Schedule of Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Mar. 31, 2015
Other Current Assets, Other Assets Accrued Expenses Other Current Liabilities and other Non current liabilities and Deferred Credits [Abstract]
Recoverable insurance losses	$ 9,682	$ 10,468
Deferred income tax assets	31,136	19,004
Deferred finance charges – revolver	7,125	7,396
Savings plans and supplemental plan	14,984	23,208
Other	19,423	15,120
Total other assets	$ 82,350	$ 75,196