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Segment Information (Schedule Of Assets And Liabilities Of The Joint Venture Not Consolidated) (Details) (USD $)
In Thousands
Sep. 30, 2011
Mar. 31, 2011
Current Assets$ 192,839$ 174,626
Current Liabilities78,22470,350
Joint Venture [Member]
  
Current Assets45,36942,541
Non-Current Assets39,49533,457
Current Liabilities$ 15,252$ 10,296