Thermon Group Holdings, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies (Details)

Organization and Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended				0 Months Ended	12 Months Ended		12 Months Ended																0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Apr. 30, 2010	May 20, 2013 Senior secured note [Member]	Mar. 31, 2013 Senior secured note [Member]	Apr. 30, 2010 Group of investors and other private equity firms [Member]	Mar. 31, 2014 Land Improvements [Member] Minimum [Member]	Mar. 31, 2014 Land Improvements [Member] Maximum [Member]	Mar. 31, 2014 Building and Building Improvements [Member] Minimum [Member]	Mar. 31, 2014 Building and Building Improvements [Member] Maximum [Member]	Mar. 31, 2014 Machinery and equipment [Member] Minimum [Member]	Mar. 31, 2014 Machinery and equipment [Member] Maximum [Member]	Mar. 31, 2014 Furniture and Fixtures [Member] Minimum [Member]	Mar. 31, 2014 Furniture and Fixtures [Member] Maximum [Member]	Mar. 31, 2014 Software Development [Member] Minimum [Member]	Mar. 31, 2014 Software Development [Member] Maximum [Member]	Mar. 31, 2014 Allowance for Doubtful Accounts [Member]	Mar. 31, 2013 Allowance for Doubtful Accounts [Member]	Mar. 31, 2012 Allowance for Doubtful Accounts [Member]	Mar. 31, 2014 Inventory Valuation Reserve [Member]	Mar. 31, 2013 Inventory Valuation Reserve [Member]	Mar. 31, 2012 Inventory Valuation Reserve [Member]	Apr. 30, 2010 Predecessor [Member] Group of investors and other private equity firms [Member] Thermon Holding Corp. [Member]
Business Acquisition [Line Items]
Number of other private equity firms															2
Purchase price to acquire the controlling interest																																$ 321,500
Cost of selling controlling interest												129,252
Consideration transferred, liabilities incurred																																210,000
Sales					71,667	76,830	67,849	67,690	277,323	284,036	272,323
Gross Profit	32,745	36,056	35,355	31,014	31,903	34,951	32,639	33,339	135,170	132,832	132,115
Net cash provided by (used in) operations									46,114	41,370	3,112
Non-U.S.									39,078	36,358	33,912
Disclosure on Geographic Areas, Long-Lived Assets in Foreign Countries	55.00%				54.00%				55.00%	54.00%
Entity Wide Disclosure On Geographic Areas, Revenue From External Customers Attributed To Foreign Countries, Percentage									67.00%	71.00%	66.00%
Accounts receivable, allowance for doubtful accounts (in dollars)	751				1,141				751	1,141
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period																												1,487			1,705
Reductions to expense																										(175)					(17)
Additions charged to expense																											(21)	307	(129)	179	(594)
Write-off of uncollectible accounts																										(215)	(272)	(360)	(54)	(197)
Property, Plant and Equipment, Estimated Useful Lives																15 years	20 years	10 years	40 years	3 years	25 years	3 years	10 years	5 years	7 years
Amortization of Deferred Charges									4,572	3,321	4,127		4,010	871
Research and Development Expense									$ 3,008	$ 2,832	$ 881