Supplemental income statement information related to leases (Details) - USD ($) $ in Thousands		3 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Supplemental income statement information related to leases [Line Items]
Operating Lease, Cost	[1]	$ 5,101	$ 4,604
Cost of goods sold [Member]
Supplemental income statement information related to leases [Line Items]
Operating Lease, Cost		2,911	2,617
Selling, General and Administrative Expenses [Member]
Supplemental income statement information related to leases [Line Items]
Operating Lease, Cost		$ 2,190	$ 1,987

[1] Includes variable operating lease costs.