Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Accounting Policy Information (Details)

v2.4.0.8
Basis of Presentation and Accounting Policy Information (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2012
Scenario, Previously Reported
Sep. 30, 2013
Scenario, Previously Reported
Sep. 30, 2012
Restatement Adjustment
Sep. 30, 2012
Restatement Adjustment
Apr. 30, 2010
Thermon Holding Corp.
Sep. 30, 2013
Thermon Holding Corp.
Scenario, Previously Reported
Apr. 30, 2010
Thermon Holding Corp.
Group of investors and other private equity firms
Apr. 30, 2010
Thermon Holding Corp.
Group of investors and other private equity firms
Predecessor
Business Acquisition [Line Items]                        
Sales $ 72,783 $ 67,849 $ 138,383 $ 135,539 $ 67,358 $ 134,571 $ 491 $ 968        
Number of other private equity firms                     2  
Purchase price to acquire the controlling interest                 210,000     321,500
Cost of selling controlling interest                 129,252      
Net cash used in operating activities     (17,052) (13,825)                
Cost of Goods Sold   35,210   69,561 34,719 68,593            
Gross Profit $ 35,355 $ 32,639 $ 66,369 $ 65,978 $ 32,639 $ 65,978            
Gross profit as a percentage of revenue   48.10%   48.70% 48.50%         49.00%