Amortization Period Of Unamortized Debt Issuance Expense

No definition available.

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- Definition

Debt Instrument, Number Of Days Prior To Maturity Date Debt May Mature

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Percentage Of Equity Interest Securing Obligations Of Borrowers

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Fixed charge coverage ratio.

+ References

No definition available.

+ Details

Name:	io_FixedChargeCoverageRatio
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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Leverage ratio .

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Line of Credit Facility, Potential Increase To Borrowing Capacity

+ References

No definition available.

+ Details

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Namespace Prefix:	io_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line Of Credit Facility, Sublimit For Issuance Of Standby Letters Of Credit

+ References

No definition available.

+ Details

Name:	io_LineOfCreditFacilitySublimitForIssuanceOfStandbyLettersOfCredit
Namespace Prefix:	io_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long term debt and capital lease obligations both current and noncurrent.

+ References

No definition available.

+ Details

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Namespace Prefix:	io_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	io_LongTermDebtAndInterestRateCapsTextualAbstract
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Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow for cost incurred in the modification of term of existing debt agreement in order for the entity to achieve some advantage.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Long-term Debt Narrative (Details) (USD $)								0 Months Ended					0 Months Ended			0 Months Ended
Long-term Debt Narrative (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Senior Notes [Member]	Dec. 31, 2013 Senior Notes [Member]	May 13, 2013 Senior Notes [Member]	Sep. 30, 2014 Revolving Credit Facility [Member]	Dec. 31, 2013 Revolving Credit Facility [Member]	Aug. 22, 2014 Line of Credit [Member] PNC Bank, National Association (PNC) [Member]	Sep. 30, 2014 Line of Credit [Member] PNC Bank, National Association (PNC) [Member]	Aug. 22, 2014 Line of Credit [Member] PNC Bank, National Association (PNC) [Member]	Aug. 22, 2014 Line of Credit [Member] China Merchants Bank Co. (CMB) [Member]	Aug. 22, 2014 Line of Credit [Member] Uncommitted Term Facility [Member] PNC Bank, National Association (PNC) [Member]	Aug. 22, 2014 Line of Credit [Member] Revolving Credit Facility [Member] PNC Bank, National Association (PNC) [Member]	Aug. 22, 2014 Line of Credit [Member] Revolving Credit Facility [Member] PNC Bank, National Association (PNC) [Member]	Aug. 22, 2014 Line of Credit [Member] Letter of Credit [Member] PNC Bank, National Association (PNC) [Member]	Aug. 22, 2014 Federal Funds Effective Swap Rate [Member] Line of Credit [Member] Revolving Credit Facility [Member] PNC Bank, National Association (PNC) [Member]	Aug. 22, 2014 LIBOR [Member] Line of Credit [Member] Revolving Credit Facility [Member] PNC Bank, National Association (PNC) [Member]	Aug. 22, 2014 Minimum [Member] Line of Credit [Member] PNC Bank, National Association (PNC) [Member]	Aug. 22, 2014 Maximum [Member] Line of Credit [Member] PNC Bank, National Association (PNC) [Member]
Long-term Debt and Interest Rate Caps (Textual) [Abstract]
Principal amount of debt					$ 175,000,000
Stated rate on debt					8.125%
Revolving line of credit, maximum capacity										175,000,000		50,000,000		125,000,000
Sublimit for issuance of standby letters of credit															15,000,000
Outstanding debt									0
Current borrowing capacity														80,000,000
Potential increase to borrowing capacity														45,000,000
Carrying value of long-term debt	185,484,000	220,152,000	175,000,000	175,000,000		0	35,000,000
Debt Instrument, Basis Spread on Variable Rate																0.50%	1.00%
Debt Instrument, Number Of Days Prior To Maturity Date Debt May Mature													90 days
Debt Instrument, Percentage Of Equity Interest Securing Obligations Of Borrowers								65.00%
Fixed charge coverage ratio																		1.1
Leverage ratio																			3.0
Payments of debt restructuring costs								1,900,000
Amortization period of unamortized debt issuance expense								3 years 6 months
Unamortized debt issuance expense											$ 300,000