Restructuring and Impairments, Net (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013 Position	Mar. 31, 2012	Mar. 31, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring and impairments, net	$ 71,495	$ 10,878	$ 42,286
Restructuring charges	11,343	7,105	33,231
Impairments, net	60,152	3,773	9,055
Number of positions eliminated	629
Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	8,451	7,858	24,654
Closure Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,892	$ (753)	$ 8,577