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Schedule of Other Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Mar. 31, 2016
Other Assets, Noncurrent [Abstract]    
Recoverable insurance losses $ 11,047 $ 9,412
Deferred income tax assets 55,039 33,505
Savings plans and supplemental plan 14,452 14,472
Other 18,234 14,297
Total other assets $ 98,772 $ 71,686