Related Party Transactions - Additional Information (Detail) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2009 Y	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Jun. 30, 2010 EUR (€) Y	Mar. 31, 2013 EUR (€)
Related Party Transactions [Abstract]
Related party transactions duration of agreement, years	3					5
Amount of transactions with related party during the financial reporting period						€ 6
Total expenses for engineering and software development services		3.8	8.2	19.3	24.4
Current asset, related party		$ 4.7		$ 4.7			€ 3.7