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Schedule of Other Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Mar. 31, 2014
Other Assets, Accrued Expenses, Other Current Liabilities, And Other Liabilities And Deferred Credits [Abstract]    
Recoverable insurance losses $ 7,486 $ 5,219
Deferred income tax assets 35,367 34,376
Deferred finance charges - revolver 7,884 8,728
Savings plans and supplemental plan 23,563 23,212
Noncurrent tax receivable 9,106 9,106
Other 17,665 15,744
Total other assets $ 101,071 $ 96,385