Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Expense (Details) - Thermon Holding Corp

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Stock-Based Compensation Expense (Details) - Thermon Holding Corp (Stock Options, USD $)
In Thousands, unless otherwise specified
3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Minimum
Jun. 30, 2012
Maximum
May 31, 2011
Restricted Stock and Stock Option Plan
Jun. 30, 2012
Thermon Holding Corp.
Jun. 30, 2011
Thermon Holding Corp.
Jun. 30, 2012
Thermon Holding Corp.
Minimum
Jun. 30, 2012
Thermon Holding Corp.
Maximum
May 31, 2011
Thermon Holding Corp.
Restricted Stock and Stock Option Plan
Stock-Based Compensation Expense                    
Stock compensation expense $ 58 $ 6,341       $ 58 $ 6,341      
Stock compensation expense associated with the acceleration of the pre-IPO options         $ 6,310         $ 6,310
Vesting period     5 years 10 years       5 years 10 years  
Expiration term 10 years         10 years