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Derivative Instruments and Hedging Activities (Details Textual) (Interest Rate Swap)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Mortgage loan expiry date	Apr. 16, 2019
Mortgages
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Number of Interest rate swap agreements	2us-gaap_DerivativeNumberOfInstrumentsHeld / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestRateSwapMember
Mortgages | First Half of Mortgage
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Strike Rate	5.91%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestRateSwapMember / us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis = kvhi_FirstHalfOfMortgageMember
Mortgages | Second Half of Mortgage
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Strike Rate	6.07%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestRateSwapMember / us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis = kvhi_SecondHalfOfMortgageMember

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ 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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 3: 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

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- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959

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- Definition

Stated maturity date of the mortgage loan receivable on real estate, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 10

-Section S99

-Paragraph 6

-Subparagraph (SX 210.5-04.(c) Schedule IV)

-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 29

-Article 12



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule IV

-Article 5



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 310

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-29)

-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

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