Acquisition of OceanGeo - Pro Forma Income Statement Information (Details) $ / shares in Units, $ in Thousands		12 Months Ended
Feb. 04, 2016	Dec. 31, 2014 USD ($) $ / shares	Dec. 31, 2013 USD ($) $ / shares
Business Combinations [Abstract]
Net revenues		$ 518,742	$ 580,834
Loss from operations		(114,346)	(19,300)
Net loss		(126,492)	(262,974)
Net loss attributable to ION		$ (127,226)	$ (268,330)
Basic and diluted net loss per common share (usd per share) \| $ / shares		$ (11.70)	$ (25.39)
Subsequent event [Member]
Subsequent Event [Line Items]
Reverse stock split ratio of one share	0.066667

Business Acquisition, Pro Forma Earnings Per Share, Basic and Diluted

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Business Acquisition, Pro Forma Net Income (Loss) Attributable to Parent

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Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6525746

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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