Cost Reduction Plans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Mar. 31, 2015
2014 Cost Reduction Plan
Total	$ 248,011		$ 248,011		$ 243,205
Cost reduction plan total charges incurred to date	6,900		6,900		$ 6,100
Impairment of long-lived assets and related purchase commitments			2,213	$ 2,736
Restructuring charges	$ 617	$ 309	$ 803	$ 912