Supplemental Cash Flow Disclosures (Schedule of Supplemental Cash Flow Disclosures and Non-Cash Investing and Financing Activities) (Details) (USD $) In Thousands	12 Months Ended
Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2009
Supplemental Cash Flow Disclosures
Interest	$ 83,133	$ 126,327	$ 178,641
Income taxes	77,690	89,973	(56,315)
Issuance of ordinary shares for acquisition of business			$ 270

Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph d

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 99-12

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- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 29

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 27
-Subparagraph f

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- Definition

The amount of cash paid during the current period for interest owed on money borrowed, net of interest capitalized.

+ References

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