Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 5,013	$ 1,914	$ (28,036)	$ (58,385)
Other comprehensive loss, net of taxes, as appropriate:
Foreign currency translation adjustments	1,033	(1,083)	2,749	(5,282)
Comprehensive net income (loss)	6,046	831	(25,287)	(63,667)
Comprehensive (income) attributable to noncontrolling interest	(78)	(215)	(812)	(272)
Comprehensive net income (loss) attributable to ION	$ 5,968	$ 616	$ (26,099)	$ (63,939)