Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	[1]
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (8,575)	$ 8,059	[2]
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities, net of income tax expense (benefit) of $5 and $(18)	15	(37)
(Loss) gain on derivative securities, effective portion, net of income tax (benefit) expense of $(33) and $28	(100)	144
Foreign currency translation, net of income tax benefit of $55 and $3	128	(117)
Net other comprehensive income (loss) during period	43	(10)
Comprehensive (loss) income	$ (8,532)	$ 8,049

[1]

[2] May not add due to rounding.