Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Pro Forma Information (Details)

v3.8.0.1
Acquisitions - Pro Forma Information (Details) - Thermon Heating Systems Inc. - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Business Acquisition [Line Items]        
Revenues $ 99,281 $ 83,779 $ 245,878 $ 241,890
Net income available to Thermon Group Holdings, Inc. (loss) $ 362 $ 4,550 $ (294) $ (1,716)
Basic (in dollars per share) $ 0.01 $ 0.14 $ (0.01) $ (0.05)
Diluted (in dollars per share) $ 0.01 $ 0.14 $ (0.01) $ (0.05)