Income Taxes - Narrative (Details) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance	$ 20,000,000	$ 20,000,000	$ 6,100,000
Period of cumulative loss for determination of full valuation allowance	3 years
Unremitted foreign earnings	80,800,000
Unrecognized Tax Benefits	5,691,000	5,395,000	6,321,000	5,156,000
Unrecognized income tax benefits that would affect the Company's effective income tax rate, if recognized	900,000
Estimated decrease in total unrecognized tax benefit related to uncertain tax positions	400,000
Accrued interest and penalties	400,000	300,000
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	404,800,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	449,800,000
Operating loss carryforwards of foreign subsidiaries expiring in one year, if unused	3,400,000
Operating loss carryforwards, expiration period	1 year
Foreign subsidiaries in Finland, Italy, Portugal and Sweden
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	78,300,000
Operating loss carryforwards of foreign subsidiaries expiring in one year, if unused	3,600,000
Operating loss carryforwards, expiration period	1 year
Valuation Allowance for Deferred Tax Assets
Operating Loss Carryforwards [Line Items]
Valuation allowance and reserves	$ 189,276,000	$ 169,270,000	$ 149,306,000	$ 143,216,000