Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Details)

v2.4.0.8
Long-Term Debt (Details) (USD $)
6 Months Ended 0 Months Ended 0 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Mar. 31, 2014
May 20, 2013
9.500% Senior Secured Notes, due May 2017
Sep. 30, 2014
9.500% Senior Secured Notes, due May 2017
Sep. 30, 2014
Loans Payable
Mar. 31, 2014
Loans Payable
Jun. 11, 2014
Revolving credit facility
Jun. 10, 2014
Revolving credit facility
Sep. 30, 2014
Revolving credit facility
Jun. 11, 2014
Revolving credit facility
Sep. 30, 2014
Revolving credit facility
Thermon Industries, Inc.
Mar. 31, 2013
London Interbank Offered Rate (LIBOR)
Mar. 31, 2013
Canadian Deposit Offer Rate
Mar. 31, 2013
Minimum
Base Rate
Mar. 31, 2013
Maximum
Base Rate
Sep. 30, 2014
Through March 31, 2016
Loans Payable
Sep. 30, 2014
Last Two Years Of Loan
Loans Payable
Sep. 30, 2014
Due in April 2018
Loans Payable
Debt Instrument [Line Items]                                      
Variable Rate Term Loan, due April 2019       $ 118,145,000   $ 114,750,000 $ 121,500,000                        
Less current portion (13,500,000)   (13,500,000)                                
Long-term debt, noncurrent 101,250,000   108,000,000                                
Maximum borrowing capacity                   60,000,000                  
Debt instrument, interest rate, decrease (percentage)               0.25%                      
Line of credit facility, decrease in periodic payment (as a percentage)                     0.05%                
Maximum leverage ratio               2.75 2.25                    
Annual commitment fee on unutilized commitments (as a percent)                   0.35%                  
Line of credit facility, commitment fee percentage                   0.125%                  
Outstanding borrowings                   0                  
Capacity available under credit facility                       59,137,000              
Interest rate at period end (as a percent)                       2.4375%              
Debt Instrument, interest rate, stated percentage         2.4375% 2.4375%                          
Repayments of Notes Payable                                 1,125,000 1,688,000 40,500,000
Premiums paid on redemptions 0 (15,485,000)   15,485,000                              
Deferred debt amortization       4,010,000                              
Issuance costs associated with revolving line of credit and long term debt $ 290,000                                    
Interest rate in addition to LIBOR rate                         1.00% 1.00% 0.50% 1.00%