Restructuring Costs Restructuring costs (Narrative) (Details) (USD $)	3 Months Ended				6 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Restructuring Costs [Line Items]
Restructuring costs	$ 3,350,000	[1]	$ 1,308,000	[1]	$ 3,350,000	[1]	$ 1,308,000	[1]
Restructuring liability	900,000				900,000
Facility Consolidation [Member]
Restructuring Costs [Line Items]
Restructuring costs			800,000
Other Restructuring [Member]
Restructuring Costs [Line Items]
Restructuring costs			$ 500,000

[1] Restructuring costs are excluded from segment operating income, but are included in consolidated operating income in the consolidated statements of income and comprehensive income.