Fair Value Of Financial Assets And Liabilities (Assets And Liabilities Measured At Fair Value On A Nonrecurring Basis) (Details) (USD $)	3 Months Ended		9 Months Ended								9 Months Ended				9 Months Ended		9 Months Ended				9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2011 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2011 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2011 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2011 Long Lived Assets Held and Used [Member]	Dec. 31, 2011 Long Lived Assets Held and Used [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2011 Long Lived Assets Held and Used [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2011 Long Lived Assets Held and Used [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2011 Liquid CO2 Plant [Member]	Sep. 30, 2011 Liquid CO2 Plant [Member]	Dec. 31, 2012 Other intangible assets [Member]	Dec. 31, 2012 Other intangible assets [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Other intangible assets [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Other intangible assets [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Hospital Piping Business [Member]	Jun. 30, 2012 Hospital Piping Business [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Nonrecurring	$ 0	$ 0	$ 0	$ 0
Intangible Assets, Fair Value Disclosure																		0	0	535,000
Property, Plant, and Equipment, Fair Value Disclosure												0	0	8,765,000
Total assets measured at fair value on a recurring basis					0	0	0	0	535,000	8,765,000
Asset impairment charges	0	0	1,729,000	2,500,000							2,500,000				2,500,000		1,729,000
Impairment of Intangible Assets (Excluding Goodwill)																					1,700,000
Assets, Fair Value Disclosure, Nonrecurring																$ 8,800,000						$ 500,000