Income Taxes Information Regarding Deferred Taxes and Tax Credits (Details 6) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Schedule of Deferred Tax Assets and Liabilities [Line Items]
NOL recognized as an increase in stockholders equity upon realization	$ 7,424,000
Deferred Tax Assets	778,256,000	842,495,000
Future Earnings, Required for Realization of Deferred Tax Assets	3,800,000,000
Future Foreign Source Earnings Required for Realization of Deferred Tax Assets	673,317,000
Foreign Tax Credits for Which Valuation Allowance Has Been Recorded	39,919,000
Deferred Tax Assets, State Taxes	180,183,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	34,831,000
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation	0	0	0
Internal Revenue Service (IRS) [Member]
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Deferred Tax Assets	762,699,000
State and Local Jurisdiction [Member]
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	8,639,000
Foreign Tax Authority [Member]
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 467,000		$ 2,340,000