Fair Value Measurement Of Assets And Liabilities (Financial Liabilities Not Carried At Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Mar. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount, Total	$ 2,193,930	$ 2,213,435
Fair Value, Total	2,166,290	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, Total	1,182,680	1,674,435
Fair Value, Total	1,173,892	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, Total	493,750
Fair Value, Total	477,703
Level 2 [Member] | Revolving Credit Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount, Total	140,000	160,000
Fair Value, Total	140,000	160,000
Level 2 [Member] | Asia Term Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount, Total	377,500	379,000
Fair Value, Total	$ 374,695	$ 376,347