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Debt Level 4 (Details) (USD $) In Thousands	Jun. 30, 2011	Mar. 31, 2011
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 210,000	$ 210,000
Line of Credit Facility, Amount Outstanding	0	0
Long-term Debt	$ 210,000	$ 210,000

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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