Fair Value Of Financial Assets And Liabilities (Assets And Liabilities Measured At Fair Value On A Nonrecurring Basis) (Details) (USD $)	12 Months Ended											12 Months Ended				12 Months Ended					1 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2013 Fair Value, Measurements, Nonrecurring [Member]	Mar. 31, 2012 Fair Value, Measurements, Nonrecurring [Member]	Mar. 31, 2013 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Mar. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Mar. 31, 2013 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Mar. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Mar. 31, 2013 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2013 Other intangible assets [Member]	Mar. 31, 2013 Other intangible assets [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Mar. 31, 2013 Other intangible assets [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Mar. 31, 2013 Other intangible assets [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2013 Hospital Piping Business [Member]	Mar. 31, 2012 Long Lived Assets Held and Used [Member]	Mar. 31, 2012 Long Lived Assets Held and Used [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Mar. 31, 2012 Long Lived Assets Held and Used [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Mar. 31, 2012 Long Lived Assets Held and Used [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 30, 2011 Liquid CO2 Plant [Member]	Mar. 31, 2012 Air Separation Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Nonrecurring				$ 0	$ 0
Intangible Assets, Fair Value Disclosure													0	0	535,000
Asset impairment charges	1,729,000	4,250,000	0									1,729,000					4,250,000				2,500,000	1,800,000
Assets, Fair Value Disclosure						0	0	0	0	535,000	9,165,000
Property, Plant, and Equipment, Fair Value Disclosure																		0	0	9,165,000
Assets, Fair Value Disclosure, Nonrecurring																					8,800,000	400,000
Impairment of Intangible Assets (Excluding Goodwill)																$ 1,700,000