Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Foreign Exchange Contracts (Details)

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Fair Value Measurements - Foreign Exchange Contracts (Details) (Thermon Holding Corp., USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Maximum term of forward contracts 30 days    
Net Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments $ 15 $ 17  
Foreign Exchange Forward Contracts
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreign exchange contract forwards, assets 31   35
Foreign exchange contract forwards, liabilities 82   93
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net $ 33 $ 165