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Concentrations of credit risk/financial instruments | 12 Months Ended
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Mar. 31, 2012
Concentrations of credit risk/financial instruments [Abstract] |
Concentrations of credit risk/financial instruments | Note 17: Concentrations of credit risk/financial instruments The Company invests excess cash in investment quality, short-term liquid debt instruments. Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of accounts receivable. The Company sells a broad range of products that provide thermal solutions to a diverse group of customers operating throughout the world. In fiscal 2012, no customer accounted for ten percent or more of the total Company sales, while in fiscal 2011 and 2010, one customer accounted for ten percent or more of total Company sales. Sales to the Company's top ten customers were approximately 61 percent, 58 percent and 57 percent of total annual sales in fiscal 2012, 2011 and 2010, respectively. At March 31, 2012, 2011 and 2010, approximately 54 percent, 48 percent and 47 percent, respectively, of the Company's trade accounts receivables were from the Company's top ten individual customers. These customers operate primarily in the automotive, truck and heavy equipment markets and are influenced by many of the same market and general economic factors. To reduce the credit risk, the Company performs periodic credit evaluations of each customer and actively monitors their financial condition and developing business news. Collateral or advanced payments are generally not required, but may be used in those cases where a substantial credit risk is identified. Credit losses to customers operating in the markets served by the Company have not been material. Total bad debt write-offs for the periods presented have been below one percent of outstanding trade receivable balances at respective year-ends. See Note 25 for further discussion on market, credit and counterparty risks. The Company has certain foreign-denominated long-term inter-company loans that are sensitive to foreign exchange rates. The Company has inter-company loans outstanding at March 31, 2012 as follows:
| · | $12,000 between two loans to its wholly owned subsidiary, Modine Thermal Systems (Changzhou) Co. Ltd. (Changzhou, China), with various maturity dates through July 2012; and
| · | $1,300 between two loans to its wholly owned subsidiary, Modine Thermal Systems Korea, with various maturity dates through April 2012.
These inter-company loans are sensitive to movement in foreign exchange rates, and the Company does not have any derivative instruments that hedge this exposure at March 31, 2012.

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 94-6 -Paragraph 21, 22, 24 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13537-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6442-108592 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13531-108611 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6327-108592 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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