EMPLOYEE BENEFIT PLANS, Schedule of Estimated Future Benefit Payments (Details) $ in Thousands  | 
 Mar. 31, 2020  
USD ($) 
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| EMPLOYEE BENEFIT PLANS [Abstract] | |
| 2021 | $ 21,451 | 
| 2022 | 21,823 | 
| 2023 | 22,567 | 
| 2024 | 22,815 | 
| 2025 | 23,187 | 
| Aggregate 2026 - 2030 | $ 119,408 | 
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- References No definition available. 
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- Definition Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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