Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement of Other Comprehensive Income [Abstract]
Net income (loss)	$ 62,826	$ 24,566	$ (36,838)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	(2,756)	28	266
Equity interest in INOVA Geophysical’s other comprehensive income (loss)	1,003	315	(103)
Unrealized income (loss) on available-for-sale securities	425	(730)	0
Other changes in other comprehensive (loss)	123	(220)	(60)
Other changes in other comprehensive (loss)	4,307	(663)	(429)
Other comprehensive income (loss), net of taxes	67,133	23,903	(37,267)
Comprehensive income attributable to noncontrolling interest	489	208	0
Comprehensive net income (loss) attributable to ION	$ 67,622	$ 24,111	$ (37,267)