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Fair Value Measurements and Interest Rate Swaps (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Accrued Expenses and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized Losses on Interest Rate Swaps	$ (3,061)	$ (551)
Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized Gains on Interest Rate Swaps	$ 0	$ 40

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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- Definition

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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