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, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended								11 Months Ended	12 Months Ended			12 Months Ended		1 Months Ended	3 Months Ended							11 Months Ended	12 Months Ended	1 Months Ended	3 Months Ended							11 Months Ended	12 Months Ended	1 Months Ended	9 Months Ended	11 Months Ended	12 Months Ended				12 Months Ended										1 Months Ended	11 Months Ended	12 Months Ended			1 Months Ended	11 Months Ended	12 Months Ended
	Apr. 30, 2010	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Mar. 31, 2013	Mar. 31, 2012	May 05, 2011	Mar. 31, 2013 Senior secured note [Member]	Mar. 31, 2012 Senior secured note [Member]	Apr. 30, 2010 Restatement Adjustment [Member]	Dec. 31, 2012 Restatement Adjustment [Member]	Sep. 30, 2012 Restatement Adjustment [Member]	Jun. 30, 2012 Restatement Adjustment [Member]	Mar. 31, 2012 Restatement Adjustment [Member]	Dec. 31, 2011 Restatement Adjustment [Member]	Sep. 30, 2011 Restatement Adjustment [Member]	Jun. 30, 2011 Restatement Adjustment [Member]	Mar. 31, 2011 Restatement Adjustment [Member]	Mar. 31, 2012 Restatement Adjustment [Member]	Apr. 30, 2010 Scenario, Previously Reported [Member]	Dec. 31, 2012 Scenario, Previously Reported [Member]	Sep. 30, 2012 Scenario, Previously Reported [Member]	Jun. 30, 2012 Scenario, Previously Reported [Member]	Mar. 31, 2012 Scenario, Previously Reported [Member]	Dec. 31, 2011 Scenario, Previously Reported [Member]	Sep. 30, 2011 Scenario, Previously Reported [Member]	Jun. 30, 2011 Scenario, Previously Reported [Member]	Mar. 31, 2011 Scenario, Previously Reported [Member]	Mar. 31, 2012 Scenario, Previously Reported [Member]	Apr. 30, 2010 Predecessor [Member]	Dec. 31, 2012 Successor [Member]	Mar. 31, 2011 Successor [Member]	Mar. 31, 2013 Successor [Member]	Mar. 31, 2012 Successor [Member]	Apr. 30, 2010 Group of investors and other private equity firms [Member]	Apr. 30, 2010 Group of investors and other private equity firms [Member] Thermon Holding Corp. [Member] Predecessor [Member]	Mar. 31, 2013 Land Improvements [Member] Minimum [Member]	Mar. 31, 2013 Land Improvements [Member] Maximum [Member]	Mar. 31, 2013 Building and Building Improvements [Member] Minimum [Member]	Mar. 31, 2013 Building and Building Improvements [Member] Maximum [Member]	Mar. 31, 2013 Machinery and equipment [Member] Minimum [Member]	Mar. 31, 2013 Machinery and equipment [Member] Maximum [Member]	Mar. 31, 2013 Furniture and Fixtures [Member] Minimum [Member]	Mar. 31, 2013 Furniture and Fixtures [Member] Maximum [Member]	Mar. 31, 2013 Software Development [Member] Minimum [Member]	Mar. 31, 2013 Software Development [Member] Maximum [Member]	Apr. 30, 2010 Allowance for Doubtful Accounts [Member] Predecessor [Member]	Mar. 31, 2011 Allowance for Doubtful Accounts [Member] Successor [Member]	Mar. 31, 2013 Allowance for Doubtful Accounts [Member] Successor [Member]	Mar. 31, 2012 Allowance for Doubtful Accounts [Member] Successor [Member]	May 02, 2010 Allowance for Doubtful Accounts [Member] Successor [Member]	Apr. 30, 2010 Inventory Valuation Reserve [Member] Predecessor [Member]	Mar. 31, 2011 Inventory Valuation Reserve [Member] Successor [Member]	Mar. 31, 2013 Inventory Valuation Reserve [Member] Successor [Member]	Mar. 31, 2012 Inventory Valuation Reserve [Member] Successor [Member]
Business Acquisition [Line Items]
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
Shares, Issued													4,575,098
Proceeds from Issuance of Common Stock												48,600
Sales	13,183	71,667	76,830	67,849	67,690	69,568	69,280	68,399	65,076	227,880		272,323				120	80	491	477	531	443	376	458	2,135	1,808	13,063	76,750	67,358	67,213	69,037	68,837	68,023	64,618	225,745	270,515	13,183	284,036	227,880	284,036	272,323
Cost of Goods Sold	6,567		41,879	35,210	34,351	35,084	35,589	36,448	33,087	132,395		140,208														6,447	41,799	34,719	33,874	34,553	35,146	36,072	32,629	130,260	138,400
Gross Profit	6,616	31,903	34,951	32,639	33,339	34,484	33,691	31,951	31,989	95,485		132,115														6,616	34,951	32,639	33,339	34,484	33,691	31,951	31,989	95,485	132,115	6,616		95,485	132,832	132,115
Gross profit as a percentage of revenue	50.20%		45.50%	48.10%	49.30%	49.60%	48.60%	46.70%	49.20%	41.90%		48.50%														50.60%	45.50%	48.50%	49.60%	50.00%	48.90%	47.00%	49.50%	42.30%	48.80%
Net cash provided by (used in) operations												3,112							1,243						(2,181)										5,293	(6,402)		38,962	41,370	3,112
Net cash (used in) provided by financing activities												(22,671)													2,181										(24,852)	(19,385)		326,316	(12,189)	(22,671)
Non-U.S.	18,509									16,271	36,358	33,912																								(1,049)		5,114	36,599	33,978
Disclosure on Geographic Areas, Long-Lived Assets in Foreign Countries		54.00%				54.00%					54.00%	54.00%
Entity Wide Disclosure On Geographic Areas, Revenue From External Customers Attributed To Foreign Countries, Percentage	70.00%									62.00%	71.00%	66.00%
Accounts receivable, allowance for doubtful accounts (in dollars)		1,141				1,434					1,141	1,434																											1,141
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period																																																					1,835		1,434	1,487	1,782	1,172	1,198	1,094	1,705
Reductions to expense																																																					(53)		(21)			42	507	179
Additions charged to expense																																																						792		307					(594)
Write-off of uncollectible accounts																																																					0	(1,087)	(272)	(360)		(16)		(197)	(17)
Balance, end of period																																																					1,782	1,487		1,434	1,782	1,198	1,705	1,076	1,094
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	2,586									3,948	3,321	4,127		871	3,096
Research and Development Expense	$ 1,676									$ 1,770	$ 2,832	$ 881