Supplemental Balance Sheets and Statements of Operations - Other Expenses and Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Accrued expenses:
Salaries, wages, and related employee costs	$ 29,589	$ 20,708
Interest	15,603	15,683
Restructuring	984	946
Accrued Vacation, Current	7,524	7,892
Other	4,052	5,091
Total accrued expenses	57,752	50,320
Other non-current obligations:
Pension plans	34,674	35,156
Employee separation liability	8,685	9,352
Deferred Compensation Liability, Classified, Noncurrent	1,774	1,544
Purchase Obligation	898	1,349
Restructuring	15	30
Option Valuation Noncurrent	9,900	20,600
Long-Term Service Contracts Noncurrent	339	2,343
Other	3,846	4,518
Total other non-current obligations	60,131	74,892
Non-operating (income) expense, net:
Net foreign exchange (gains) losses	(3,758)	(3,036)	$ (4,249)
Insurance proceeds	(423)	0	0
Gain on early extinguishment of debt	0	0	(1,003)
Offering memorandum fees	0	0	1,142
Other	946	(688)	(28)
Nonoperating Income (Expense)	$ 5,127	$ 2,348	$ 4,082