Airedale Facility Fire (Details) (Loss by Fire [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014
Loss by Fire [Member]
Unusual or Infrequent Item [Line Items]
Costs not covered by insurance	$ 1.0
Advance received from insurance provider	37.6
Inventory write off	4.7
Equipment write off	1.4
Other costs attributable to fire	11.9
Aggregate losses and costs	18.0
Company paid reconstruction costs	1.0
Estimated total cost of reconstruction	45.0
Liability to rebuild damaged facility	45.0
Current liability to rebuild damaged facility	37.0
Noncurrent liability to rebuild damaged facility	8.0
Insurance receivable	25.4
Insurance receivable current	18.4
Insurance receivable noncurrent	$ 7.0