Supplemental information related to leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of operating lease liabilities	$ 3,159	$ 4,213	$ 6,187	$ 7,259
Right-of-use assets obtained in exchange for new operating leases	$ 567	$ 3,633	$ 1,590	$ 4,101
Weighted Average Remaining Lease Term (years)	5 years 6 months 18 days	6 years 1 month 24 days	5 years 6 months 18 days	6 years 1 month 24 days
Weighted Average Collateralized Incremental Borrowing Rate	4.02%	4.75%	4.02%	4.75%