Investment in Affiliate	12 Months Ended
Investment in Affiliate	Mar. 31, 2013
Investment in Affiliate [Abstract]
Investment in Affiliate	Note 11: Investment in Affiliate The Company's investment in its non-consolidated affiliate is accounted for under the equity method. The Company has a 50 percent ownership of Nikkei Heat Exchanger Company, Ltd. ("NEX"). At March 31, 2013 and 2012, the Company had $3.3 million and $3.7 million, respectively, recorded as an asset related to this investment. At March 31, 2013, the investment in NEX is equal to the Company's investment in the underlying assets. The results of operations for NEX are reported in the consolidated financial statements using a one-month reporting delay. Equity in earnings from non-consolidated affiliates is reported within other income and expense in the consolidated statements of operations. The Company's share of NEX's earnings (loss) for the years ended March 31, 2013, 2012 and 2011 were $0.3 million, ($0.1) million and $0.5 million, respectively.

The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group.

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