Supplemental Balance Sheets and Statements of Operations Detail (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Accrued expenses:
Salaries, wages, and related employee costs	$ 23,596	$ 20,971
Deferred acquisition payments	19,153	22,135
Vacation	10,570	12,582
Interest	15,735	15,628
Restructuring	6,217	13,871
Other	1,197	7,991
Total accrued expenses	76,468	93,178
Other non-current obligations:
Deferred acquisition payments	0	17,585
Pension plans	32,852	30,355
Employee separation liability	15,419	14,322
Deferred construction costs	0	2,476
Restructuring	0	205
Other	7,593	4,079
Total other non-current obligations	55,864	69,022
Other (income) expense, net:
Net foreign exchange (gains) losses	(304)	(28)	919
Miscellaneous non-product income	0	(465)	0
Other	(2,377)	(1,802)	46
Total other (income) expense, net	$ (2,681)	$ (2,295)	$ 965