Leases - Schedule of Components of Lease Expense (Detail) $ in Thousands	3 Months Ended
	Jun. 30, 2019 USD ($)
Operating lease cost
Short-term lease expense	$ 736
Total operating lease cost	1,774
Finance lease cost
Total finance lease cost	6,069
Cost of Goods Sold [Member]
Operating lease cost
Operating lease expense	948
Finance lease cost
Amortization of right-of-use assets	4,554
General and Administrative [Member]
Operating lease cost
Operating lease expense	90
Finance lease cost
Amortization of right-of-use assets	356
Interest Expense [Member]
Finance lease cost
Interest on lease liabilities	$ 1,159