Financial Instruments	3 Months Ended
Jun. 30, 2012
Financial Instruments [Abstract]
Financial Instruments [Text Block]	Note 13: Financial Instruments Concentrations of Credit Risk: 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. At June 30, 2012 and March 31, 2012, approximately 52 percent and 54 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 all influenced by many of the same market and general economic factors. To reduce credit risk, the Company performs periodic customer credit evaluations and actively monitors their financial condition and developing business news. The Company does not generally require collateral or advanced payments from its customers, but does so 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 have been well below one percent of outstanding trade receivable balances for the presented periods. See Note 18 for further discussion on market, credit and counterparty risks. Inter-Company Loans Denominated in Foreign Currencies: The Company has certain foreign-denominated inter-company loans that are sensitive to foreign exchange rates. At June 30, 2012, the Company has inter-company loans outstanding of $12,000 between two loans to its wholly owned subsidiary, Modine Thermal Systems (Changzhou) Co. Ltd. (Changzhou, China), with various maturity dates through July 2013. These inter-company loans are sensitive to movement in foreign exchange rates, and the Company does not have any derivative instruments to hedge this exposure at June 30, 2012.

Note 13: Financial Instruments

Concentrations of Credit Risk: 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. At June 30, 2012 and March 31, 2012, approximately 52 percent and 54 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 all influenced by many of the same market and general economic factors. To reduce credit risk, the Company performs periodic customer credit evaluations and actively monitors their financial condition and developing business news. The Company does not generally require collateral or advanced payments from its customers, but does so 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 have been well below one percent of outstanding trade receivable balances for the presented periods. See Note 18 for further discussion on market, credit and counterparty risks.

Inter-Company Loans Denominated in Foreign Currencies: The Company has certain foreign-denominated inter-company loans that are sensitive to foreign exchange rates. At June 30, 2012, the Company has inter-company loans outstanding of $12,000 between two loans to its wholly owned subsidiary, Modine Thermal Systems (Changzhou) Co. Ltd. (Changzhou, China), with various maturity dates through July 2013. These inter-company loans are sensitive to movement in foreign exchange rates, and the Company does not have any derivative instruments to hedge this exposure at June 30, 2012.