Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Payments:
Interest	$ 18,196	$ 13,855
Income Taxes	19,643	$ 27,390
Operating Cash Flows used for Operating Leases	7,861
Non Cash Financing Activities:
Property and Equipment Purchases Included in Accrued Liabilities	$ 2,868