) of $0, $(106), $0 and $(139)	0	(123)	0	(223)
Foreign currency translation, net of income tax benefit of $(15), $(9), ($47) and $(64)	353	72	(22)	200
Net other comprehensive income (loss) during period	353	(60)	(22)	(17)
Comprehensive loss	$ (4,757)	$ (78,928)	$ (2,948)	$ (87,460)