LEASES - Operating Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Lease cost under long-term operating leases	$ 3,197	$ 3,263	$ 6,472	$ 6,525
Lease cost under short-term operating leases	1,183	1,567	1,743	2,380
Variable lease cost under short-term and long-term operating leases	750	1,068	1,583	1,950
Total operating lease cost	$ 5,130	$ 5,898	$ 9,798	$ 10,855