2.4.0.82410401 - Disclosure - Commitments and Contingencies (Details)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$I2014Q1http://www.sec.gov/CIK0001489096instant2013-06-30T00:00:000001-01-01T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$I2013Q4http://www.sec.gov/CIK0001489096instant2013-03-31T00:00:000001-01-01T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDtruefalse$D2014Q1YTD_us-gaap_LossContingenciesByNatureOfContingencyAxis_thr_TaxDisputeWithCanadaRevenueAgencyMemberhttp://www.sec.gov/CIK0001489096duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseNotice of Tax Dispute with the Canada Revenue Agencyus-gaap_LossContingenciesByNatureOfContingencyAxisxbrldihttp://xbrl.org/2006/xbrldithr_TaxDisputeWithCanadaRevenueAgencyMemberus-gaap_LossContingenciesByNatureOfContingencyAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_LossContingenciesLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Commitments and Contingencies2false 4us-gaap_GuaranteeObligationsMaximumExposureus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1427600014276USD$falsetruefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryMaximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 false2Totaled arrangements under letter of credit guarantees and performance bonds securing performance obligations3false 4thr_GuaranteeObligationsSecuredByCashDepositsthr_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse16910001691falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of guarantee obligations secured by cash deposits.No definition available.false2Guarantee obligations secured by cash deposits4false 4thr_GuaranteeObligationsRepresentedByReductionOfAvailableAmountOfLinesOfCreditthr_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1258600012586falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of guarantee obligations represented by a reduction of the available amount of the entity's revolving lines of credit.No definition available.false2Guarantee obligations represented by a reduction of the available amount of the company's short term and long term revolving lines of credit5false 4thr_GuaranteeObligationsCashDepositsPledgedAsCollateralthr_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse16910001691falsefalsefalse2truefalsefalse19780001978falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the carrying amount, as of the balance sheet date, of cash equivalent securities held for guarantee obligations.No definition available.false2Cash deposits pledged as collateral on performance bonds and letters of credit6false 4thr_LossContingencyTaxDueRequestedByRevenueAgencythr_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse30000003000USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresents the tax due that is requested by the revenue agency.No definition available.false2Tax due that is requested by the AgencyfalseCommitments and Contingencies (Details) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.thermon.com/role/CommitmentsAndContingenciesDetails36