Stockholders' Deficit (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Components of Stockholder's equity
Beginning Balance			$ (19,516)
Net loss	(96,320)	(39,965)	(167,703)	(131,189)
Defined benefit plans, net of tax $649	2,112	(484)	1,972	(418)
Translation adjustment	(36,925)	20,073	(37,034)	19,554
Common stock issuance/other			(11)
Stock compensation			502
Ending Balance	(221,790)		(221,790)
Defined benefit plans, tax			649
Common Stock
Components of Stockholder's equity
Beginning Balance			791
Net loss
Defined benefit plans, net of tax $649
Translation adjustment
Common stock issuance/other
Stock compensation
Ending Balance	791		791
Additional Paid-in Capital
Components of Stockholder's equity
Beginning Balance			1,139,850
Net loss
Defined benefit plans, net of tax $649
Translation adjustment
Common stock issuance/other			(11)
Stock compensation			502
Ending Balance	1,140,341		1,140,341
Accumulated Deficit
Components of Stockholder's equity
Beginning Balance			(1,157,124)
Net loss			(167,443)
Defined benefit plans, net of tax $649
Translation adjustment
Common stock issuance/other
Stock compensation
Ending Balance	(1,324,567)		(1,324,567)
Accumulated Other Comprehensive Loss
Components of Stockholder's equity
Beginning Balance			(11,449)
Net loss
Defined benefit plans, net of tax $649			1,972
Translation adjustment			(37,038)
Common stock issuance/other
Stock compensation
Ending Balance	(46,515)		(46,515)
Noncontrolling Interests
Components of Stockholder's equity
Beginning Balance			8,416
Net loss			(260)
Defined benefit plans, net of tax $649
Translation adjustment			4
Common stock issuance/other
Stock compensation
Ending Balance	$ 8,160		$ 8,160