Financial Instruments (Forward Contracts) (Details)	12 Months Ended
	Mar. 31, 2014 USD ($)	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Mar. 31, 2014 British Pounds Sterling Foreign Exchange Forward [Member] USD ($)	Mar. 31, 2014 British Pounds Sterling Foreign Exchange Forward [Member] GBP (£)	Mar. 31, 2014 Australian Dollar Foreign Exchange Forward [Member] USD ($)	Mar. 31, 2014 Australian Dollar Foreign Exchange Forward [Member] AUD	Mar. 31, 2014 Euro Foreign Exchange Forward [Member] USD ($)	Mar. 31, 2014 Euro Foreign Exchange Forward [Member] EUR (€)	Mar. 31, 2014 Czech Republic Koruna Foreign Exchange Forward [Member] USD ($)	Mar. 31, 2014 Czech Republic Koruna Foreign Exchange Forward [Member] CZK	Mar. 31, 2014 Fair Value (Level 2) [Member] Other Assets [Member] Foreign Exchange Forward [Member] USD ($)	Mar. 31, 2013 Fair Value (Level 2) [Member] Other Assets [Member] Foreign Exchange Forward [Member] USD ($)
Derivative [Line Items]
Maximum remaining maturity of forward foreign exchange contracts	13 months
Derivative, foreign currency bought				British Pound Sterling	British Pound Sterling	Australian Dollar	Australian Dollar	Euro	Euro	Czech Republic Koruna	Czech Republic Koruna
Foreign currency amount of foreign currency derivatives					£ 4,800,000		59,500,000		€ 7,900,000		(103,500,000)
US Dollar Amount				7,900,000		52,800,000		10,700,000		(5,100,000)
Weighted average exchange rate per $1 USD				0.61	0.61	1.13	1.13	0.74	0.74	20.17	20.17
Net unrealized fair value gain (loss) on foreign exchange contracts, effective portion	1,500,000	500,000	(100,000)
Net unrealized fair value gain on foreign exchange contracts, ineffective portion	0	300,000	0
Derivative assets, at fair value, net												$ 1,800,000	$ 300,000