LEASES - Operating Lease Cost and Supplemental Cash Flow Information (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2020 USD ($)
Leases [Abstract]
Lease cost under long-term operating leases	$ 13,318
Lease cost under short-term operating leases	4,172
Variable lease cost under short-term and long-term operating leases	4,259
Total operating lease cost	21,749
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 11,127
Weighted average remaining lease term in years - operating leases	8 years 7 months 2 days
Weighted average discount rate - operating leases	4.10%