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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Line Items] |  |  |
Undistributed earnings of non-U.S. subsidiaries | $ 683,000,000 us-gaap_UndistributedEarningsOfForeignSubsidiaries | $ 597,000,000 us-gaap_UndistributedEarningsOfForeignSubsidiaries |
Foreign earnings repatriated | 6,500,000 us-gaap_ForeignEarningsRepatriated | 11,700,000 us-gaap_ForeignEarningsRepatriated | 0 us-gaap_ForeignEarningsRepatriated
Incremental income tax expense | 200,000 iex_ForeignEarningsRepatriatedIncomeTaxExpenseBenefit | 900,000 iex_ForeignEarningsRepatriatedIncomeTaxExpenseBenefit |
Accrued interest related to uncertain tax positions | 700,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued | 500,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued | 700,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued
Accrued penalties related to uncertain tax positions | 300,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued | 200,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued | 500,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued
Unrecognized tax benefits that would affect our effective tax rate | 2,900,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | 4,500,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | 5,800,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Unrecognized tax benefits possible change, estimated range, lower bound | 0 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeLowerBound |  |
Unrecognized tax benefits possible change, estimated range, upper bound | 2,100,000 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound |  |
Loss carry forwards for U.S. federal | 7,100,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic | 9,400,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic |
Loss carry forwards for non-U.S. | 5,000,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign | 7,000,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign |
Loss carry forwards, subject to expiration amount | 1,900,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration |  |
Loss carry forwards, not subject to expiration amount | 2,200,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration |  |
Foreign capital loss carry forward | 1,000,000 us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings | 1,000,000 us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings |
Deferred tax assets, capital loss carry forwards | 200,000 us-gaap_DeferredTaxAssetsCapitalLossCarryforwards | 200,000 us-gaap_DeferredTaxAssetsCapitalLossCarryforwards |
Operating loss and credit carry forwards | 23,700,000 us-gaap_OperatingLossCarryforwards | 22,400,000 us-gaap_OperatingLossCarryforwards |
Operating loss carry forwards, valuation allowance | $ 800,000 us-gaap_OperatingLossCarryforwardsValuationAllowance | $ 700,000 us-gaap_OperatingLossCarryforwardsValuationAllowance |
Federal | Minimum |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carry forwards, expiration dates | Dec. 31, 2018 |  |
Federal | Maximum |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carry forwards, expiration dates | Dec. 31, 2031 |  |
State and Local Jurisdiction | Minimum |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carry forwards, expiration dates | Dec. 31, 2022 |  |
State and Local Jurisdiction | Maximum |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carry forwards, expiration dates | Dec. 31, 2034 |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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