Fair Value Measurement Of Assets And Liabilities (Financial Liabilities Not Carried At Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Mar. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	$ 2,184,095	$ 2,213,435
Fair Value	2,168,978	2,199,061
Level 1 [Member] | Term Loan Dated October 1, 2007 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	1,179,595	1,674,435
Fair Value	1,171,959	1,662,714
Level 1 [Member] | Term Loan Dated October 19, 2011 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	487,500
Fair Value	482,625
Level 2 [Member] | Asia Term Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	377,000	379,000
Fair Value	374,394	376,347
Revolving Credit Facility [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	140,000	160,000
Fair Value	$ 140,000	$ 160,000