Other Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Other Liabilities Disclosure [Abstract]
Tax Act - Transition Tax	$ 89,700	$ 0
Pension	44,404	42,930
Warranty	27,965	25,521
Deferred income	7,094	4,929
Liability for uncertain tax benefits	1,684	1,562
Other	10,240	8,659
Total	$ 181,087	$ 83,601